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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Casts string to value of specified numeric data type. If the string cannot be parsed, returns an error."><title>auto_cast_to_numeric in common_sql::convert - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">auto_cast_to_numeric</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>convert</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">convert</a></div><h1>Function <span class="fn">auto_<wbr>cast_<wbr>to_<wbr>numeric</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/common_sql/convert.rs.html#338-368">Source</a> </span></div><pre class="rust item-decl"><code>pub(crate) fn auto_cast_to_numeric(
s: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>,
data_type: &amp;ConcreteDataType,
) -&gt; <a class="type" href="../error/type.Result.html" title="type common_sql::error::Result">Result</a>&lt;<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;Value&gt;&gt;</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Casts string to value of specified numeric data type.
If the string cannot be parsed, returns an error.</p>
<p>Returns None if the data type doesn’t support auto casting.</p>
</div></details></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Deserialize default constraint from json bytes"><title>deserialize_default_constraint in common_sql::convert - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">deserialize_default_constraint</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>convert</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">convert</a></div><h1>Function <span class="fn">deserialize_<wbr>default_<wbr>constraint</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/common_sql/convert.rs.html#391-409">Source</a> </span></div><pre class="rust item-decl"><code>pub fn deserialize_default_constraint(
bytes: &amp;[<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.u8.html">u8</a>],
column_name: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>,
data_type: &amp;ConcreteDataType,
) -&gt; <a class="type" href="../error/type.Result.html" title="type common_sql::error::Result">Result</a>&lt;<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;ColumnDefaultConstraint&gt;&gt;</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Deserialize default constraint from json bytes</p>
</div></details></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `parse_hex_string` fn in crate `common_sql`."><title>parse_hex_string in common_sql::convert - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">parse_hex_string</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>convert</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">convert</a></div><h1>Function <span class="fn">parse_<wbr>hex_<wbr>string</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/common_sql/convert.rs.html#370-388">Source</a> </span></div><pre class="rust item-decl"><code>pub(crate) fn parse_hex_string(s: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -&gt; <a class="type" href="../error/type.Result.html" title="type common_sql::error::Result">Result</a>&lt;Value&gt;</code></pre></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `parse_sql_number` fn in crate `common_sql`."><title>parse_sql_number in common_sql::convert - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">parse_sql_number</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>convert</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">convert</a></div><h1>Function <span class="fn">parse_<wbr>sql_<wbr>number</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/common_sql/convert.rs.html#38-49">Source</a> </span></div><pre class="rust item-decl"><code>fn parse_sql_number&lt;R: <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/traits/trait.FromStr.html" title="trait core::str::traits::FromStr">FromStr</a> + <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>&gt;(n: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>) -&gt; <a class="type" href="../error/type.Result.html" title="type common_sql::error::Result">Result</a>&lt;R&gt;<div class="where">where
&lt;R as <a class="trait" href="https://doc.rust-lang.org/nightly/core/str/traits/trait.FromStr.html" title="trait core::str::traits::FromStr">FromStr</a>&gt;::<a class="associatedtype" href="https://doc.rust-lang.org/nightly/core/str/traits/trait.FromStr.html#associatedtype.Err" title="type core::str::traits::FromStr::Err">Err</a>: <a class="trait" href="https://doc.rust-lang.org/nightly/core/fmt/trait.Debug.html" title="trait core::fmt::Debug">Debug</a>,</div></code></pre></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `parse_string_to_value` fn in crate `common_sql`."><title>parse_string_to_value in common_sql::convert - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">parse_string_to_value</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>convert</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">convert</a></div><h1>Function <span class="fn">parse_<wbr>string_<wbr>to_<wbr>value</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/common_sql/convert.rs.html#246-332">Source</a> </span></div><pre class="rust item-decl"><code>pub(crate) fn parse_string_to_value(
column_name: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>,
s: <a class="struct" href="https://doc.rust-lang.org/nightly/alloc/string/struct.String.html" title="struct alloc::string::String">String</a>,
data_type: &amp;ConcreteDataType,
timezone: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;&amp;Timezone&gt;,
auto_string_to_numeric: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>,
) -&gt; <a class="type" href="../error/type.Result.html" title="type common_sql::error::Result">Result</a>&lt;Value&gt;</code></pre></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Convert a sql value into datatype’s value"><title>sql_number_to_value in common_sql::convert - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">sql_number_to_value</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>convert</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">convert</a></div><h1>Function <span class="fn">sql_<wbr>number_<wbr>to_<wbr>value</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/common_sql/convert.rs.html#105-121">Source</a> </span></div><pre class="rust item-decl"><code>pub(crate) fn sql_number_to_value(
data_type: &amp;ConcreteDataType,
n: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>,
) -&gt; <a class="type" href="../error/type.Result.html" title="type common_sql::error::Result">Result</a>&lt;Value&gt;</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Convert a sql value into datatype’s value</p>
</div></details></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Converts SQL value to value according to the data type. If `auto_string_to_numeric` is true, tries to cast the string value to numeric values, and returns error if the cast fails."><title>sql_value_to_value in common_sql::convert - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">sql_value_to_value</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>convert</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">convert</a></div><h1>Function <span class="fn">sql_<wbr>value_<wbr>to_<wbr>value</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/common_sql/convert.rs.html#126-244">Source</a> </span></div><pre class="rust item-decl"><code>pub fn sql_value_to_value(
column_name: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>,
data_type: &amp;ConcreteDataType,
sql_val: &amp;<a class="enum" href="enum.SqlValue.html" title="enum common_sql::convert::SqlValue">SqlValue</a>,
timezone: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;&amp;Timezone&gt;,
unary_op: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;<a class="enum" href="enum.UnaryOperator.html" title="enum common_sql::convert::UnaryOperator">UnaryOperator</a>&gt;,
auto_string_to_numeric: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.bool.html">bool</a>,
) -&gt; <a class="type" href="../error/type.Result.html" title="type common_sql::error::Result">Result</a>&lt;Value&gt;</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Converts SQL value to value according to the data type.
If <code>auto_string_to_numeric</code> is true, tries to cast the string value to numeric values,
and returns error if the cast fails.</p>
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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Invokes the provided closure iteratively with a mutable reference to all expressions present in `v`."><title>visit_expressions_mut in common_sql::convert - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">visit_expressions_mut</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">visit_<wbr>expressions_<wbr>mut</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#example" title="Example">Example</a><ul><li><a href="#remove-all-select-limits-in-sub-queries" title="Remove all select limits in sub-queries">Remove all select limits in sub-queries</a></li><li><a href="#wrap-column-name-in-function-call" title="Wrap column name in function call">Wrap column name in function call</a></li></ul></li></ul></section><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>convert</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">convert</a></div><h1>Function <span class="fn">visit_<wbr>expressions_<wbr>mut</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"></span></div><pre class="rust item-decl"><code>pub fn visit_expressions_mut&lt;V, E, F&gt;(v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut V</a>, f: F) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;E&gt;<div class="where">where
V: <a class="trait" href="trait.VisitMut.html" title="trait common_sql::convert::VisitMut">VisitMut</a>,
F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&amp;mut <a class="enum" href="enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;E&gt;,</div></code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Invokes the provided closure iteratively with a mutable reference to all expressions
present in <code>v</code>.</p>
<p>This performs a depth-first search, so if the closure mutates the expression</p>
<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2><h3 id="remove-all-select-limits-in-sub-queries"><a class="doc-anchor" href="#remove-all-select-limits-in-sub-queries">§</a>Remove all select limits in sub-queries</h3>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>sql = <span class="string">"SELECT (SELECT y FROM z LIMIT 9) FROM t LIMIT 3"</span>;
<span class="kw">let </span><span class="kw-2">mut </span>statements = Parser::parse_sql(<span class="kw-2">&amp;</span>GenericDialect{}, sql).unwrap();
<span class="comment">// Remove all select limits in sub-queries
</span>visit_expressions_mut(<span class="kw-2">&amp;mut </span>statements, |expr| {
<span class="kw">if let </span>Expr::Subquery(q) = expr {
q.limit_clause = <span class="prelude-val">None</span>;
}
ControlFlow::&lt;()&gt;::Continue(())
});
<span class="macro">assert_eq!</span>(statements[<span class="number">0</span>].to_string(), <span class="string">"SELECT (SELECT y FROM z) FROM t LIMIT 3"</span>);</code></pre></div><h3 id="wrap-column-name-in-function-call"><a class="doc-anchor" href="#wrap-column-name-in-function-call">§</a>Wrap column name in function call</h3>
<p>This demonstrates how to effectively replace an expression with another more complicated one
that references the original. This example avoids unnecessary allocations by using the
<a href="https://doc.rust-lang.org/nightly/core/mem/index.html" title="mod core::mem"><code>std::mem</code></a> family of functions.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>sql = <span class="string">"SELECT x, y FROM t"</span>;
<span class="kw">let </span><span class="kw-2">mut </span>statements = Parser::parse_sql(<span class="kw-2">&amp;</span>GenericDialect{}, sql).unwrap();
visit_expressions_mut(<span class="kw-2">&amp;mut </span>statements, |expr| {
<span class="kw">if </span><span class="macro">matches!</span>(expr, Expr::Identifier(col_name) <span class="kw">if </span>col_name.value == <span class="string">"x"</span>) {
<span class="kw">let </span>old_expr = std::mem::replace(expr, Expr::value(Value::Null));
<span class="kw-2">*</span>expr = Expr::Function(Function {
name: ObjectName::from(<span class="macro">vec!</span>[Ident::new(<span class="string">"f"</span>)]),
uses_odbc_syntax: <span class="bool-val">false</span>,
args: FunctionArguments::List(FunctionArgumentList {
duplicate_treatment: <span class="prelude-val">None</span>,
args: <span class="macro">vec!</span>[FunctionArg::Unnamed(FunctionArgExpr::Expr(old_expr))],
clauses: <span class="macro">vec!</span>[],
}),
null_treatment: <span class="prelude-val">None</span>,
filter: <span class="prelude-val">None</span>,
over: <span class="prelude-val">None</span>,
parameters: FunctionArguments::None,
within_group: <span class="macro">vec!</span>[],
});
}
ControlFlow::&lt;()&gt;::Continue(())
});
<span class="macro">assert_eq!</span>(statements[<span class="number">0</span>].to_string(), <span class="string">"SELECT f(x), y FROM t"</span>);</code></pre></div></div></details></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Invokes the provided closure on all statements (e.g. `SELECT`, `CREATE TABLE`, etc) present in `v`"><title>visit_statements_mut in common_sql::convert - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">visit_statements_mut</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">visit_<wbr>statements_<wbr>mut</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#example" title="Example">Example</a></li></ul></section><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>convert</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">convert</a></div><h1>Function <span class="fn">visit_<wbr>statements_<wbr>mut</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"></span></div><pre class="rust item-decl"><code>pub fn visit_statements_mut&lt;V, E, F&gt;(v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut V</a>, f: F) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;E&gt;<div class="where">where
V: <a class="trait" href="trait.VisitMut.html" title="trait common_sql::convert::VisitMut">VisitMut</a>,
F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&amp;mut Statement) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;E&gt;,</div></code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Invokes the provided closure on all statements (e.g. <code>SELECT</code>, <code>CREATE TABLE</code>, etc) present in <code>v</code></p>
<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>sql = <span class="string">"SELECT x FROM foo LIMIT 9+$limit; SELECT * FROM t LIMIT f()"</span>;
<span class="kw">let </span><span class="kw-2">mut </span>statements = Parser::parse_sql(<span class="kw-2">&amp;</span>GenericDialect{}, sql).unwrap();
<span class="comment">// Remove all select limits in outer statements (not in sub-queries)
</span>visit_statements_mut(<span class="kw-2">&amp;mut </span>statements, |stmt| {
<span class="kw">if let </span>Statement::Query(q) = stmt {
q.limit_clause = <span class="prelude-val">None</span>;
}
ControlFlow::&lt;()&gt;::Continue(())
});
<span class="macro">assert_eq!</span>(statements[<span class="number">0</span>].to_string(), <span class="string">"SELECT x FROM foo"</span>);
<span class="macro">assert_eq!</span>(statements[<span class="number">1</span>].to_string(), <span class="string">"SELECT * FROM t"</span>);</code></pre></div></div></details></section></div></main></body></html>

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<html lang="en">
<head>
<meta http-equiv="refresh" content="0;URL=macro.parse_number_to_value.html">
<title>Redirection</title>
</head>
<body>
<p>Redirecting to <a href="macro.parse_number_to_value.html">macro.parse_number_to_value.html</a>...</p>
<script>location.replace("macro.parse_number_to_value.html" + location.search + location.hash);</script>
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($data_type: expr, $n: ident, $(($Type: ident, $PrimitiveType: ident, $Target: ident)), +) =&gt; { ... };
}</code></pre></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="A visitor that can be used to walk an AST tree."><title>Visitor in common_sql::convert - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">Visitor</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Visitor</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#see-also" title="See also">See also</a></li><li><a href="#example" title="Example">Example</a></li></ul><h3><a href="#required-associated-types">Required Associated Types</a></h3><ul class="block"><li><a href="#associatedtype.Break" title="Break">Break</a></li></ul><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.post_visit_expr" title="post_visit_expr">post_visit_expr</a></li><li><a href="#method.post_visit_query" title="post_visit_query">post_visit_query</a></li><li><a href="#method.post_visit_relation" title="post_visit_relation">post_visit_relation</a></li><li><a href="#method.post_visit_statement" title="post_visit_statement">post_visit_statement</a></li><li><a href="#method.post_visit_table_factor" title="post_visit_table_factor">post_visit_table_factor</a></li><li><a href="#method.post_visit_value" title="post_visit_value">post_visit_value</a></li><li><a href="#method.pre_visit_expr" title="pre_visit_expr">pre_visit_expr</a></li><li><a href="#method.pre_visit_query" title="pre_visit_query">pre_visit_query</a></li><li><a href="#method.pre_visit_relation" title="pre_visit_relation">pre_visit_relation</a></li><li><a href="#method.pre_visit_statement" title="pre_visit_statement">pre_visit_statement</a></li><li><a href="#method.pre_visit_table_factor" title="pre_visit_table_factor">pre_visit_table_factor</a></li><li><a href="#method.pre_visit_value" title="pre_visit_value">pre_visit_value</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>convert</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">convert</a></div><h1>Trait <span class="trait">Visitor</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"></span></div><pre class="rust item-decl"><code>pub trait Visitor {
type <a href="#associatedtype.Break" class="associatedtype">Break</a>;
// Provided methods
fn <a href="#method.pre_visit_query" class="fn">pre_visit_query</a>(&amp;mut self, _query: &amp;Query) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_query" class="fn">post_visit_query</a>(&amp;mut self, _query: &amp;Query) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_relation" class="fn">pre_visit_relation</a>(
&amp;mut self,
_relation: &amp;<a class="struct" href="struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_relation" class="fn">post_visit_relation</a>(
&amp;mut self,
_relation: &amp;<a class="struct" href="struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_table_factor" class="fn">pre_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_table_factor" class="fn">post_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_expr" class="fn">pre_visit_expr</a>(&amp;mut self, _expr: &amp;<a class="enum" href="enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_expr" class="fn">post_visit_expr</a>(&amp;mut self, _expr: &amp;<a class="enum" href="enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_statement" class="fn">pre_visit_statement</a>(
&amp;mut self,
_statement: &amp;Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_statement" class="fn">post_visit_statement</a>(
&amp;mut self,
_statement: &amp;Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_value" class="fn">pre_visit_value</a>(&amp;mut self, _value: &amp;<a class="enum" href="enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_value" class="fn">post_visit_value</a>(&amp;mut self, _value: &amp;<a class="enum" href="enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A visitor that can be used to walk an AST tree.</p>
<p><code>pre_visit_</code> methods are invoked before visiting all children of the
node and <code>post_visit_</code> methods are invoked after visiting all
children of the node.</p>
<h2 id="see-also"><a class="doc-anchor" href="#see-also">§</a>See also</h2>
<p>These methods provide a more concise way of visiting nodes of a certain type:</p>
<ul>
<li>[visit_relations]</li>
<li>[visit_expressions]</li>
<li>[visit_statements]</li>
</ul>
<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="comment">// A structure that records statements and relations
</span><span class="attr">#[derive(Default)]
</span><span class="kw">struct </span>V {
visited: Vec&lt;String&gt;,
}
<span class="comment">// Visit relations and exprs before children are visited (depth first walk)
// Note you can also visit statements and visit exprs after children have been visited
</span><span class="kw">impl </span>Visitor <span class="kw">for </span>V {
<span class="kw">type </span>Break = ();
<span class="kw">fn </span>pre_visit_relation(<span class="kw-2">&amp;mut </span><span class="self">self</span>, relation: <span class="kw-2">&amp;</span>ObjectName) -&gt; ControlFlow&lt;<span class="self">Self</span>::Break&gt; {
<span class="self">self</span>.visited.push(<span class="macro">format!</span>(<span class="string">"PRE: RELATION: {}"</span>, relation));
ControlFlow::Continue(())
}
<span class="kw">fn </span>pre_visit_expr(<span class="kw-2">&amp;mut </span><span class="self">self</span>, expr: <span class="kw-2">&amp;</span>Expr) -&gt; ControlFlow&lt;<span class="self">Self</span>::Break&gt; {
<span class="self">self</span>.visited.push(<span class="macro">format!</span>(<span class="string">"PRE: EXPR: {}"</span>, expr));
ControlFlow::Continue(())
}
}
<span class="kw">let </span>sql = <span class="string">"SELECT a FROM foo where x IN (SELECT y FROM bar)"</span>;
<span class="kw">let </span>statements = Parser::parse_sql(<span class="kw-2">&amp;</span>GenericDialect{}, sql)
.unwrap();
<span class="comment">// Drive the visitor through the AST
</span><span class="kw">let </span><span class="kw-2">mut </span>visitor = V::default();
statements.visit(<span class="kw-2">&amp;mut </span>visitor);
<span class="comment">// The visitor has visited statements and expressions in pre-traversal order
</span><span class="kw">let </span>expected : Vec&lt;<span class="kw">_</span>&gt; = [
<span class="string">"PRE: EXPR: a"</span>,
<span class="string">"PRE: RELATION: foo"</span>,
<span class="string">"PRE: EXPR: x IN (SELECT y FROM bar)"</span>,
<span class="string">"PRE: EXPR: x"</span>,
<span class="string">"PRE: EXPR: y"</span>,
<span class="string">"PRE: RELATION: bar"</span>,
]
.into_iter().map(|s| s.to_string()).collect();
<span class="macro">assert_eq!</span>(visitor.visited, expected);</code></pre></div></div></details><h2 id="required-associated-types" class="section-header">Required Associated Types<a href="#required-associated-types" class="anchor">§</a></h2><div class="methods"><details class="toggle" open><summary><section id="associatedtype.Break" class="method"><h4 class="code-header">type <a href="#associatedtype.Break" class="associatedtype">Break</a></h4></section></summary><div class="docblock"><p>Type returned when the recursion returns early.</p>
</div></details></div><h2 id="provided-methods" class="section-header">Provided Methods<a href="#provided-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="method.pre_visit_query" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_query" class="fn">pre_visit_query</a>(&amp;mut self, _query: &amp;Query) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any queries that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_query" class="method"><h4 class="code-header">fn <a href="#method.post_visit_query" class="fn">post_visit_query</a>(&amp;mut self, _query: &amp;Query) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any queries that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_relation" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_relation" class="fn">pre_visit_relation</a>(
&amp;mut self,
_relation: &amp;<a class="struct" href="struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any relations (e.g. tables) that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_relation" class="method"><h4 class="code-header">fn <a href="#method.post_visit_relation" class="fn">post_visit_relation</a>(
&amp;mut self,
_relation: &amp;<a class="struct" href="struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any relations (e.g. tables) that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_table_factor" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_table_factor" class="fn">pre_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any table factors that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_table_factor" class="method"><h4 class="code-header">fn <a href="#method.post_visit_table_factor" class="fn">post_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any table factors that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_expr" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_expr" class="fn">pre_visit_expr</a>(&amp;mut self, _expr: &amp;<a class="enum" href="enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any expressions that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_expr" class="method"><h4 class="code-header">fn <a href="#method.post_visit_expr" class="fn">post_visit_expr</a>(&amp;mut self, _expr: &amp;<a class="enum" href="enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any expressions that appear in the AST</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_statement" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_statement" class="fn">pre_visit_statement</a>(
&amp;mut self,
_statement: &amp;Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any statements that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_statement" class="method"><h4 class="code-header">fn <a href="#method.post_visit_statement" class="fn">post_visit_statement</a>(
&amp;mut self,
_statement: &amp;Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any statements that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_value" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_value" class="fn">pre_visit_value</a>(&amp;mut self, _value: &amp;<a class="enum" href="enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any Value that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_value" class="method"><h4 class="code-header">fn <a href="#method.post_visit_value" class="fn">post_visit_value</a>(&amp;mut self, _value: &amp;<a class="enum" href="enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any Value that appear in the AST after visiting children</p>
</div></details></div><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"></div><script src="../../trait.impl/sqlparser/ast/visitor/trait.Visitor.js" async></script></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="A visitor that can be used to mutate an AST tree."><title>VisitorMut in common_sql::convert - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">VisitorMut</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Visitor<wbr>Mut</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#see-also" title="See also">See also</a></li><li><a href="#example" title="Example">Example</a></li></ul><h3><a href="#required-associated-types">Required Associated Types</a></h3><ul class="block"><li><a href="#associatedtype.Break" title="Break">Break</a></li></ul><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.post_visit_expr" title="post_visit_expr">post_visit_expr</a></li><li><a href="#method.post_visit_query" title="post_visit_query">post_visit_query</a></li><li><a href="#method.post_visit_relation" title="post_visit_relation">post_visit_relation</a></li><li><a href="#method.post_visit_statement" title="post_visit_statement">post_visit_statement</a></li><li><a href="#method.post_visit_table_factor" title="post_visit_table_factor">post_visit_table_factor</a></li><li><a href="#method.post_visit_value" title="post_visit_value">post_visit_value</a></li><li><a href="#method.pre_visit_expr" title="pre_visit_expr">pre_visit_expr</a></li><li><a href="#method.pre_visit_query" title="pre_visit_query">pre_visit_query</a></li><li><a href="#method.pre_visit_relation" title="pre_visit_relation">pre_visit_relation</a></li><li><a href="#method.pre_visit_statement" title="pre_visit_statement">pre_visit_statement</a></li><li><a href="#method.pre_visit_table_factor" title="pre_visit_table_factor">pre_visit_table_factor</a></li><li><a href="#method.pre_visit_value" title="pre_visit_value">pre_visit_value</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>convert</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">convert</a></div><h1>Trait <span class="trait">Visitor<wbr>Mut</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"></span></div><pre class="rust item-decl"><code>pub trait VisitorMut {
type <a href="#associatedtype.Break" class="associatedtype">Break</a>;
// Provided methods
fn <a href="#method.pre_visit_query" class="fn">pre_visit_query</a>(
&amp;mut self,
_query: &amp;mut Query,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_query" class="fn">post_visit_query</a>(
&amp;mut self,
_query: &amp;mut Query,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_relation" class="fn">pre_visit_relation</a>(
&amp;mut self,
_relation: &amp;mut <a class="struct" href="struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_relation" class="fn">post_visit_relation</a>(
&amp;mut self,
_relation: &amp;mut <a class="struct" href="struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_table_factor" class="fn">pre_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;mut TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_table_factor" class="fn">post_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;mut TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_expr" class="fn">pre_visit_expr</a>(&amp;mut self, _expr: &amp;mut <a class="enum" href="enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_expr" class="fn">post_visit_expr</a>(&amp;mut self, _expr: &amp;mut <a class="enum" href="enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_statement" class="fn">pre_visit_statement</a>(
&amp;mut self,
_statement: &amp;mut Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_statement" class="fn">post_visit_statement</a>(
&amp;mut self,
_statement: &amp;mut Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_value" class="fn">pre_visit_value</a>(
&amp;mut self,
_value: &amp;mut <a class="enum" href="enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_value" class="fn">post_visit_value</a>(
&amp;mut self,
_value: &amp;mut <a class="enum" href="enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A visitor that can be used to mutate an AST tree.</p>
<p><code>pre_visit_</code> methods are invoked before visiting all children of the
node and <code>post_visit_</code> methods are invoked after visiting all
children of the node.</p>
<h2 id="see-also"><a class="doc-anchor" href="#see-also">§</a>See also</h2>
<p>These methods provide a more concise way of visiting nodes of a certain type:</p>
<ul>
<li>[visit_relations_mut]</li>
<li><a href="fn.visit_expressions_mut.html" title="fn common_sql::convert::visit_expressions_mut">visit_expressions_mut</a></li>
<li><a href="fn.visit_statements_mut.html" title="fn common_sql::convert::visit_statements_mut">visit_statements_mut</a></li>
</ul>
<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code>
<span class="comment">// A visitor that replaces "to_replace" with "replaced" in all expressions
</span><span class="kw">struct </span>Replacer;
<span class="comment">// Visit each expression after its children have been visited
</span><span class="kw">impl </span>VisitorMut <span class="kw">for </span>Replacer {
<span class="kw">type </span>Break = ();
<span class="kw">fn </span>post_visit_expr(<span class="kw-2">&amp;mut </span><span class="self">self</span>, expr: <span class="kw-2">&amp;mut </span>Expr) -&gt; ControlFlow&lt;<span class="self">Self</span>::Break&gt; {
<span class="kw">if let </span>Expr::Identifier(Ident{ value, ..}) = expr {
<span class="kw-2">*</span>value = value.replace(<span class="string">"to_replace"</span>, <span class="string">"replaced"</span>)
}
ControlFlow::Continue(())
}
}
<span class="kw">let </span>sql = <span class="string">"SELECT to_replace FROM foo where to_replace IN (SELECT to_replace FROM bar)"</span>;
<span class="kw">let </span><span class="kw-2">mut </span>statements = Parser::parse_sql(<span class="kw-2">&amp;</span>GenericDialect{}, sql).unwrap();
<span class="comment">// Drive the visitor through the AST
</span>statements.visit(<span class="kw-2">&amp;mut </span>Replacer);
<span class="macro">assert_eq!</span>(statements[<span class="number">0</span>].to_string(), <span class="string">"SELECT replaced FROM foo WHERE replaced IN (SELECT replaced FROM bar)"</span>);</code></pre></div></div></details><h2 id="required-associated-types" class="section-header">Required Associated Types<a href="#required-associated-types" class="anchor">§</a></h2><div class="methods"><details class="toggle" open><summary><section id="associatedtype.Break" class="method"><h4 class="code-header">type <a href="#associatedtype.Break" class="associatedtype">Break</a></h4></section></summary><div class="docblock"><p>Type returned when the recursion returns early.</p>
</div></details></div><h2 id="provided-methods" class="section-header">Provided Methods<a href="#provided-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="method.pre_visit_query" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_query" class="fn">pre_visit_query</a>(&amp;mut self, _query: &amp;mut Query) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any queries that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_query" class="method"><h4 class="code-header">fn <a href="#method.post_visit_query" class="fn">post_visit_query</a>(&amp;mut self, _query: &amp;mut Query) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any queries that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_relation" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_relation" class="fn">pre_visit_relation</a>(
&amp;mut self,
_relation: &amp;mut <a class="struct" href="struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any relations (e.g. tables) that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_relation" class="method"><h4 class="code-header">fn <a href="#method.post_visit_relation" class="fn">post_visit_relation</a>(
&amp;mut self,
_relation: &amp;mut <a class="struct" href="struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any relations (e.g. tables) that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_table_factor" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_table_factor" class="fn">pre_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;mut TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any table factors that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_table_factor" class="method"><h4 class="code-header">fn <a href="#method.post_visit_table_factor" class="fn">post_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;mut TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any table factors that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_expr" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_expr" class="fn">pre_visit_expr</a>(&amp;mut self, _expr: &amp;mut <a class="enum" href="enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any expressions that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_expr" class="method"><h4 class="code-header">fn <a href="#method.post_visit_expr" class="fn">post_visit_expr</a>(&amp;mut self, _expr: &amp;mut <a class="enum" href="enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any expressions that appear in the AST</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_statement" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_statement" class="fn">pre_visit_statement</a>(
&amp;mut self,
_statement: &amp;mut Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any statements that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_statement" class="method"><h4 class="code-header">fn <a href="#method.post_visit_statement" class="fn">post_visit_statement</a>(
&amp;mut self,
_statement: &amp;mut Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any statements that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_value" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_value" class="fn">pre_visit_value</a>(&amp;mut self, _value: &amp;mut <a class="enum" href="enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any value that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_value" class="method"><h4 class="code-header">fn <a href="#method.post_visit_value" class="fn">post_visit_value</a>(&amp;mut self, _value: &amp;mut <a class="enum" href="enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any statements that appear in the AST after visiting children</p>
</div></details></div><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"></div><script src="../../trait.impl/sqlparser/ast/visitor/trait.VisitorMut.js" async></script></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `parse_column_default_constraint` fn in crate `common_sql`."><title>parse_column_default_constraint in common_sql::default_constraint - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">parse_column_default_constraint</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>default_<wbr>constraint</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">default_constraint</a></div><h1>Function <span class="fn">parse_<wbr>column_<wbr>default_<wbr>constraint</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/common_sql/default_constraint.rs.html#31-119">Source</a> </span></div><pre class="rust item-decl"><code>pub fn parse_column_default_constraint(
column_name: &amp;<a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.str.html">str</a>,
data_type: &amp;ConcreteDataType,
opts: &amp;[<a class="struct" href="../convert/struct.ColumnOptionDef.html" title="struct common_sql::convert::ColumnOptionDef">ColumnOptionDef</a>],
timezone: <a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;&amp;Timezone&gt;,
) -&gt; <a class="type" href="../error/type.Result.html" title="type common_sql::error::Result">Result</a>&lt;<a class="enum" href="https://doc.rust-lang.org/nightly/core/option/enum.Option.html" title="enum core::option::Option">Option</a>&lt;ColumnDefaultConstraint&gt;&gt;</code></pre></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Invokes the provided closure iteratively with a mutable reference to all expressions present in `v`."><title>visit_expressions_mut in common_sql::default_constraint - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">visit_expressions_mut</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">visit_<wbr>expressions_<wbr>mut</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#example" title="Example">Example</a><ul><li><a href="#remove-all-select-limits-in-sub-queries" title="Remove all select limits in sub-queries">Remove all select limits in sub-queries</a></li><li><a href="#wrap-column-name-in-function-call" title="Wrap column name in function call">Wrap column name in function call</a></li></ul></li></ul></section><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>default_<wbr>constraint</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">default_constraint</a></div><h1>Function <span class="fn">visit_<wbr>expressions_<wbr>mut</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"></span></div><pre class="rust item-decl"><code>pub fn visit_expressions_mut&lt;V, E, F&gt;(v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut V</a>, f: F) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;E&gt;<div class="where">where
V: <a class="trait" href="../convert/trait.VisitMut.html" title="trait common_sql::convert::VisitMut">VisitMut</a>,
F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&amp;mut <a class="enum" href="../convert/enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;E&gt;,</div></code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Invokes the provided closure iteratively with a mutable reference to all expressions
present in <code>v</code>.</p>
<p>This performs a depth-first search, so if the closure mutates the expression</p>
<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2><h3 id="remove-all-select-limits-in-sub-queries"><a class="doc-anchor" href="#remove-all-select-limits-in-sub-queries">§</a>Remove all select limits in sub-queries</h3>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>sql = <span class="string">"SELECT (SELECT y FROM z LIMIT 9) FROM t LIMIT 3"</span>;
<span class="kw">let </span><span class="kw-2">mut </span>statements = Parser::parse_sql(<span class="kw-2">&amp;</span>GenericDialect{}, sql).unwrap();
<span class="comment">// Remove all select limits in sub-queries
</span>visit_expressions_mut(<span class="kw-2">&amp;mut </span>statements, |expr| {
<span class="kw">if let </span>Expr::Subquery(q) = expr {
q.limit_clause = <span class="prelude-val">None</span>;
}
ControlFlow::&lt;()&gt;::Continue(())
});
<span class="macro">assert_eq!</span>(statements[<span class="number">0</span>].to_string(), <span class="string">"SELECT (SELECT y FROM z) FROM t LIMIT 3"</span>);</code></pre></div><h3 id="wrap-column-name-in-function-call"><a class="doc-anchor" href="#wrap-column-name-in-function-call">§</a>Wrap column name in function call</h3>
<p>This demonstrates how to effectively replace an expression with another more complicated one
that references the original. This example avoids unnecessary allocations by using the
<a href="https://doc.rust-lang.org/nightly/core/mem/index.html" title="mod core::mem"><code>std::mem</code></a> family of functions.</p>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>sql = <span class="string">"SELECT x, y FROM t"</span>;
<span class="kw">let </span><span class="kw-2">mut </span>statements = Parser::parse_sql(<span class="kw-2">&amp;</span>GenericDialect{}, sql).unwrap();
visit_expressions_mut(<span class="kw-2">&amp;mut </span>statements, |expr| {
<span class="kw">if </span><span class="macro">matches!</span>(expr, Expr::Identifier(col_name) <span class="kw">if </span>col_name.value == <span class="string">"x"</span>) {
<span class="kw">let </span>old_expr = std::mem::replace(expr, Expr::value(Value::Null));
<span class="kw-2">*</span>expr = Expr::Function(Function {
name: ObjectName::from(<span class="macro">vec!</span>[Ident::new(<span class="string">"f"</span>)]),
uses_odbc_syntax: <span class="bool-val">false</span>,
args: FunctionArguments::List(FunctionArgumentList {
duplicate_treatment: <span class="prelude-val">None</span>,
args: <span class="macro">vec!</span>[FunctionArg::Unnamed(FunctionArgExpr::Expr(old_expr))],
clauses: <span class="macro">vec!</span>[],
}),
null_treatment: <span class="prelude-val">None</span>,
filter: <span class="prelude-val">None</span>,
over: <span class="prelude-val">None</span>,
parameters: FunctionArguments::None,
within_group: <span class="macro">vec!</span>[],
});
}
ControlFlow::&lt;()&gt;::Continue(())
});
<span class="macro">assert_eq!</span>(statements[<span class="number">0</span>].to_string(), <span class="string">"SELECT f(x), y FROM t"</span>);</code></pre></div></div></details></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="Invokes the provided closure on all statements (e.g. `SELECT`, `CREATE TABLE`, etc) present in `v`"><title>visit_statements_mut in common_sql::default_constraint - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc fn"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">visit_statements_mut</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">visit_<wbr>statements_<wbr>mut</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#example" title="Example">Example</a></li></ul></section><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>default_<wbr>constraint</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">default_constraint</a></div><h1>Function <span class="fn">visit_<wbr>statements_<wbr>mut</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"></span></div><pre class="rust item-decl"><code>pub fn visit_statements_mut&lt;V, E, F&gt;(v: <a class="primitive" href="https://doc.rust-lang.org/nightly/std/primitive.reference.html">&amp;mut V</a>, f: F) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;E&gt;<div class="where">where
V: <a class="trait" href="../convert/trait.VisitMut.html" title="trait common_sql::convert::VisitMut">VisitMut</a>,
F: <a class="trait" href="https://doc.rust-lang.org/nightly/core/ops/function/trait.FnMut.html" title="trait core::ops::function::FnMut">FnMut</a>(&amp;mut Statement) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;E&gt;,</div></code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>Invokes the provided closure on all statements (e.g. <code>SELECT</code>, <code>CREATE TABLE</code>, etc) present in <code>v</code></p>
<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="kw">let </span>sql = <span class="string">"SELECT x FROM foo LIMIT 9+$limit; SELECT * FROM t LIMIT f()"</span>;
<span class="kw">let </span><span class="kw-2">mut </span>statements = Parser::parse_sql(<span class="kw-2">&amp;</span>GenericDialect{}, sql).unwrap();
<span class="comment">// Remove all select limits in outer statements (not in sub-queries)
</span>visit_statements_mut(<span class="kw-2">&amp;mut </span>statements, |stmt| {
<span class="kw">if let </span>Statement::Query(q) = stmt {
q.limit_clause = <span class="prelude-val">None</span>;
}
ControlFlow::&lt;()&gt;::Continue(())
});
<span class="macro">assert_eq!</span>(statements[<span class="number">0</span>].to_string(), <span class="string">"SELECT x FROM foo"</span>);
<span class="macro">assert_eq!</span>(statements[<span class="number">1</span>].to_string(), <span class="string">"SELECT * FROM t"</span>);</code></pre></div></div></details></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="A visitor that can be used to walk an AST tree."><title>Visitor in common_sql::default_constraint - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">Visitor</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Visitor</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#see-also" title="See also">See also</a></li><li><a href="#example" title="Example">Example</a></li></ul><h3><a href="#required-associated-types">Required Associated Types</a></h3><ul class="block"><li><a href="#associatedtype.Break" title="Break">Break</a></li></ul><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.post_visit_expr" title="post_visit_expr">post_visit_expr</a></li><li><a href="#method.post_visit_query" title="post_visit_query">post_visit_query</a></li><li><a href="#method.post_visit_relation" title="post_visit_relation">post_visit_relation</a></li><li><a href="#method.post_visit_statement" title="post_visit_statement">post_visit_statement</a></li><li><a href="#method.post_visit_table_factor" title="post_visit_table_factor">post_visit_table_factor</a></li><li><a href="#method.post_visit_value" title="post_visit_value">post_visit_value</a></li><li><a href="#method.pre_visit_expr" title="pre_visit_expr">pre_visit_expr</a></li><li><a href="#method.pre_visit_query" title="pre_visit_query">pre_visit_query</a></li><li><a href="#method.pre_visit_relation" title="pre_visit_relation">pre_visit_relation</a></li><li><a href="#method.pre_visit_statement" title="pre_visit_statement">pre_visit_statement</a></li><li><a href="#method.pre_visit_table_factor" title="pre_visit_table_factor">pre_visit_table_factor</a></li><li><a href="#method.pre_visit_value" title="pre_visit_value">pre_visit_value</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>default_<wbr>constraint</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">default_constraint</a></div><h1>Trait <span class="trait">Visitor</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"></span></div><pre class="rust item-decl"><code>pub trait Visitor {
type <a href="#associatedtype.Break" class="associatedtype">Break</a>;
// Provided methods
fn <a href="#method.pre_visit_query" class="fn">pre_visit_query</a>(&amp;mut self, _query: &amp;Query) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_query" class="fn">post_visit_query</a>(&amp;mut self, _query: &amp;Query) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_relation" class="fn">pre_visit_relation</a>(
&amp;mut self,
_relation: &amp;<a class="struct" href="../convert/struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_relation" class="fn">post_visit_relation</a>(
&amp;mut self,
_relation: &amp;<a class="struct" href="../convert/struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_table_factor" class="fn">pre_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_table_factor" class="fn">post_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_expr" class="fn">pre_visit_expr</a>(&amp;mut self, _expr: &amp;<a class="enum" href="../convert/enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_expr" class="fn">post_visit_expr</a>(&amp;mut self, _expr: &amp;<a class="enum" href="../convert/enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_statement" class="fn">pre_visit_statement</a>(
&amp;mut self,
_statement: &amp;Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_statement" class="fn">post_visit_statement</a>(
&amp;mut self,
_statement: &amp;Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_value" class="fn">pre_visit_value</a>(&amp;mut self, _value: &amp;<a class="enum" href="../convert/enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_value" class="fn">post_visit_value</a>(&amp;mut self, _value: &amp;<a class="enum" href="../convert/enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt; { ... }
}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A visitor that can be used to walk an AST tree.</p>
<p><code>pre_visit_</code> methods are invoked before visiting all children of the
node and <code>post_visit_</code> methods are invoked after visiting all
children of the node.</p>
<h2 id="see-also"><a class="doc-anchor" href="#see-also">§</a>See also</h2>
<p>These methods provide a more concise way of visiting nodes of a certain type:</p>
<ul>
<li>[visit_relations]</li>
<li>[visit_expressions]</li>
<li>[visit_statements]</li>
</ul>
<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code><span class="comment">// A structure that records statements and relations
</span><span class="attr">#[derive(Default)]
</span><span class="kw">struct </span>V {
visited: Vec&lt;String&gt;,
}
<span class="comment">// Visit relations and exprs before children are visited (depth first walk)
// Note you can also visit statements and visit exprs after children have been visited
</span><span class="kw">impl </span>Visitor <span class="kw">for </span>V {
<span class="kw">type </span>Break = ();
<span class="kw">fn </span>pre_visit_relation(<span class="kw-2">&amp;mut </span><span class="self">self</span>, relation: <span class="kw-2">&amp;</span>ObjectName) -&gt; ControlFlow&lt;<span class="self">Self</span>::Break&gt; {
<span class="self">self</span>.visited.push(<span class="macro">format!</span>(<span class="string">"PRE: RELATION: {}"</span>, relation));
ControlFlow::Continue(())
}
<span class="kw">fn </span>pre_visit_expr(<span class="kw-2">&amp;mut </span><span class="self">self</span>, expr: <span class="kw-2">&amp;</span>Expr) -&gt; ControlFlow&lt;<span class="self">Self</span>::Break&gt; {
<span class="self">self</span>.visited.push(<span class="macro">format!</span>(<span class="string">"PRE: EXPR: {}"</span>, expr));
ControlFlow::Continue(())
}
}
<span class="kw">let </span>sql = <span class="string">"SELECT a FROM foo where x IN (SELECT y FROM bar)"</span>;
<span class="kw">let </span>statements = Parser::parse_sql(<span class="kw-2">&amp;</span>GenericDialect{}, sql)
.unwrap();
<span class="comment">// Drive the visitor through the AST
</span><span class="kw">let </span><span class="kw-2">mut </span>visitor = V::default();
statements.visit(<span class="kw-2">&amp;mut </span>visitor);
<span class="comment">// The visitor has visited statements and expressions in pre-traversal order
</span><span class="kw">let </span>expected : Vec&lt;<span class="kw">_</span>&gt; = [
<span class="string">"PRE: EXPR: a"</span>,
<span class="string">"PRE: RELATION: foo"</span>,
<span class="string">"PRE: EXPR: x IN (SELECT y FROM bar)"</span>,
<span class="string">"PRE: EXPR: x"</span>,
<span class="string">"PRE: EXPR: y"</span>,
<span class="string">"PRE: RELATION: bar"</span>,
]
.into_iter().map(|s| s.to_string()).collect();
<span class="macro">assert_eq!</span>(visitor.visited, expected);</code></pre></div></div></details><h2 id="required-associated-types" class="section-header">Required Associated Types<a href="#required-associated-types" class="anchor">§</a></h2><div class="methods"><details class="toggle" open><summary><section id="associatedtype.Break" class="method"><h4 class="code-header">type <a href="#associatedtype.Break" class="associatedtype">Break</a></h4></section></summary><div class="docblock"><p>Type returned when the recursion returns early.</p>
</div></details></div><h2 id="provided-methods" class="section-header">Provided Methods<a href="#provided-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="method.pre_visit_query" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_query" class="fn">pre_visit_query</a>(&amp;mut self, _query: &amp;Query) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any queries that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_query" class="method"><h4 class="code-header">fn <a href="#method.post_visit_query" class="fn">post_visit_query</a>(&amp;mut self, _query: &amp;Query) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any queries that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_relation" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_relation" class="fn">pre_visit_relation</a>(
&amp;mut self,
_relation: &amp;<a class="struct" href="../convert/struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any relations (e.g. tables) that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_relation" class="method"><h4 class="code-header">fn <a href="#method.post_visit_relation" class="fn">post_visit_relation</a>(
&amp;mut self,
_relation: &amp;<a class="struct" href="../convert/struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any relations (e.g. tables) that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_table_factor" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_table_factor" class="fn">pre_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any table factors that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_table_factor" class="method"><h4 class="code-header">fn <a href="#method.post_visit_table_factor" class="fn">post_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any table factors that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_expr" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_expr" class="fn">pre_visit_expr</a>(&amp;mut self, _expr: &amp;<a class="enum" href="../convert/enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any expressions that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_expr" class="method"><h4 class="code-header">fn <a href="#method.post_visit_expr" class="fn">post_visit_expr</a>(&amp;mut self, _expr: &amp;<a class="enum" href="../convert/enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any expressions that appear in the AST</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_statement" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_statement" class="fn">pre_visit_statement</a>(
&amp;mut self,
_statement: &amp;Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any statements that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_statement" class="method"><h4 class="code-header">fn <a href="#method.post_visit_statement" class="fn">post_visit_statement</a>(
&amp;mut self,
_statement: &amp;Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any statements that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_value" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_value" class="fn">pre_visit_value</a>(&amp;mut self, _value: &amp;<a class="enum" href="../convert/enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any Value that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_value" class="method"><h4 class="code-header">fn <a href="#method.post_visit_value" class="fn">post_visit_value</a>(&amp;mut self, _value: &amp;<a class="enum" href="../convert/enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.Visitor.html#associatedtype.Break" title="type common_sql::convert::Visitor::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any Value that appear in the AST after visiting children</p>
</div></details></div><h2 id="implementors" class="section-header">Implementors<a href="#implementors" class="anchor">§</a></h2><div id="implementors-list"></div><script src="../../trait.impl/sqlparser/ast/visitor/trait.Visitor.js" async></script></section></div></main></body></html>

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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="A visitor that can be used to mutate an AST tree."><title>VisitorMut in common_sql::default_constraint - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc trait"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">VisitorMut</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Visitor<wbr>Mut</a></h2><h3><a href="#">Sections</a></h3><ul class="block top-toc"><li><a href="#see-also" title="See also">See also</a></li><li><a href="#example" title="Example">Example</a></li></ul><h3><a href="#required-associated-types">Required Associated Types</a></h3><ul class="block"><li><a href="#associatedtype.Break" title="Break">Break</a></li></ul><h3><a href="#provided-methods">Provided Methods</a></h3><ul class="block"><li><a href="#method.post_visit_expr" title="post_visit_expr">post_visit_expr</a></li><li><a href="#method.post_visit_query" title="post_visit_query">post_visit_query</a></li><li><a href="#method.post_visit_relation" title="post_visit_relation">post_visit_relation</a></li><li><a href="#method.post_visit_statement" title="post_visit_statement">post_visit_statement</a></li><li><a href="#method.post_visit_table_factor" title="post_visit_table_factor">post_visit_table_factor</a></li><li><a href="#method.post_visit_value" title="post_visit_value">post_visit_value</a></li><li><a href="#method.pre_visit_expr" title="pre_visit_expr">pre_visit_expr</a></li><li><a href="#method.pre_visit_query" title="pre_visit_query">pre_visit_query</a></li><li><a href="#method.pre_visit_relation" title="pre_visit_relation">pre_visit_relation</a></li><li><a href="#method.pre_visit_statement" title="pre_visit_statement">pre_visit_statement</a></li><li><a href="#method.pre_visit_table_factor" title="pre_visit_table_factor">pre_visit_table_factor</a></li><li><a href="#method.pre_visit_value" title="pre_visit_value">pre_visit_value</a></li></ul><h3><a href="#implementors">Implementors</a></h3></section><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>default_<wbr>constraint</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">default_constraint</a></div><h1>Trait <span class="trait">Visitor<wbr>Mut</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"></span></div><pre class="rust item-decl"><code>pub trait VisitorMut {
type <a href="#associatedtype.Break" class="associatedtype">Break</a>;
// Provided methods
fn <a href="#method.pre_visit_query" class="fn">pre_visit_query</a>(
&amp;mut self,
_query: &amp;mut Query,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_query" class="fn">post_visit_query</a>(
&amp;mut self,
_query: &amp;mut Query,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_relation" class="fn">pre_visit_relation</a>(
&amp;mut self,
_relation: &amp;mut <a class="struct" href="../convert/struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_relation" class="fn">post_visit_relation</a>(
&amp;mut self,
_relation: &amp;mut <a class="struct" href="../convert/struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_table_factor" class="fn">pre_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;mut TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_table_factor" class="fn">post_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;mut TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_expr" class="fn">pre_visit_expr</a>(&amp;mut self, _expr: &amp;mut <a class="enum" href="../convert/enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_expr" class="fn">post_visit_expr</a>(&amp;mut self, _expr: &amp;mut <a class="enum" href="../convert/enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_statement" class="fn">pre_visit_statement</a>(
&amp;mut self,
_statement: &amp;mut Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_statement" class="fn">post_visit_statement</a>(
&amp;mut self,
_statement: &amp;mut Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.pre_visit_value" class="fn">pre_visit_value</a>(
&amp;mut self,
_value: &amp;mut <a class="enum" href="../convert/enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
<span class="item-spacer"></span> fn <a href="#method.post_visit_value" class="fn">post_visit_value</a>(
&amp;mut self,
_value: &amp;mut <a class="enum" href="../convert/enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt; { ... }
}</code></pre><details class="toggle top-doc" open><summary class="hideme"><span>Expand description</span></summary><div class="docblock"><p>A visitor that can be used to mutate an AST tree.</p>
<p><code>pre_visit_</code> methods are invoked before visiting all children of the
node and <code>post_visit_</code> methods are invoked after visiting all
children of the node.</p>
<h2 id="see-also"><a class="doc-anchor" href="#see-also">§</a>See also</h2>
<p>These methods provide a more concise way of visiting nodes of a certain type:</p>
<ul>
<li>[visit_relations_mut]</li>
<li><a href="../convert/fn.visit_expressions_mut.html" title="fn common_sql::convert::visit_expressions_mut">visit_expressions_mut</a></li>
<li><a href="../convert/fn.visit_statements_mut.html" title="fn common_sql::convert::visit_statements_mut">visit_statements_mut</a></li>
</ul>
<h2 id="example"><a class="doc-anchor" href="#example">§</a>Example</h2>
<div class="example-wrap"><pre class="rust rust-example-rendered"><code>
<span class="comment">// A visitor that replaces "to_replace" with "replaced" in all expressions
</span><span class="kw">struct </span>Replacer;
<span class="comment">// Visit each expression after its children have been visited
</span><span class="kw">impl </span>VisitorMut <span class="kw">for </span>Replacer {
<span class="kw">type </span>Break = ();
<span class="kw">fn </span>post_visit_expr(<span class="kw-2">&amp;mut </span><span class="self">self</span>, expr: <span class="kw-2">&amp;mut </span>Expr) -&gt; ControlFlow&lt;<span class="self">Self</span>::Break&gt; {
<span class="kw">if let </span>Expr::Identifier(Ident{ value, ..}) = expr {
<span class="kw-2">*</span>value = value.replace(<span class="string">"to_replace"</span>, <span class="string">"replaced"</span>)
}
ControlFlow::Continue(())
}
}
<span class="kw">let </span>sql = <span class="string">"SELECT to_replace FROM foo where to_replace IN (SELECT to_replace FROM bar)"</span>;
<span class="kw">let </span><span class="kw-2">mut </span>statements = Parser::parse_sql(<span class="kw-2">&amp;</span>GenericDialect{}, sql).unwrap();
<span class="comment">// Drive the visitor through the AST
</span>statements.visit(<span class="kw-2">&amp;mut </span>Replacer);
<span class="macro">assert_eq!</span>(statements[<span class="number">0</span>].to_string(), <span class="string">"SELECT replaced FROM foo WHERE replaced IN (SELECT replaced FROM bar)"</span>);</code></pre></div></div></details><h2 id="required-associated-types" class="section-header">Required Associated Types<a href="#required-associated-types" class="anchor">§</a></h2><div class="methods"><details class="toggle" open><summary><section id="associatedtype.Break" class="method"><h4 class="code-header">type <a href="#associatedtype.Break" class="associatedtype">Break</a></h4></section></summary><div class="docblock"><p>Type returned when the recursion returns early.</p>
</div></details></div><h2 id="provided-methods" class="section-header">Provided Methods<a href="#provided-methods" class="anchor">§</a></h2><div class="methods"><details class="toggle method-toggle" open><summary><section id="method.pre_visit_query" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_query" class="fn">pre_visit_query</a>(&amp;mut self, _query: &amp;mut Query) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any queries that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_query" class="method"><h4 class="code-header">fn <a href="#method.post_visit_query" class="fn">post_visit_query</a>(&amp;mut self, _query: &amp;mut Query) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any queries that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_relation" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_relation" class="fn">pre_visit_relation</a>(
&amp;mut self,
_relation: &amp;mut <a class="struct" href="../convert/struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any relations (e.g. tables) that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_relation" class="method"><h4 class="code-header">fn <a href="#method.post_visit_relation" class="fn">post_visit_relation</a>(
&amp;mut self,
_relation: &amp;mut <a class="struct" href="../convert/struct.ObjectName.html" title="struct common_sql::convert::ObjectName">ObjectName</a>,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any relations (e.g. tables) that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_table_factor" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_table_factor" class="fn">pre_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;mut TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any table factors that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_table_factor" class="method"><h4 class="code-header">fn <a href="#method.post_visit_table_factor" class="fn">post_visit_table_factor</a>(
&amp;mut self,
_table_factor: &amp;mut TableFactor,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any table factors that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_expr" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_expr" class="fn">pre_visit_expr</a>(&amp;mut self, _expr: &amp;mut <a class="enum" href="../convert/enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any expressions that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_expr" class="method"><h4 class="code-header">fn <a href="#method.post_visit_expr" class="fn">post_visit_expr</a>(&amp;mut self, _expr: &amp;mut <a class="enum" href="../convert/enum.Expr.html" title="enum common_sql::convert::Expr">Expr</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any expressions that appear in the AST</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_statement" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_statement" class="fn">pre_visit_statement</a>(
&amp;mut self,
_statement: &amp;mut Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any statements that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_statement" class="method"><h4 class="code-header">fn <a href="#method.post_visit_statement" class="fn">post_visit_statement</a>(
&amp;mut self,
_statement: &amp;mut Statement,
) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any statements that appear in the AST after visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.pre_visit_value" class="method"><h4 class="code-header">fn <a href="#method.pre_visit_value" class="fn">pre_visit_value</a>(&amp;mut self, _value: &amp;mut <a class="enum" href="../convert/enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any value that appear in the AST before visiting children</p>
</div></details><details class="toggle method-toggle" open><summary><section id="method.post_visit_value" class="method"><h4 class="code-header">fn <a href="#method.post_visit_value" class="fn">post_visit_value</a>(&amp;mut self, _value: &amp;mut <a class="enum" href="../convert/enum.SqlValue.html" title="enum common_sql::convert::SqlValue">Value</a>) -&gt; <a class="enum" href="https://doc.rust-lang.org/nightly/core/ops/control_flow/enum.ControlFlow.html" title="enum core::ops::control_flow::ControlFlow">ControlFlow</a>&lt;Self::<a class="associatedtype" href="../convert/trait.VisitorMut.html#associatedtype.Break" title="type common_sql::convert::VisitorMut::Break">Break</a>&gt;</h4></section></summary><div class="docblock"><p>Invoked for any statements that appear in the AST after visiting children</p>
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<!DOCTYPE html><html lang="en"><head><meta charset="utf-8"><meta name="viewport" content="width=device-width, initial-scale=1.0"><meta name="generator" content="rustdoc"><meta name="description" content="API documentation for the Rust `Result` type in crate `common_sql`."><title>Result in common_sql::error - Rust</title><script>if(window.location.protocol!=="file:")document.head.insertAdjacentHTML("beforeend","SourceSerif4-Regular-6b053e98.ttf.woff2,FiraSans-Italic-81dc35de.woff2,FiraSans-Regular-0fe48ade.woff2,FiraSans-MediumItalic-ccf7e434.woff2,FiraSans-Medium-e1aa3f0a.woff2,SourceCodePro-Regular-8badfe75.ttf.woff2,SourceCodePro-Semibold-aa29a496.ttf.woff2".split(",").map(f=>`<link rel="preload" as="font" type="font/woff2"href="../../static.files/${f}">`).join(""))</script><link rel="stylesheet" href="../../static.files/normalize-9960930a.css"><link rel="stylesheet" href="../../static.files/rustdoc-e56847b5.css"><meta name="rustdoc-vars" data-root-path="../../" data-static-root-path="../../static.files/" data-current-crate="common_sql" data-themes="" data-resource-suffix="" data-rustdoc-version="1.92.0-nightly (fa3155a64 2025-09-30)" data-channel="nightly" data-search-js="search-e256b49e.js" data-stringdex-js="stringdex-828709d0.js" data-settings-js="settings-c38705f0.js" ><script src="../../static.files/storage-e2aeef58.js"></script><script defer src="sidebar-items.js"></script><script defer src="../../static.files/main-ce535bd0.js"></script><noscript><link rel="stylesheet" href="../../static.files/noscript-263c88ec.css"></noscript><link rel="alternate icon" type="image/png" href="../../static.files/favicon-32x32-eab170b8.png"><link rel="icon" type="image/svg+xml" href="../../static.files/favicon-044be391.svg"></head><body class="rustdoc type"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><rustdoc-topbar><h2><a href="#">Result</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../common_sql/index.html">common_<wbr>sql</a><span class="version">1.0.0-beta.3</span></h2></div><div class="sidebar-elems"><section id="rustdoc-toc"><h2 class="location"><a href="#">Result</a></h2><h3><a href="#aliased-type">Aliased Type</a></h3><h3><a href="#variants">Variants</a></h3><ul class="block variant"><li><a href="#variant.Err" title="Err">Err</a></li><li><a href="#variant.Ok" title="Ok">Ok</a></li></ul></section><div id="rustdoc-modnav"><h2><a href="index.html">In common_<wbr>sql::<wbr>error</a></h2></div></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><div class="width-limiter"><section id="main-content" class="content"><div class="main-heading"><div class="rustdoc-breadcrumbs"><a href="../index.html">common_sql</a>::<wbr><a href="index.html">error</a></div><h1>Type Alias <span class="type">Result</span>&nbsp;<button id="copy-path" title="Copy item path to clipboard">Copy item path</button></h1><rustdoc-toolbar></rustdoc-toolbar><span class="sub-heading"><a class="src" href="../../src/common_sql/error.rs.html#27">Source</a> </span></div><pre class="rust item-decl"><code>pub type Result&lt;T&gt; = <a class="enum" href="https://doc.rust-lang.org/nightly/core/result/enum.Result.html" title="enum core::result::Result">Result</a>&lt;T, <a class="enum" href="enum.Error.html" title="enum common_sql::error::Error">Error</a>&gt;;</code></pre><h2 id="aliased-type" class="section-header">Aliased Type<a href="#aliased-type" class="anchor">§</a></h2><pre class="rust item-decl"><code>pub enum Result&lt;T&gt; {
Ok(T),
Err(<a class="enum" href="enum.Error.html" title="enum common_sql::error::Error">Error</a>),
}</code></pre><h2 id="variants" class="variants section-header">Variants<a href="#variants" class="anchor">§</a></h2><div class="variants"><section id="variant.Ok" class="variant"><a href="#variant.Ok" class="anchor">§</a><span class="since rightside" title="Stable since Rust version 1.0.0">1.0.0</span><h3 class="code-header">Ok(T)</h3></section><div class="docblock"><p>Contains the success value</p>
</div><section id="variant.Err" class="variant"><a href="#variant.Err" class="anchor">§</a><span class="since rightside" title="Stable since Rust version 1.0.0">1.0.0</span><h3 class="code-header">Err(<a class="enum" href="enum.Error.html" title="enum common_sql::error::Error">Error</a>)</h3></section><div class="docblock"><p>Contains the error value</p>
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