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用户在 PostgreSQL 中需要根据一个字符串数组对文本列进行不区分大小写的匹配，但现有 SQL 语法（如 ANY）通常用于数组列而非字符串匹配。用户尝试避免逐项查询后去重，因为那样会导致多次数据库往返和重复数据处理，增加开发复杂度和执行时间。用户自己找到的解决方案（string_to_array 结合 && 操作符）虽然可行，但需要手动转换类型，且可能对性能有影响，说明缺乏简洁、高效的原生语法支持。这导致开发者在实现类似“关键词过滤”或“标签匹配”功能时，需要编写额外代码或依赖变通方案，增加了维护成本和出错风险。
I would like to execute a case insensitive match on a column looking for any match for a given array of strings. Example: If a row contained values id, comment 1, 'This is my comment' And I was trying to match any term in the array ('statement','term','comment') I would love a query something like this SELECT * FROM table_name WHERE ( string_to_array(comment, ' ') ANY ('{term}') ); Now I understand the ANY function is meant to be applied to array columns but this is effectively what I would like to achieve. What I am trying to avoid is having to iterate through all of the terms and execute an individual query for each and then have to remove duplicates etc etc. EDIT: So I was able to find a solution which seems to work. Although I would still love more feedback to determine if this is a reasonable approach. SELECT * FROM table_name WHERE string_to_array(LOWER(column_name), ' ')::varchar[] && '{term1,term2,term3}'::varchar[];
Here are the two ways to achieve this: Use ANY & ARRAY of terms SELECT * FROM (SELECT 1 id , 'This is my comment' comment1 UNION SELECT 2, 'Another statement') data WHERE comment1 ~~ ANY(ARRAY['%comment%', '%statement%']) SIMILAR TO SELECT * FROM (SELECT 1 id , 'This is my comment' comment1 UNION SELECT 2, 'Another statement') data WHERE comment1 SIMILAR TO '%(comment|statement)%'
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"body": "<p>I would like to execute a case insensitive match on a column looking for any match for a given array of strings.</p>\n<p>Example:</p>\n<p>If a row contained values</p>\n<pre class=\"lang-none prettyprint-override\"><code>id, comment\n1, 'This is my comment'\n</code></pre>\n<p>And I was trying to match any term in the array <code>('statement','term','comment')</code></p>\n<p>I would love a query something like this</p>\n<pre><code>SELECT * \nFROM table_name \nWHERE ( string_to_array(comment, ' ') ANY ('{term}') );\n</code></pre>\n<p>Now I understand the ANY function is meant to be applied to array columns but this is effectively what I would like to achieve.</p>\n<p>What I am trying to avoid is having to iterate through all of the terms and execute an individual query for each and then have to remove duplicates etc etc.</p>\n<p>EDIT:</p>\n<p>So I was able to find a solution which seems to work. Although I would still love more feedback to determine if this is a reasonable approach.</p>\n<pre><code>SELECT * FROM table_name WHERE string_to_array(LOWER(column_name), ' ')::varchar[] && '{term1,term2,term3}'::varchar[];\n</code></pre>\n",
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