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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 `instance` mod in crate `frontend`."><title>frontend::instance - 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="frontend" 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 mod"><!--[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="#">Module instance</a></h2></rustdoc-topbar><nav class="sidebar"><div class="sidebar-crate"><h2><a href="../../frontend/index.html">frontend</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="#">Module instance</a></h2><h3><a href="#reexports">Module Items</a></h3><ul class="block"><li><a href="#reexports" title="Re-exports">Re-exports</a></li><li><a href="#modules" title="Modules">Modules</a></li><li><a href="#macros" title="Macros">Macros</a></li><li><a href="#structs" title="Structs">Structs</a></li><li><a href="#functions" title="Functions">Functions</a></li></ul></section><div id="rustdoc-modnav"><h2 class="in-crate"><a href="../index.html">In crate frontend</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">frontend</a></div><h1>Module <span>instance</span> <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/frontend/instance.rs.html#15-1328">Source</a> </span></div><h2 id="reexports" class="section-header">Re-exports<a href="#reexports" class="anchor">§</a></h2><dl class="item-table reexports"><dt id="reexport.StandaloneDatanodeManager"><code>pub use standalone::<a class="struct" href="standalone/struct.StandaloneDatanodeManager.html" title="struct frontend::instance::standalone::StandaloneDatanodeManager">StandaloneDatanodeManager</a>;</code></dt></dl><h2 id="modules" class="section-header">Modules<a href="#modules" class="anchor">§</a></h2><dl class="item-table"><dt><a class="mod" href="builder/index.html" title="mod frontend::instance::builder">builder</a></dt><dt><a class="mod" href="grpc/index.html" title="mod frontend::instance::grpc">grpc</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="mod" href="influxdb/index.html" title="mod frontend::instance::influxdb">influxdb</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="mod" href="jaeger/index.html" title="mod frontend::instance::jaeger">jaeger</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="mod" href="log_handler/index.html" title="mod frontend::instance::log_handler">log_<wbr>handler</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="mod" href="logs/index.html" title="mod frontend::instance::logs">logs</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="mod" href="opentsdb/index.html" title="mod frontend::instance::opentsdb">opentsdb</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="mod" href="otlp/index.html" title="mod frontend::instance::otlp">otlp</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="mod" href="prom_store/index.html" title="mod frontend::instance::prom_store">prom_<wbr>store</a></dt><dt><a class="mod" href="promql/index.html" title="mod frontend::instance::promql">promql</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="mod" href="region_query/index.html" title="mod frontend::instance::region_query">region_<wbr>query</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="mod" href="standalone/index.html" title="mod frontend::instance::standalone">standalone</a></dt></dl><h2 id="macros" class="section-header">Macros<a href="#macros" class="anchor">§</a></h2><dl class="item-table"><dt><a class="macro" href="macro.validate_db_permission.html" title="macro frontend::instance::validate_db_permission">validate_<wbr>db_<wbr>permission</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>Validate <code>stmt.database</code> permission if it’s presented.</dd></dl><h2 id="structs" class="section-header">Structs<a href="#structs" class="anchor">§</a></h2><dl class="item-table"><dt><a class="struct" href="struct.Instance.html" title="struct frontend::instance::Instance">Instance</a></dt><dd>The frontend instance contains necessary components, and implements many
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traits, like <a href="../../servers/query_handler/grpc/trait.GrpcQueryHandler.html" title="trait servers::query_handler::grpc::GrpcQueryHandler"><code>servers::query_handler::grpc::GrpcQueryHandler</code></a>,
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<a href="../../servers/query_handler/sql/trait.SqlQueryHandler.html" title="trait servers::query_handler::sql::SqlQueryHandler"><code>servers::query_handler::sql::SqlQueryHandler</code></a>, etc.</dd><dt><a class="struct" href="struct.OTLP_LEGACY_DEFAULT_VALUE.html" title="struct frontend::instance::OTLP_LEGACY_DEFAULT_VALUE">OTLP_<wbr>LEGACY_<wbr>DEFAULT_<wbr>VALUE</a><span title="Restricted Visibility"> 🔒</span> </dt></dl><h2 id="functions" class="section-header">Functions<a href="#functions" class="anchor">§</a></h2><dl class="item-table"><dt><a class="fn" href="fn.attach_timeout.html" title="fn frontend::instance::attach_timeout">attach_<wbr>timeout</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.attach_timer.html" title="fn frontend::instance::attach_timer">attach_<wbr>timer</a></dt><dd>Attaches a timer to the output and observes it once the output is exhausted.</dd><dt><a class="fn" href="fn.check_permission.html" title="fn frontend::instance::check_permission">check_<wbr>permission</a></dt><dt><a class="fn" href="fn.derive_timeout.html" title="fn frontend::instance::derive_timeout">derive_<wbr>timeout</a><span title="Restricted Visibility"> 🔒</span> </dt><dd>If the relevant variables are set, the timeout is enforced for all PostgreSQL statements.
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For MySQL, it applies only to read-only statements.</dd><dt><a class="fn" href="fn.fast_legacy_check.html" title="fn frontend::instance::fast_legacy_check">fast_<wbr>legacy_<wbr>check</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.parse_stmt.html" title="fn frontend::instance::parse_stmt">parse_<wbr>stmt</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.should_capture_statement.html" title="fn frontend::instance::should_capture_statement">should_<wbr>capture_<wbr>statement</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.validate_database.html" title="fn frontend::instance::validate_database">validate_<wbr>database</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.validate_flow.html" title="fn frontend::instance::validate_flow">validate_<wbr>flow</a><span title="Restricted Visibility"> 🔒</span> </dt><dt><a class="fn" href="fn.validate_param.html" title="fn frontend::instance::validate_param">validate_<wbr>param</a><span title="Restricted Visibility"> 🔒</span> </dt></dl></section></div></main></body></html> |