{"id":66491,"date":"2024-10-14T18:00:18","date_gmt":"2024-10-14T10:00:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/66491\/"},"modified":"2024-10-14T18:00:19","modified_gmt":"2024-10-14T10:00:19","slug":"mysql-%e9%8c%af%e8%aa%a4%e8%99%9f%ef%bc%9a3022%ef%bc%9b%e7%ac%a6%e8%99%9f%ef%bc%9aer_warn_open_temp_tables_must_be_zero%ef%bc%9bsqlstate%ef%bc%9ahy000-%e5%a0%b1%e9%8c%af-%e6%95%85%e9%9a%9c%e4%bf%ae","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/66491\/","title":{"rendered":"MySQL \u932f\u8aa4\u865f\uff1a3022\uff1b\u7b26\u865f\uff1aER_WARN_OPEN_TEMP_TABLES_MUST_BE_ZERO\uff1bSQLSTATE\uff1aHY000 \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406"},"content":{"rendered":"<h1 id=\"mysql-%e9%8c%af%e8%aa%a4%e8%99%9f%ef%bc%9a3022%ef%bc%9b%e7%ac%a6%e8%99%9f%ef%bc%9aer_warn_open_temp_tables_must_be_zero%ef%bc%9bsqlstate%ef%bc%9ahy000-%e5%a0%b1%e9%8c%af-%e6%95%85%e9%9a%9c%e4%bf%ae-FNJBEfyqTF\">MySQL \u932f\u8aa4\u865f\uff1a3022\uff1b\u7b26\u865f\uff1aER_WARN_OPEN_TEMP_TABLES_MUST_BE_ZERO\uff1bSQLSTATE\uff1aHY000 \u5831\u932f \u6545\u969c\u4fee\u5fa9 \u9060\u7a0b\u8655\u7406<\/h1>\n<p>\u5728\u4f7f\u7528 MySQL \u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u548c\u7cfb\u7d71\u7ba1\u7406\u54e1\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\uff0c\u5176\u4e2d\u4e4b\u4e00\u4fbf\u662f\u932f\u8aa4\u865f 3022\uff0c\u7b26\u865f\u70ba ER_WARN_OPEN_TEMP_TABLES_MUST_BE_ZERO\uff0cSQLSTATE \u70ba HY000\u3002\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8207\u81e8\u6642\u8868\u7684\u4f7f\u7528\u6709\u95dc\uff0c\u7279\u5225\u662f\u5728\u57f7\u884c\u67d0\u4e9b\u67e5\u8a62\u6642\uff0cMySQL \u6703\u8981\u6c42\u6240\u6709\u7684\u81e8\u6642\u8868\u5728\u67e5\u8a62\u7d50\u675f\u6642\u5fc5\u9808\u88ab\u95dc\u9589\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u539f\u56e0\u53ca\u5176\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n<h2 id=\"%e9%8c%af%e8%aa%a4%e5%8e%9f%e5%9b%a0%e5%88%86%e6%9e%90-FNJBEfyqTF\">\u932f\u8aa4\u539f\u56e0\u5206\u6790<\/h2>\n<p>\u7576 MySQL \u5728\u57f7\u884c\u67e5\u8a62\u6642\uff0c\u82e5\u767c\u73fe\u6709\u958b\u653e\u7684\u81e8\u6642\u8868\uff0c\u4fbf\u6703\u89f8\u767c\u932f\u8aa4 3022\u3002\u9019\u901a\u5e38\u767c\u751f\u5728\u4ee5\u4e0b\u60c5\u6cc1\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u4e86\u4e0d\u7576\u7684 JOIN \u64cd\u4f5c\uff0c\u5c0e\u81f4 MySQL \u9700\u8981\u5275\u5efa\u81e8\u6642\u8868\u4f86\u5b58\u5132\u4e2d\u9593\u7d50\u679c\u3002<\/li>\n<li>\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528\u4e86 GROUP BY \u6216 ORDER BY\uff0c\u4e26\u4e14\u672a\u80fd\u6b63\u78ba\u8655\u7406\u81e8\u6642\u8868\u3002<\/li>\n<li>\u5728\u5b58\u5132\u904e\u7a0b\u6216\u89f8\u767c\u5668\u4e2d\uff0c\u672a\u80fd\u59a5\u5584\u7ba1\u7406\u81e8\u6642\u8868\u7684\u751f\u547d\u9031\u671f\u3002<\/li>\n<\/ul>\n<p>\u9019\u4e9b\u60c5\u6cc1\u90fd\u53ef\u80fd\u5c0e\u81f4 MySQL \u5728\u67e5\u8a62\u7d50\u675f\u6642\u4ecd\u7136\u6709\u958b\u653e\u7684\u81e8\u6642\u8868\uff0c\u5f9e\u800c\u5f15\u767c\u932f\u8aa4 3022\u3002<\/p>\n<h2 id=\"%e6%95%85%e9%9a%9c%e4%bf%ae%e5%be%a9%e6%ad%a5%e9%a9%9f-FNJBEfyqTF\">\u6545\u969c\u4fee\u5fa9\u6b65\u9a5f<\/h2>\n<p>\u8981\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9a5f\u9032\u884c\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e6%9f%a5%e8%a9%a2%e8%aa%9e%e5%8f%a5-FNJBEfyqTF\">1. \u6aa2\u67e5\u67e5\u8a62\u8a9e\u53e5<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u5c0e\u81f4\u932f\u8aa4\u7684 SQL \u67e5\u8a62\u8a9e\u53e5\u3002\u78ba\u4fdd\u5728\u4f7f\u7528 JOIN\u3001GROUP BY \u6216 ORDER BY \u6642\uff0c\u6240\u6709\u7684\u81e8\u6642\u8868\u90fd\u80fd\u5920\u6b63\u78ba\u95dc\u9589\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT a.*, b.*\nFROM table_a a\nJOIN table_b b ON a.id = b.a_id\nGROUP BY a.id;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c\u78ba\u4fdd GROUP BY \u7684\u5b57\u6bb5\u80fd\u5920\u6b63\u78ba\u5730\u95dc\u9589\u81e8\u6642\u8868\u3002<\/p>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8-explain-%e8%aa%9e%e5%8f%a5-FNJBEfyqTF\">2. \u4f7f\u7528 EXPLAIN \u8a9e\u53e5<\/h3>\n<p>\u4f7f\u7528 EXPLAIN \u8a9e\u53e5\u4f86\u5206\u6790\u67e5\u8a62\u7684\u57f7\u884c\u8a08\u5283\uff0c\u9019\u6a23\u53ef\u4ee5\u5e6b\u52a9\u4f60\u4e86\u89e3 MySQL \u662f\u5982\u4f55\u8655\u7406\u67e5\u8a62\u7684\uff0c\u4e26\u627e\u51fa\u53ef\u80fd\u5c0e\u81f4\u81e8\u6642\u8868\u958b\u653e\u7684\u539f\u56e0\uff1a<\/p>\n<pre><code>EXPLAIN SELECT a.*, b.*\nFROM table_a a\nJOIN table_b b ON a.id = b.a_id\nGROUP BY a.id;<\/code><\/pre>\n<h3 id=\"3-%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2-FNJBEfyqTF\">3. \u512a\u5316\u67e5\u8a62<\/h3>\n<p>\u6839\u64da EXPLAIN \u7684\u7d50\u679c\uff0c\u5c0d\u67e5\u8a62\u9032\u884c\u512a\u5316\u3002\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u7d22\u5f15\u4f86\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u6e1b\u5c11\u81e8\u6642\u8868\u7684\u4f7f\u7528\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>CREATE INDEX idx_a_id ON table_a(id);\nCREATE INDEX idx_b_a_id ON table_b(a_id);<\/code><\/pre>\n<h3 id=\"4-%e6%aa%a2%e6%9f%a5%e5%ad%98%e5%84%b2%e9%81%8e%e7%a8%8b%e5%92%8c%e8%a7%b8%e7%99%bc%e5%99%a8-FNJBEfyqTF\">4. \u6aa2\u67e5\u5b58\u5132\u904e\u7a0b\u548c\u89f8\u767c\u5668<\/h3>\n<p>\u5982\u679c\u932f\u8aa4\u767c\u751f\u5728\u5b58\u5132\u904e\u7a0b\u6216\u89f8\u767c\u5668\u4e2d\uff0c\u8acb\u6aa2\u67e5\u9019\u4e9b\u4ee3\u78bc\u6bb5\uff0c\u78ba\u4fdd\u6240\u6709\u7684\u81e8\u6642\u8868\u90fd\u80fd\u5728\u4f7f\u7528\u5f8c\u6b63\u78ba\u95dc\u9589\u3002\u53ef\u4ee5\u4f7f\u7528 DROP TEMPORARY TABLE \u8a9e\u53e5\u4f86\u624b\u52d5\u95dc\u9589\u81e8\u6642\u8868\u3002<\/p>\n<h2 id=\"%e9%81%a0%e7%a8%8b%e8%99%95%e7%90%86%e5%bb%ba%e8%ad%b0-FNJBEfyqTF\">\u9060\u7a0b\u8655\u7406\u5efa\u8b70<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u9060\u7a0b\u8655\u7406 MySQL \u6578\u64da\u5eab\u7684\u554f\u984c\u3002\u9019\u6642\uff0c\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u4ee5\u4e0b\u5de5\u5177\u548c\u65b9\u6cd5\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528 SSH \u9023\u63a5\u5230\u4f3a\u670d\u5668\uff0c\u4e26\u4f7f\u7528 MySQL \u5ba2\u6236\u7aef\u9032\u884c\u67e5\u8a62\u548c\u6545\u969c\u6392\u9664\u3002<\/li>\n<li>\u5229\u7528\u9060\u7a0b\u7ba1\u7406\u5de5\u5177\uff0c\u5982 phpMyAdmin \u6216 MySQL Workbench\uff0c\u4f86\u6aa2\u67e5\u548c\u512a\u5316\u6578\u64da\u5eab\u3002<\/li>\n<li>\u5b9a\u671f\u5099\u4efd\u6578\u64da\u5eab\uff0c\u4ee5\u9632\u6b62\u6578\u64da\u4e1f\u5931\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-FNJBEfyqTF\">\u7e3d\u7d50<\/h2>\n<p>MySQL \u932f\u8aa4\u865f 3022 \u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u901a\u5e38\u8207\u81e8\u6642\u8868\u7684\u7ba1\u7406\u6709\u95dc\u3002\u901a\u904e\u6aa2\u67e5\u67e5\u8a62\u8a9e\u53e5\u3001\u4f7f\u7528 EXPLAIN \u8a9e\u53e5\u9032\u884c\u5206\u6790\u3001\u512a\u5316\u67e5\u8a62\u4ee5\u53ca\u6aa2\u67e5\u5b58\u5132\u904e\u7a0b\u548c\u89f8\u767c\u5668\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u9019\u500b\u554f\u984c\u3002\u6b64\u5916\uff0c\u9060\u7a0b\u8655\u7406\u5de5\u5177\u4e5f\u80fd\u5e6b\u52a9\u7ba1\u7406\u54e1\u66f4\u65b9\u4fbf\u5730\u9032\u884c\u6545\u969c\u6392\u9664\u3002\u82e5\u60a8\u9700\u8981\u7a69\u5b9a\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u670d\u52d9\u4f86\u904b\u884c\u60a8\u7684 MySQL \u6578\u64da\u5eab\uff0c\u8acb\u8003\u616e\u6211\u5011\u7684\u89e3\u6c7a\u65b9\u6848\uff0c\u4ee5\u78ba\u4fdd\u60a8\u7684\u696d\u52d9\u904b\u884c\u9806\u5229\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u89e3\u6c7a MySQL \u932f\u8aa4\u865f 3022 \u7684\u65b9\u6cd5\uff0c\u7b26\u865f ER_WARN_OPEN_TEMP_TABLES_MUST_BE_ZERO\uff0cSQLSTATE HY000\uff0c\u63d0\u4f9b\u6545\u969c\u4fee\u5fa9\u8207\u9060\u7a0b\u8655\u7406\u6307\u5c0e\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-66491","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66491","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=66491"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66491\/revisions"}],"predecessor-version":[{"id":66492,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66491\/revisions\/66492"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=66491"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=66491"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=66491"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}