{"id":1249,"date":"2020-09-13T18:00:54","date_gmt":"2020-09-13T10:00:54","guid":{"rendered":"http:\/\/www.gbase8.cn\/?p=1249"},"modified":"2020-09-18T10:55:43","modified_gmt":"2020-09-18T02:55:43","slug":"gbase-8a%e5%8a%a8%e6%80%81%e6%b8%b8%e6%a0%87%e6%a0%b7%e4%be%8b","status":"publish","type":"post","link":"https:\/\/www.gbase8.cn\/en\/1249","title":{"rendered":"\u5357\u5927\u901a\u7528GBase 8a\u52a8\u6001\u6e38\u6807\u6837\u4f8b"},"content":{"rendered":"<p>GBase 8a\u6570\u636e\u5e93\u96c6\u7fa4\u652f\u6301\u52a8\u6001\u6e38\u6807 REF CURSOR\uff0c\u5176\u5177\u4f53\u7684SQL\u5728open\u662f\u6307\u5b9a\u3002\u5982\u679cSQL\u4e5f\u662f\u62fc\u63a5\u7684\uff0c\u53ef\u4ee5\u5148\u590d\u5236\u5230\u4e00\u4e2a\u53d8\u91cf\uff0c\u6bd4\u5982@sql,\u7136\u540eopen cur for @sql\u3002<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Directory Navigation<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a2b162b1575a\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a2b162b1575a\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.gbase8.cn\/en\/1249\/#%E6%A0%B7%E4%BE%8B\" >\u6837\u4f8b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.gbase8.cn\/en\/1249\/#%E6%89%A7%E8%A1%8C%E7%BB%93%E6%9E%9C\" >\u6267\u884c\u7ed3\u679c<\/a><\/li><\/ul><\/nav><\/div>\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%A0%B7%E4%BE%8B\"><\/span>\u6837\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>drop procedure if exists p_cursor;\ndelimiter \/\/\n\nCREATE PROCEDURE p_cursor()\nBEGIN\n declare tmp int;\n DECLARE DONE INT DEFAULT(0);\n DECLARE cur REF CURSOR;\n DECLARE CONTINUE HANDLER FOR SQLSTATE '02000' SET done = 1;\n OPEN cur FOR SELECT DISTINCT id FROM t1 LIMIT 6;\n REPEAT\n FETCH cur INTO tmp;\n   IF NOT done THEN\n     SELECT tmp; -- \u8c03\u8bd5\u65f6\uff0c\u8fd9\u4e2a\u5199\u8fd9\u91cc\uff0c\u786e\u8ba4\u5faa\u73af\u5199\u6cd5\u6ca1\u6709\u9519\u8bef\u3002\n   END IF;\n UNTIL DONE END REPEAT;\n CLOSE cur;\nEND \/\/ \ndelimiter ;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%89%A7%E8%A1%8C%E7%BB%93%E6%9E%9C\"><\/span>\u6267\u884c\u7ed3\u679c<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code>\ngbase> select distinct id from t1 limit 6;\n+------+\n| id   |\n+------+\n|    1 |\n|    2 |\n|    3 |\n|    4 |\n+------+\n4 rows in set (Elapsed: 00:00:00.11)\n\ngbase> call p_cursor();\n+------+\n| tmp  |\n+------+\n|    1 |\n+------+\n1 row in set (Elapsed: 00:00:00.07)\n\n+------+\n| tmp  |\n+------+\n|    2 |\n+------+\n1 row in set (Elapsed: 00:00:00.07)\n\n+------+\n| tmp  |\n+------+\n|    3 |\n+------+\n1 row in set (Elapsed: 00:00:00.07)\n\n+------+\n| tmp  |\n+------+\n|    4 |\n+------+\n1 row in set (Elapsed: 00:00:00.08)\n\nQuery OK, 0 rows affected (Elapsed: 00:00:00.08)\n\n<\/code><\/pre>\n\n\n\n<p><\/p>","protected":false},"excerpt":{"rendered":"<p>\u5357\u5927\u901a\u7528GBase 8a\u6570\u636e\u5e93\u96c6\u7fa4\u652f\u6301\u52a8\u6001\u6e38\u6807 REF CURSOR\uff0c\u5176\u5177\u4f53\u7684SQL\u5728open\u662f\u6307\u5b9a\u3002\u5982\u679cSQL\u4e5f\u662f\u62fc\u63a5\u7684\uff0c\u53ef\u4ee5\u5148\u590d\u5236\u5230\u4e00\u4e2a\u53d8\u91cf\uff0c\u6bd4\u5982@sql,\u7136\u540eopen cur for @sql\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3],"tags":[],"class_list":["post-1249","post","type-post","status-publish","format-standard","hentry","category-gbase8a"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/1249","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/comments?post=1249"}],"version-history":[{"count":3,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/1249\/revisions"}],"predecessor-version":[{"id":1489,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/1249\/revisions\/1489"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=1249"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=1249"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=1249"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}