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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="Source of the Rust file `src/common/function/src/scalars/string/insert.rs`."><title>insert.rs - source</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_function" 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="../../../../static.files/src-script-813739b1.js"></script><script defer src="../../../../src-files.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 src"><!--[if lte IE 11]><div class="warning">This old browser is unsupported and will most likely display funky things.</div><![endif]--><nav class="sidebar"><div class="src-sidebar-title"><h2>Files</h2></div></nav><div class="sidebar-resizer" title="Drag to resize sidebar"></div><main><section id="main-content" class="content"><div class="main-heading"><h1><div class="sub-heading">common_function/scalars/string/</div>insert.rs</h1><rustdoc-toolbar></rustdoc-toolbar></div><div class="example-wrap digits-3"><pre class="rust"><code><a href=#1 id=1 data-nosnippet>1</a><span class="comment">// Copyright 2023 Greptime Team
<a href=#2 id=2 data-nosnippet>2</a>//
<a href=#3 id=3 data-nosnippet>3</a>// Licensed under the Apache License, Version 2.0 (the "License");
<a href=#4 id=4 data-nosnippet>4</a>// you may not use this file except in compliance with the License.
<a href=#5 id=5 data-nosnippet>5</a>// You may obtain a copy of the License at
<a href=#6 id=6 data-nosnippet>6</a>//
<a href=#7 id=7 data-nosnippet>7</a>// http://www.apache.org/licenses/LICENSE-2.0
<a href=#8 id=8 data-nosnippet>8</a>//
<a href=#9 id=9 data-nosnippet>9</a>// Unless required by applicable law or agreed to in writing, software
<a href=#10 id=10 data-nosnippet>10</a>// distributed under the License is distributed on an "AS IS" BASIS,
<a href=#11 id=11 data-nosnippet>11</a>// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<a href=#12 id=12 data-nosnippet>12</a>// See the License for the specific language governing permissions and
<a href=#13 id=13 data-nosnippet>13</a>// limitations under the License.
<a href=#14 id=14 data-nosnippet>14</a>
<a href=#15 id=15 data-nosnippet>15</a></span><span class="doccomment">//! MySQL-compatible INSERT function implementation.
<a href=#16 id=16 data-nosnippet>16</a>//!
<a href=#17 id=17 data-nosnippet>17</a>//! INSERT(str, pos, len, newstr) - Inserts newstr into str at position pos,
<a href=#18 id=18 data-nosnippet>18</a>//! replacing len characters.
<a href=#19 id=19 data-nosnippet>19</a>
<a href=#20 id=20 data-nosnippet>20</a></span><span class="kw">use </span>std::fmt;
<a href=#21 id=21 data-nosnippet>21</a><span class="kw">use </span>std::sync::Arc;
<a href=#22 id=22 data-nosnippet>22</a>
<a href=#23 id=23 data-nosnippet>23</a><span class="kw">use </span>datafusion_common::DataFusionError;
<a href=#24 id=24 data-nosnippet>24</a><span class="kw">use </span>datafusion_common::arrow::array::{Array, ArrayRef, AsArray, LargeStringBuilder};
<a href=#25 id=25 data-nosnippet>25</a><span class="kw">use </span>datafusion_common::arrow::compute::cast;
<a href=#26 id=26 data-nosnippet>26</a><span class="kw">use </span>datafusion_common::arrow::datatypes::DataType;
<a href=#27 id=27 data-nosnippet>27</a><span class="kw">use </span>datafusion_expr::{ColumnarValue, ScalarFunctionArgs, Signature, TypeSignature, Volatility};
<a href=#28 id=28 data-nosnippet>28</a>
<a href=#29 id=29 data-nosnippet>29</a><span class="kw">use </span><span class="kw">crate</span>::function::Function;
<a href=#30 id=30 data-nosnippet>30</a><span class="kw">use </span><span class="kw">crate</span>::function_registry::FunctionRegistry;
<a href=#31 id=31 data-nosnippet>31</a>
<a href=#32 id=32 data-nosnippet>32</a><span class="kw">const </span>NAME: <span class="kw-2">&amp;</span>str = <span class="string">"insert"</span>;
<a href=#33 id=33 data-nosnippet>33</a>
<a href=#34 id=34 data-nosnippet>34</a><span class="doccomment">/// MySQL-compatible INSERT function.
<a href=#35 id=35 data-nosnippet>35</a>///
<a href=#36 id=36 data-nosnippet>36</a>/// Syntax: INSERT(str, pos, len, newstr)
<a href=#37 id=37 data-nosnippet>37</a>/// Returns str with the substring beginning at position pos and len characters long
<a href=#38 id=38 data-nosnippet>38</a>/// replaced by newstr.
<a href=#39 id=39 data-nosnippet>39</a>///
<a href=#40 id=40 data-nosnippet>40</a>/// - pos is 1-based
<a href=#41 id=41 data-nosnippet>41</a>/// - If pos is out of range, returns the original string
<a href=#42 id=42 data-nosnippet>42</a>/// - If len is out of range, replaces from pos to end of string
<a href=#43 id=43 data-nosnippet>43</a></span><span class="attr">#[derive(Debug)]
<a href=#44 id=44 data-nosnippet>44</a></span><span class="kw">pub struct </span>InsertFunction {
<a href=#45 id=45 data-nosnippet>45</a> signature: Signature,
<a href=#46 id=46 data-nosnippet>46</a>}
<a href=#47 id=47 data-nosnippet>47</a>
<a href=#48 id=48 data-nosnippet>48</a><span class="kw">impl </span>InsertFunction {
<a href=#49 id=49 data-nosnippet>49</a> <span class="kw">pub fn </span>register(registry: <span class="kw-2">&amp;</span>FunctionRegistry) {
<a href=#50 id=50 data-nosnippet>50</a> registry.register_scalar(InsertFunction::default());
<a href=#51 id=51 data-nosnippet>51</a> }
<a href=#52 id=52 data-nosnippet>52</a>}
<a href=#53 id=53 data-nosnippet>53</a>
<a href=#54 id=54 data-nosnippet>54</a><span class="kw">impl </span>Default <span class="kw">for </span>InsertFunction {
<a href=#55 id=55 data-nosnippet>55</a> <span class="kw">fn </span>default() -&gt; <span class="self">Self </span>{
<a href=#56 id=56 data-nosnippet>56</a> <span class="kw">let </span><span class="kw-2">mut </span>signatures = Vec::new();
<a href=#57 id=57 data-nosnippet>57</a> <span class="kw">let </span>string_types = [DataType::Utf8, DataType::LargeUtf8, DataType::Utf8View];
<a href=#58 id=58 data-nosnippet>58</a> <span class="kw">let </span>int_types = [
<a href=#59 id=59 data-nosnippet>59</a> DataType::Int64,
<a href=#60 id=60 data-nosnippet>60</a> DataType::Int32,
<a href=#61 id=61 data-nosnippet>61</a> DataType::Int16,
<a href=#62 id=62 data-nosnippet>62</a> DataType::Int8,
<a href=#63 id=63 data-nosnippet>63</a> DataType::UInt64,
<a href=#64 id=64 data-nosnippet>64</a> DataType::UInt32,
<a href=#65 id=65 data-nosnippet>65</a> DataType::UInt16,
<a href=#66 id=66 data-nosnippet>66</a> DataType::UInt8,
<a href=#67 id=67 data-nosnippet>67</a> ];
<a href=#68 id=68 data-nosnippet>68</a>
<a href=#69 id=69 data-nosnippet>69</a> <span class="kw">for </span>str_type <span class="kw">in </span><span class="kw-2">&amp;</span>string_types {
<a href=#70 id=70 data-nosnippet>70</a> <span class="kw">for </span>newstr_type <span class="kw">in </span><span class="kw-2">&amp;</span>string_types {
<a href=#71 id=71 data-nosnippet>71</a> <span class="kw">for </span>pos_type <span class="kw">in </span><span class="kw-2">&amp;</span>int_types {
<a href=#72 id=72 data-nosnippet>72</a> <span class="kw">for </span>len_type <span class="kw">in </span><span class="kw-2">&amp;</span>int_types {
<a href=#73 id=73 data-nosnippet>73</a> signatures.push(TypeSignature::Exact(<span class="macro">vec!</span>[
<a href=#74 id=74 data-nosnippet>74</a> str_type.clone(),
<a href=#75 id=75 data-nosnippet>75</a> pos_type.clone(),
<a href=#76 id=76 data-nosnippet>76</a> len_type.clone(),
<a href=#77 id=77 data-nosnippet>77</a> newstr_type.clone(),
<a href=#78 id=78 data-nosnippet>78</a> ]));
<a href=#79 id=79 data-nosnippet>79</a> }
<a href=#80 id=80 data-nosnippet>80</a> }
<a href=#81 id=81 data-nosnippet>81</a> }
<a href=#82 id=82 data-nosnippet>82</a> }
<a href=#83 id=83 data-nosnippet>83</a>
<a href=#84 id=84 data-nosnippet>84</a> <span class="self">Self </span>{
<a href=#85 id=85 data-nosnippet>85</a> signature: Signature::one_of(signatures, Volatility::Immutable),
<a href=#86 id=86 data-nosnippet>86</a> }
<a href=#87 id=87 data-nosnippet>87</a> }
<a href=#88 id=88 data-nosnippet>88</a>}
<a href=#89 id=89 data-nosnippet>89</a>
<a href=#90 id=90 data-nosnippet>90</a><span class="kw">impl </span>fmt::Display <span class="kw">for </span>InsertFunction {
<a href=#91 id=91 data-nosnippet>91</a> <span class="kw">fn </span>fmt(<span class="kw-2">&amp;</span><span class="self">self</span>, f: <span class="kw-2">&amp;mut </span>fmt::Formatter) -&gt; fmt::Result {
<a href=#92 id=92 data-nosnippet>92</a> <span class="macro">write!</span>(f, <span class="string">"{}"</span>, NAME.to_ascii_uppercase())
<a href=#93 id=93 data-nosnippet>93</a> }
<a href=#94 id=94 data-nosnippet>94</a>}
<a href=#95 id=95 data-nosnippet>95</a>
<a href=#96 id=96 data-nosnippet>96</a><span class="kw">impl </span>Function <span class="kw">for </span>InsertFunction {
<a href=#97 id=97 data-nosnippet>97</a> <span class="kw">fn </span>name(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="kw-2">&amp;</span>str {
<a href=#98 id=98 data-nosnippet>98</a> NAME
<a href=#99 id=99 data-nosnippet>99</a> }
<a href=#100 id=100 data-nosnippet>100</a>
<a href=#101 id=101 data-nosnippet>101</a> <span class="kw">fn </span>return_type(<span class="kw-2">&amp;</span><span class="self">self</span>, <span class="kw">_</span>: <span class="kw-2">&amp;</span>[DataType]) -&gt; datafusion_common::Result&lt;DataType&gt; {
<a href=#102 id=102 data-nosnippet>102</a> <span class="prelude-val">Ok</span>(DataType::LargeUtf8)
<a href=#103 id=103 data-nosnippet>103</a> }
<a href=#104 id=104 data-nosnippet>104</a>
<a href=#105 id=105 data-nosnippet>105</a> <span class="kw">fn </span>signature(<span class="kw-2">&amp;</span><span class="self">self</span>) -&gt; <span class="kw-2">&amp;</span>Signature {
<a href=#106 id=106 data-nosnippet>106</a> <span class="kw-2">&amp;</span><span class="self">self</span>.signature
<a href=#107 id=107 data-nosnippet>107</a> }
<a href=#108 id=108 data-nosnippet>108</a>
<a href=#109 id=109 data-nosnippet>109</a> <span class="kw">fn </span>invoke_with_args(
<a href=#110 id=110 data-nosnippet>110</a> <span class="kw-2">&amp;</span><span class="self">self</span>,
<a href=#111 id=111 data-nosnippet>111</a> args: ScalarFunctionArgs,
<a href=#112 id=112 data-nosnippet>112</a> ) -&gt; datafusion_common::Result&lt;ColumnarValue&gt; {
<a href=#113 id=113 data-nosnippet>113</a> <span class="kw">if </span>args.args.len() != <span class="number">4 </span>{
<a href=#114 id=114 data-nosnippet>114</a> <span class="kw">return </span><span class="prelude-val">Err</span>(DataFusionError::Execution(
<a href=#115 id=115 data-nosnippet>115</a> <span class="string">"INSERT requires exactly 4 arguments: INSERT(str, pos, len, newstr)"</span>.to_string(),
<a href=#116 id=116 data-nosnippet>116</a> ));
<a href=#117 id=117 data-nosnippet>117</a> }
<a href=#118 id=118 data-nosnippet>118</a>
<a href=#119 id=119 data-nosnippet>119</a> <span class="kw">let </span>arrays = ColumnarValue::values_to_arrays(<span class="kw-2">&amp;</span>args.args)<span class="question-mark">?</span>;
<a href=#120 id=120 data-nosnippet>120</a> <span class="kw">let </span>len = arrays[<span class="number">0</span>].len();
<a href=#121 id=121 data-nosnippet>121</a>
<a href=#122 id=122 data-nosnippet>122</a> <span class="comment">// Cast string arguments to LargeUtf8
<a href=#123 id=123 data-nosnippet>123</a> </span><span class="kw">let </span>str_array = cast_to_large_utf8(<span class="kw-2">&amp;</span>arrays[<span class="number">0</span>], <span class="string">"str"</span>)<span class="question-mark">?</span>;
<a href=#124 id=124 data-nosnippet>124</a> <span class="kw">let </span>newstr_array = cast_to_large_utf8(<span class="kw-2">&amp;</span>arrays[<span class="number">3</span>], <span class="string">"newstr"</span>)<span class="question-mark">?</span>;
<a href=#125 id=125 data-nosnippet>125</a> <span class="kw">let </span>pos_array = cast_to_int64(<span class="kw-2">&amp;</span>arrays[<span class="number">1</span>], <span class="string">"pos"</span>)<span class="question-mark">?</span>;
<a href=#126 id=126 data-nosnippet>126</a> <span class="kw">let </span>replace_len_array = cast_to_int64(<span class="kw-2">&amp;</span>arrays[<span class="number">2</span>], <span class="string">"len"</span>)<span class="question-mark">?</span>;
<a href=#127 id=127 data-nosnippet>127</a>
<a href=#128 id=128 data-nosnippet>128</a> <span class="kw">let </span>str_arr = str_array.as_string::&lt;i64&gt;();
<a href=#129 id=129 data-nosnippet>129</a> <span class="kw">let </span>pos_arr = pos_array.as_primitive::&lt;datafusion_common::arrow::datatypes::Int64Type&gt;();
<a href=#130 id=130 data-nosnippet>130</a> <span class="kw">let </span>len_arr =
<a href=#131 id=131 data-nosnippet>131</a> replace_len_array.as_primitive::&lt;datafusion_common::arrow::datatypes::Int64Type&gt;();
<a href=#132 id=132 data-nosnippet>132</a> <span class="kw">let </span>newstr_arr = newstr_array.as_string::&lt;i64&gt;();
<a href=#133 id=133 data-nosnippet>133</a>
<a href=#134 id=134 data-nosnippet>134</a> <span class="kw">let </span><span class="kw-2">mut </span>builder = LargeStringBuilder::with_capacity(len, len * <span class="number">32</span>);
<a href=#135 id=135 data-nosnippet>135</a>
<a href=#136 id=136 data-nosnippet>136</a> <span class="kw">for </span>i <span class="kw">in </span><span class="number">0</span>..len {
<a href=#137 id=137 data-nosnippet>137</a> <span class="comment">// Check for NULLs
<a href=#138 id=138 data-nosnippet>138</a> </span><span class="kw">if </span>str_arr.is_null(i)
<a href=#139 id=139 data-nosnippet>139</a> || pos_array.is_null(i)
<a href=#140 id=140 data-nosnippet>140</a> || replace_len_array.is_null(i)
<a href=#141 id=141 data-nosnippet>141</a> || newstr_arr.is_null(i)
<a href=#142 id=142 data-nosnippet>142</a> {
<a href=#143 id=143 data-nosnippet>143</a> builder.append_null();
<a href=#144 id=144 data-nosnippet>144</a> <span class="kw">continue</span>;
<a href=#145 id=145 data-nosnippet>145</a> }
<a href=#146 id=146 data-nosnippet>146</a>
<a href=#147 id=147 data-nosnippet>147</a> <span class="kw">let </span>original = str_arr.value(i);
<a href=#148 id=148 data-nosnippet>148</a> <span class="kw">let </span>pos = pos_arr.value(i);
<a href=#149 id=149 data-nosnippet>149</a> <span class="kw">let </span>replace_len = len_arr.value(i);
<a href=#150 id=150 data-nosnippet>150</a> <span class="kw">let </span>new_str = newstr_arr.value(i);
<a href=#151 id=151 data-nosnippet>151</a>
<a href=#152 id=152 data-nosnippet>152</a> <span class="kw">let </span>result = insert_string(original, pos, replace_len, new_str);
<a href=#153 id=153 data-nosnippet>153</a> builder.append_value(<span class="kw-2">&amp;</span>result);
<a href=#154 id=154 data-nosnippet>154</a> }
<a href=#155 id=155 data-nosnippet>155</a>
<a href=#156 id=156 data-nosnippet>156</a> <span class="prelude-val">Ok</span>(ColumnarValue::Array(Arc::new(builder.finish())))
<a href=#157 id=157 data-nosnippet>157</a> }
<a href=#158 id=158 data-nosnippet>158</a>}
<a href=#159 id=159 data-nosnippet>159</a>
<a href=#160 id=160 data-nosnippet>160</a><span class="doccomment">/// Cast array to LargeUtf8 for uniform string access.
<a href=#161 id=161 data-nosnippet>161</a></span><span class="kw">fn </span>cast_to_large_utf8(array: <span class="kw-2">&amp;</span>ArrayRef, name: <span class="kw-2">&amp;</span>str) -&gt; datafusion_common::Result&lt;ArrayRef&gt; {
<a href=#162 id=162 data-nosnippet>162</a> cast(array.as_ref(), <span class="kw-2">&amp;</span>DataType::LargeUtf8)
<a href=#163 id=163 data-nosnippet>163</a> .map_err(|e| DataFusionError::Execution(<span class="macro">format!</span>(<span class="string">"INSERT: {} cast failed: {}"</span>, name, e)))
<a href=#164 id=164 data-nosnippet>164</a>}
<a href=#165 id=165 data-nosnippet>165</a>
<a href=#166 id=166 data-nosnippet>166</a><span class="kw">fn </span>cast_to_int64(array: <span class="kw-2">&amp;</span>ArrayRef, name: <span class="kw-2">&amp;</span>str) -&gt; datafusion_common::Result&lt;ArrayRef&gt; {
<a href=#167 id=167 data-nosnippet>167</a> cast(array.as_ref(), <span class="kw-2">&amp;</span>DataType::Int64)
<a href=#168 id=168 data-nosnippet>168</a> .map_err(|e| DataFusionError::Execution(<span class="macro">format!</span>(<span class="string">"INSERT: {} cast failed: {}"</span>, name, e)))
<a href=#169 id=169 data-nosnippet>169</a>}
<a href=#170 id=170 data-nosnippet>170</a>
<a href=#171 id=171 data-nosnippet>171</a><span class="doccomment">/// Perform the INSERT string operation.
<a href=#172 id=172 data-nosnippet>172</a>/// pos is 1-based. If pos &lt; 1 or pos &gt; len(str) + 1, returns original string.
<a href=#173 id=173 data-nosnippet>173</a></span><span class="kw">fn </span>insert_string(original: <span class="kw-2">&amp;</span>str, pos: i64, replace_len: i64, new_str: <span class="kw-2">&amp;</span>str) -&gt; String {
<a href=#174 id=174 data-nosnippet>174</a> <span class="kw">let </span>char_count = original.chars().count();
<a href=#175 id=175 data-nosnippet>175</a>
<a href=#176 id=176 data-nosnippet>176</a> <span class="comment">// MySQL behavior: if pos &lt; 1 or pos &gt; string length + 1, return original
<a href=#177 id=177 data-nosnippet>177</a> </span><span class="kw">if </span>pos &lt; <span class="number">1 </span>|| pos <span class="kw">as </span>usize &gt; char_count + <span class="number">1 </span>{
<a href=#178 id=178 data-nosnippet>178</a> <span class="kw">return </span>original.to_string();
<a href=#179 id=179 data-nosnippet>179</a> }
<a href=#180 id=180 data-nosnippet>180</a>
<a href=#181 id=181 data-nosnippet>181</a> <span class="kw">let </span>start_idx = (pos - <span class="number">1</span>) <span class="kw">as </span>usize; <span class="comment">// Convert to 0-based
<a href=#182 id=182 data-nosnippet>182</a>
<a href=#183 id=183 data-nosnippet>183</a> // Calculate end index for replacement
<a href=#184 id=184 data-nosnippet>184</a> </span><span class="kw">let </span>replace_len = <span class="kw">if </span>replace_len &lt; <span class="number">0 </span>{
<a href=#185 id=185 data-nosnippet>185</a> <span class="number">0
<a href=#186 id=186 data-nosnippet>186</a> </span>} <span class="kw">else </span>{
<a href=#187 id=187 data-nosnippet>187</a> replace_len <span class="kw">as </span>usize
<a href=#188 id=188 data-nosnippet>188</a> };
<a href=#189 id=189 data-nosnippet>189</a> <span class="kw">let </span>end_idx = (start_idx + replace_len).min(char_count);
<a href=#190 id=190 data-nosnippet>190</a>
<a href=#191 id=191 data-nosnippet>191</a> <span class="kw">let </span>start_byte = char_to_byte_idx(original, start_idx);
<a href=#192 id=192 data-nosnippet>192</a> <span class="kw">let </span>end_byte = char_to_byte_idx(original, end_idx);
<a href=#193 id=193 data-nosnippet>193</a>
<a href=#194 id=194 data-nosnippet>194</a> <span class="kw">let </span><span class="kw-2">mut </span>result = String::with_capacity(original.len() + new_str.len());
<a href=#195 id=195 data-nosnippet>195</a> result.push_str(<span class="kw-2">&amp;</span>original[..start_byte]);
<a href=#196 id=196 data-nosnippet>196</a> result.push_str(new_str);
<a href=#197 id=197 data-nosnippet>197</a> result.push_str(<span class="kw-2">&amp;</span>original[end_byte..]);
<a href=#198 id=198 data-nosnippet>198</a> result
<a href=#199 id=199 data-nosnippet>199</a>}
<a href=#200 id=200 data-nosnippet>200</a>
<a href=#201 id=201 data-nosnippet>201</a><span class="kw">fn </span>char_to_byte_idx(s: <span class="kw-2">&amp;</span>str, char_idx: usize) -&gt; usize {
<a href=#202 id=202 data-nosnippet>202</a> s.char_indices()
<a href=#203 id=203 data-nosnippet>203</a> .nth(char_idx)
<a href=#204 id=204 data-nosnippet>204</a> .map(|(idx, <span class="kw">_</span>)| idx)
<a href=#205 id=205 data-nosnippet>205</a> .unwrap_or(s.len())
<a href=#206 id=206 data-nosnippet>206</a>}
<a href=#207 id=207 data-nosnippet>207</a>
<a href=#208 id=208 data-nosnippet>208</a><span class="attr">#[cfg(test)]
<a href=#209 id=209 data-nosnippet>209</a></span><span class="kw">mod </span>tests {
<a href=#210 id=210 data-nosnippet>210</a> <span class="kw">use </span>std::sync::Arc;
<a href=#211 id=211 data-nosnippet>211</a>
<a href=#212 id=212 data-nosnippet>212</a> <span class="kw">use </span>datafusion_common::arrow::array::{Int64Array, StringArray};
<a href=#213 id=213 data-nosnippet>213</a> <span class="kw">use </span>datafusion_common::arrow::datatypes::Field;
<a href=#214 id=214 data-nosnippet>214</a> <span class="kw">use </span>datafusion_expr::ScalarFunctionArgs;
<a href=#215 id=215 data-nosnippet>215</a>
<a href=#216 id=216 data-nosnippet>216</a> <span class="kw">use super</span>::<span class="kw-2">*</span>;
<a href=#217 id=217 data-nosnippet>217</a>
<a href=#218 id=218 data-nosnippet>218</a> <span class="kw">fn </span>create_args(arrays: Vec&lt;ArrayRef&gt;) -&gt; ScalarFunctionArgs {
<a href=#219 id=219 data-nosnippet>219</a> <span class="kw">let </span>arg_fields: Vec&lt;<span class="kw">_</span>&gt; = arrays
<a href=#220 id=220 data-nosnippet>220</a> .iter()
<a href=#221 id=221 data-nosnippet>221</a> .enumerate()
<a href=#222 id=222 data-nosnippet>222</a> .map(|(i, arr)| {
<a href=#223 id=223 data-nosnippet>223</a> Arc::new(Field::new(
<a href=#224 id=224 data-nosnippet>224</a> <span class="macro">format!</span>(<span class="string">"arg_{}"</span>, i),
<a href=#225 id=225 data-nosnippet>225</a> arr.data_type().clone(),
<a href=#226 id=226 data-nosnippet>226</a> <span class="bool-val">true</span>,
<a href=#227 id=227 data-nosnippet>227</a> ))
<a href=#228 id=228 data-nosnippet>228</a> })
<a href=#229 id=229 data-nosnippet>229</a> .collect();
<a href=#230 id=230 data-nosnippet>230</a>
<a href=#231 id=231 data-nosnippet>231</a> ScalarFunctionArgs {
<a href=#232 id=232 data-nosnippet>232</a> args: arrays.iter().cloned().map(ColumnarValue::Array).collect(),
<a href=#233 id=233 data-nosnippet>233</a> arg_fields,
<a href=#234 id=234 data-nosnippet>234</a> return_field: Arc::new(Field::new(<span class="string">"result"</span>, DataType::LargeUtf8, <span class="bool-val">true</span>)),
<a href=#235 id=235 data-nosnippet>235</a> number_rows: arrays[<span class="number">0</span>].len(),
<a href=#236 id=236 data-nosnippet>236</a> config_options: Arc::new(datafusion_common::config::ConfigOptions::default()),
<a href=#237 id=237 data-nosnippet>237</a> }
<a href=#238 id=238 data-nosnippet>238</a> }
<a href=#239 id=239 data-nosnippet>239</a>
<a href=#240 id=240 data-nosnippet>240</a> <span class="attr">#[test]
<a href=#241 id=241 data-nosnippet>241</a> </span><span class="kw">fn </span>test_insert_basic() {
<a href=#242 id=242 data-nosnippet>242</a> <span class="kw">let </span>function = InsertFunction::default();
<a href=#243 id=243 data-nosnippet>243</a>
<a href=#244 id=244 data-nosnippet>244</a> <span class="comment">// INSERT('Quadratic', 3, 4, 'What') =&gt; 'QuWhattic'
<a href=#245 id=245 data-nosnippet>245</a> </span><span class="kw">let </span>str_arr = Arc::new(StringArray::from(<span class="macro">vec!</span>[<span class="string">"Quadratic"</span>]));
<a href=#246 id=246 data-nosnippet>246</a> <span class="kw">let </span>pos = Arc::new(Int64Array::from(<span class="macro">vec!</span>[<span class="number">3</span>]));
<a href=#247 id=247 data-nosnippet>247</a> <span class="kw">let </span>len = Arc::new(Int64Array::from(<span class="macro">vec!</span>[<span class="number">4</span>]));
<a href=#248 id=248 data-nosnippet>248</a> <span class="kw">let </span>newstr = Arc::new(StringArray::from(<span class="macro">vec!</span>[<span class="string">"What"</span>]));
<a href=#249 id=249 data-nosnippet>249</a>
<a href=#250 id=250 data-nosnippet>250</a> <span class="kw">let </span>args = create_args(<span class="macro">vec!</span>[str_arr, pos, len, newstr]);
<a href=#251 id=251 data-nosnippet>251</a> <span class="kw">let </span>result = function.invoke_with_args(args).unwrap();
<a href=#252 id=252 data-nosnippet>252</a>
<a href=#253 id=253 data-nosnippet>253</a> <span class="kw">if let </span>ColumnarValue::Array(array) = result {
<a href=#254 id=254 data-nosnippet>254</a> <span class="kw">let </span>str_array = array.as_string::&lt;i64&gt;();
<a href=#255 id=255 data-nosnippet>255</a> <span class="macro">assert_eq!</span>(str_array.value(<span class="number">0</span>), <span class="string">"QuWhattic"</span>);
<a href=#256 id=256 data-nosnippet>256</a> } <span class="kw">else </span>{
<a href=#257 id=257 data-nosnippet>257</a> <span class="macro">panic!</span>(<span class="string">"Expected array result"</span>);
<a href=#258 id=258 data-nosnippet>258</a> }
<a href=#259 id=259 data-nosnippet>259</a> }
<a href=#260 id=260 data-nosnippet>260</a>
<a href=#261 id=261 data-nosnippet>261</a> <span class="attr">#[test]
<a href=#262 id=262 data-nosnippet>262</a> </span><span class="kw">fn </span>test_insert_out_of_range_pos() {
<a href=#263 id=263 data-nosnippet>263</a> <span class="kw">let </span>function = InsertFunction::default();
<a href=#264 id=264 data-nosnippet>264</a>
<a href=#265 id=265 data-nosnippet>265</a> <span class="comment">// INSERT('Quadratic', 0, 4, 'What') =&gt; 'Quadratic' (pos &lt; 1)
<a href=#266 id=266 data-nosnippet>266</a> </span><span class="kw">let </span>str_arr = Arc::new(StringArray::from(<span class="macro">vec!</span>[<span class="string">"Quadratic"</span>, <span class="string">"Quadratic"</span>]));
<a href=#267 id=267 data-nosnippet>267</a> <span class="kw">let </span>pos = Arc::new(Int64Array::from(<span class="macro">vec!</span>[<span class="number">0</span>, <span class="number">100</span>]));
<a href=#268 id=268 data-nosnippet>268</a> <span class="kw">let </span>len = Arc::new(Int64Array::from(<span class="macro">vec!</span>[<span class="number">4</span>, <span class="number">4</span>]));
<a href=#269 id=269 data-nosnippet>269</a> <span class="kw">let </span>newstr = Arc::new(StringArray::from(<span class="macro">vec!</span>[<span class="string">"What"</span>, <span class="string">"What"</span>]));
<a href=#270 id=270 data-nosnippet>270</a>
<a href=#271 id=271 data-nosnippet>271</a> <span class="kw">let </span>args = create_args(<span class="macro">vec!</span>[str_arr, pos, len, newstr]);
<a href=#272 id=272 data-nosnippet>272</a> <span class="kw">let </span>result = function.invoke_with_args(args).unwrap();
<a href=#273 id=273 data-nosnippet>273</a>
<a href=#274 id=274 data-nosnippet>274</a> <span class="kw">if let </span>ColumnarValue::Array(array) = result {
<a href=#275 id=275 data-nosnippet>275</a> <span class="kw">let </span>str_array = array.as_string::&lt;i64&gt;();
<a href=#276 id=276 data-nosnippet>276</a> <span class="macro">assert_eq!</span>(str_array.value(<span class="number">0</span>), <span class="string">"Quadratic"</span>); <span class="comment">// pos &lt; 1
<a href=#277 id=277 data-nosnippet>277</a> </span><span class="macro">assert_eq!</span>(str_array.value(<span class="number">1</span>), <span class="string">"Quadratic"</span>); <span class="comment">// pos &gt; length
<a href=#278 id=278 data-nosnippet>278</a> </span>} <span class="kw">else </span>{
<a href=#279 id=279 data-nosnippet>279</a> <span class="macro">panic!</span>(<span class="string">"Expected array result"</span>);
<a href=#280 id=280 data-nosnippet>280</a> }
<a href=#281 id=281 data-nosnippet>281</a> }
<a href=#282 id=282 data-nosnippet>282</a>
<a href=#283 id=283 data-nosnippet>283</a> <span class="attr">#[test]
<a href=#284 id=284 data-nosnippet>284</a> </span><span class="kw">fn </span>test_insert_replace_to_end() {
<a href=#285 id=285 data-nosnippet>285</a> <span class="kw">let </span>function = InsertFunction::default();
<a href=#286 id=286 data-nosnippet>286</a>
<a href=#287 id=287 data-nosnippet>287</a> <span class="comment">// INSERT('Quadratic', 3, 100, 'What') =&gt; 'QuWhat' (len exceeds remaining)
<a href=#288 id=288 data-nosnippet>288</a> </span><span class="kw">let </span>str_arr = Arc::new(StringArray::from(<span class="macro">vec!</span>[<span class="string">"Quadratic"</span>]));
<a href=#289 id=289 data-nosnippet>289</a> <span class="kw">let </span>pos = Arc::new(Int64Array::from(<span class="macro">vec!</span>[<span class="number">3</span>]));
<a href=#290 id=290 data-nosnippet>290</a> <span class="kw">let </span>len = Arc::new(Int64Array::from(<span class="macro">vec!</span>[<span class="number">100</span>]));
<a href=#291 id=291 data-nosnippet>291</a> <span class="kw">let </span>newstr = Arc::new(StringArray::from(<span class="macro">vec!</span>[<span class="string">"What"</span>]));
<a href=#292 id=292 data-nosnippet>292</a>
<a href=#293 id=293 data-nosnippet>293</a> <span class="kw">let </span>args = create_args(<span class="macro">vec!</span>[str_arr, pos, len, newstr]);
<a href=#294 id=294 data-nosnippet>294</a> <span class="kw">let </span>result = function.invoke_with_args(args).unwrap();
<a href=#295 id=295 data-nosnippet>295</a>
<a href=#296 id=296 data-nosnippet>296</a> <span class="kw">if let </span>ColumnarValue::Array(array) = result {
<a href=#297 id=297 data-nosnippet>297</a> <span class="kw">let </span>str_array = array.as_string::&lt;i64&gt;();
<a href=#298 id=298 data-nosnippet>298</a> <span class="macro">assert_eq!</span>(str_array.value(<span class="number">0</span>), <span class="string">"QuWhat"</span>);
<a href=#299 id=299 data-nosnippet>299</a> } <span class="kw">else </span>{
<a href=#300 id=300 data-nosnippet>300</a> <span class="macro">panic!</span>(<span class="string">"Expected array result"</span>);
<a href=#301 id=301 data-nosnippet>301</a> }
<a href=#302 id=302 data-nosnippet>302</a> }
<a href=#303 id=303 data-nosnippet>303</a>
<a href=#304 id=304 data-nosnippet>304</a> <span class="attr">#[test]
<a href=#305 id=305 data-nosnippet>305</a> </span><span class="kw">fn </span>test_insert_unicode() {
<a href=#306 id=306 data-nosnippet>306</a> <span class="kw">let </span>function = InsertFunction::default();
<a href=#307 id=307 data-nosnippet>307</a>
<a href=#308 id=308 data-nosnippet>308</a> <span class="comment">// INSERT('hello世界', 6, 1, 'の') =&gt; 'helloの界'
<a href=#309 id=309 data-nosnippet>309</a> </span><span class="kw">let </span>str_arr = Arc::new(StringArray::from(<span class="macro">vec!</span>[<span class="string">"hello世界"</span>]));
<a href=#310 id=310 data-nosnippet>310</a> <span class="kw">let </span>pos = Arc::new(Int64Array::from(<span class="macro">vec!</span>[<span class="number">6</span>]));
<a href=#311 id=311 data-nosnippet>311</a> <span class="kw">let </span>len = Arc::new(Int64Array::from(<span class="macro">vec!</span>[<span class="number">1</span>]));
<a href=#312 id=312 data-nosnippet>312</a> <span class="kw">let </span>newstr = Arc::new(StringArray::from(<span class="macro">vec!</span>[<span class="string">"の"</span>]));
<a href=#313 id=313 data-nosnippet>313</a>
<a href=#314 id=314 data-nosnippet>314</a> <span class="kw">let </span>args = create_args(<span class="macro">vec!</span>[str_arr, pos, len, newstr]);
<a href=#315 id=315 data-nosnippet>315</a> <span class="kw">let </span>result = function.invoke_with_args(args).unwrap();
<a href=#316 id=316 data-nosnippet>316</a>
<a href=#317 id=317 data-nosnippet>317</a> <span class="kw">if let </span>ColumnarValue::Array(array) = result {
<a href=#318 id=318 data-nosnippet>318</a> <span class="kw">let </span>str_array = array.as_string::&lt;i64&gt;();
<a href=#319 id=319 data-nosnippet>319</a> <span class="macro">assert_eq!</span>(str_array.value(<span class="number">0</span>), <span class="string">"helloの界"</span>);
<a href=#320 id=320 data-nosnippet>320</a> } <span class="kw">else </span>{
<a href=#321 id=321 data-nosnippet>321</a> <span class="macro">panic!</span>(<span class="string">"Expected array result"</span>);
<a href=#322 id=322 data-nosnippet>322</a> }
<a href=#323 id=323 data-nosnippet>323</a> }
<a href=#324 id=324 data-nosnippet>324</a>
<a href=#325 id=325 data-nosnippet>325</a> <span class="attr">#[test]
<a href=#326 id=326 data-nosnippet>326</a> </span><span class="kw">fn </span>test_insert_with_nulls() {
<a href=#327 id=327 data-nosnippet>327</a> <span class="kw">let </span>function = InsertFunction::default();
<a href=#328 id=328 data-nosnippet>328</a>
<a href=#329 id=329 data-nosnippet>329</a> <span class="kw">let </span>str_arr = Arc::new(StringArray::from(<span class="macro">vec!</span>[<span class="prelude-val">Some</span>(<span class="string">"hello"</span>), <span class="prelude-val">None</span>]));
<a href=#330 id=330 data-nosnippet>330</a> <span class="kw">let </span>pos = Arc::new(Int64Array::from(<span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">1</span>]));
<a href=#331 id=331 data-nosnippet>331</a> <span class="kw">let </span>len = Arc::new(Int64Array::from(<span class="macro">vec!</span>[<span class="number">1</span>, <span class="number">1</span>]));
<a href=#332 id=332 data-nosnippet>332</a> <span class="kw">let </span>newstr = Arc::new(StringArray::from(<span class="macro">vec!</span>[<span class="string">"X"</span>, <span class="string">"X"</span>]));
<a href=#333 id=333 data-nosnippet>333</a>
<a href=#334 id=334 data-nosnippet>334</a> <span class="kw">let </span>args = create_args(<span class="macro">vec!</span>[str_arr, pos, len, newstr]);
<a href=#335 id=335 data-nosnippet>335</a> <span class="kw">let </span>result = function.invoke_with_args(args).unwrap();
<a href=#336 id=336 data-nosnippet>336</a>
<a href=#337 id=337 data-nosnippet>337</a> <span class="kw">if let </span>ColumnarValue::Array(array) = result {
<a href=#338 id=338 data-nosnippet>338</a> <span class="kw">let </span>str_array = array.as_string::&lt;i64&gt;();
<a href=#339 id=339 data-nosnippet>339</a> <span class="macro">assert_eq!</span>(str_array.value(<span class="number">0</span>), <span class="string">"Xello"</span>);
<a href=#340 id=340 data-nosnippet>340</a> <span class="macro">assert!</span>(str_array.is_null(<span class="number">1</span>));
<a href=#341 id=341 data-nosnippet>341</a> } <span class="kw">else </span>{
<a href=#342 id=342 data-nosnippet>342</a> <span class="macro">panic!</span>(<span class="string">"Expected array result"</span>);
<a href=#343 id=343 data-nosnippet>343</a> }
<a href=#344 id=344 data-nosnippet>344</a> }
<a href=#345 id=345 data-nosnippet>345</a>}</code></pre></div></section></main></body></html>
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