{"id":8434,"date":"2024-03-14T08:07:19","date_gmt":"2024-03-14T08:07:19","guid":{"rendered":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-in-mybatis-to-check-if-a-list-is-not-empty\/"},"modified":"2025-08-03T04:51:20","modified_gmt":"2025-08-03T04:51:20","slug":"what-is-the-method-in-mybatis-to-check-if-a-list-is-not-empty","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/blog\/what-is-the-method-in-mybatis-to-check-if-a-list-is-not-empty\/","title":{"rendered":"Check Non-Empty List in MyBatis"},"content":{"rendered":"<p>In MyBatis, you can determine if a List is not empty using dynamic SQL. Here is a simple example:<\/p>\n<pre class=\"post-pre\"><code><span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">select<\/span> <span class=\"hljs-attr\">id<\/span>=<span class=\"hljs-string\">\"selectByList\"<\/span> <span class=\"hljs-attr\">parameterType<\/span>=<span class=\"hljs-string\">\"java.util.List\"<\/span> <span class=\"hljs-attr\">resultType<\/span>=<span class=\"hljs-string\">\"YourResultType\"<\/span>&gt;<\/span>\r\n    SELECT * FROM your_table\r\n    WHERE id IN\r\n    <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">foreach<\/span> <span class=\"hljs-attr\">collection<\/span>=<span class=\"hljs-string\">\"list\"<\/span> <span class=\"hljs-attr\">item<\/span>=<span class=\"hljs-string\">\"item\"<\/span> <span class=\"hljs-attr\">open<\/span>=<span class=\"hljs-string\">\"(\"<\/span> <span class=\"hljs-attr\">close<\/span>=<span class=\"hljs-string\">\")\"<\/span> <span class=\"hljs-attr\">separator<\/span>=<span class=\"hljs-string\">\",\"<\/span>&gt;<\/span>\r\n        #{item}\r\n    <span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">foreach<\/span>&gt;<\/span>\r\n<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">select<\/span>&gt;<\/span>\r\n<\/code><\/pre>\n<p>In this example, we are utilizing the foreach tag to iterate through the incoming List. If the List is not empty, a query operation will be executed. If the List is empty, no operation will be performed. This way, we achieve the functionality of checking if the List is not empty.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In MyBatis, you can determine if a List is not empty using dynamic SQL. Here is a simple example: &lt;select id=&#8221;selectByList&#8221; parameterType=&#8221;java.util.List&#8221; resultType=&#8221;YourResultType&#8221;&gt; SELECT * FROM your_table WHERE id IN &lt;foreach collection=&#8221;list&#8221; item=&#8221;item&#8221; open=&#8221;(&#8221; close=&#8221;)&#8221; separator=&#8221;,&#8221;&gt; #{item} &lt;\/foreach&gt; &lt;\/select&gt; In this example, we are utilizing the foreach tag to iterate through the incoming List. If [&hellip;]<\/p>\n","protected":false},"author":11,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_import_markdown_pro_load_document_selector":0,"_import_markdown_pro_submit_text_textarea":"","footnotes":""},"categories":[1],"tags":[1467,1466,2688,11358,1459],"class_list":["post-8434","post","type-post","status-publish","format-standard","hentry","category-uncategorized","tag-dynamic-sql","tag-foreach-tag","tag-java-persistence","tag-list-handling","tag-mybatis"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Check Non-Empty List in MyBatis - Blog - Silicon Cloud<\/title>\n<meta name=\"description\" content=\"Learn how to verify non-empty lists in MyBatis using dynamic SQL foreach tag. Handle list conditions safely.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/blog\/what-is-the-method-in-mybatis-to-check-if-a-list-is-not-empty\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Check Non-Empty List in MyBatis\" \/>\n<meta property=\"og:description\" content=\"Learn how to verify non-empty lists in MyBatis using dynamic SQL foreach tag. 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