{"id":830,"date":"2020-08-06T15:31:29","date_gmt":"2020-08-06T07:31:29","guid":{"rendered":"http:\/\/www.gbase8.cn\/?p=830"},"modified":"2021-01-13T10:22:50","modified_gmt":"2021-01-13T02:22:50","slug":"gbase8a-%e6%95%b0%e6%8d%ae%e5%ba%93%e5%90%84%e7%b1%bb%e6%95%b0%e6%8d%ae%e7%b1%bb%e5%9e%8b%e6%94%af%e6%8c%81%e7%9a%84%e6%9c%80%e9%95%bf%e5%ad%97%e6%ae%b5","status":"publish","type":"post","link":"https:\/\/www.gbase8.cn\/en\/830","title":{"rendered":"\u5357\u5927\u901a\u7528gbase8a \u6570\u636e\u5e93\u5404\u7c7b\u6570\u636e\u7c7b\u578b\u652f\u6301\u7684\u6700\u957f\u5b57\u6bb5"},"content":{"rendered":"<p>GBase 8a\u6570\u636e\u5e93\u96c6\u7fa4\uff0c\u5bf9\u5404\u79cd\u652f\u6301\u7684\u6570\u636e\u7c7b\u578b\u90fd\u505a\u4e86\u957f\u5ea6\u9650\u5236\uff0c\u6bd4\u5982varchar\u6700\u9ad810922\u5b57\u7b26\uff0cdecimal\u6700\u9ad865,30\u7b49\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-6a2b1458d71f3\" 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-6a2b1458d71f3\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.gbase8.cn\/en\/830\/#varchar\" >varchar<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.gbase8.cn\/en\/830\/#decimal\" >decimal<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.gbase8.cn\/en\/830\/#LONGBLOB%E3%80%81LONGTEXT\" >LONGBLOB\u3001LONGTEXT<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.gbase8.cn\/en\/830\/#%E6%B5%8B%E8%AF%95%E6%A0%B7%E4%BE%8B\" >\u6d4b\u8bd5\u6837\u4f8b<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.gbase8.cn\/en\/830\/#%E8%AF%A6%E7%BB%86%E7%9A%84%E6%95%B0%E6%8D%AE%E5%BA%93%E7%9A%84%E6%8C%87%E6%A0%87%EF%BC%8C%E8%AF%B7%E5%8F%82%E8%80%83\" >\u8be6\u7ec6\u7684\u6570\u636e\u5e93\u7684\u6307\u6807\uff0c\u8bf7\u53c2\u8003<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"varchar\"><\/span>varchar <span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>UTF8\u5b57\u7b26\u96c6\uff0c\u6700\u957f10922\u5b57\u7b26<br>UTF8MB4\u5b57\u7b26\u96c6\uff0c\u6700\u957f8191\u5b57\u7b26<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"decimal\"><\/span>decimal<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6700\u5927\u957f\u5ea6 65<br>\u6700\u5927\u7cbe\u5ea6 30<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"LONGBLOB%E3%80%81LONGTEXT\"><\/span>LONGBLOB\u3001LONGTEXT<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>\u6700\u5927\u957f\u5ea664M<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E6%B5%8B%E8%AF%95%E6%A0%B7%E4%BE%8B\"><\/span>\u6d4b\u8bd5\u6837\u4f8b<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<pre class=\"wp-block-code\"><code>gbase&gt; create table t_varchar(c1 varchar(10922),d1 decimal(100,100))charset='utf8';\nERROR 1425 (42000): Too big scale 100 specified for column 'd1'. Maximum is 30.\ngbase&gt; create table t_varchar(c1 varchar(10922),d1 decimal(100,30))charset='utf8';\nERROR 1426 (42000): Too big precision 100 specified for column 'd1'. Maximum is 65.\ngbase&gt; create table t_varchar(c1 varchar(10923),d1 decimal(65,30))charset='utf8';\nERROR 1702 (HY000): gcluster table error: Column length too big for column 'c1' (max = 10922); use BLOB or TEXT instead.\ngbase&gt; create table t_varchar(c1 varchar(10922),d1 decimal(65,30))charset='utf8';\nQuery OK, 0 rows affected (Elapsed: 00:00:00.12)\n\ngbase&gt; create table t_varchar2(c1 varchar(10922),d1 decimal(65,30))charset='utf8mb4';\nERROR 1702 (HY000): gcluster table error: Column length too big for column 'c1' (max = 8191); use BLOB or TEXT instead.\ngbase&gt;\ngbase&gt; create table t_varchar2(c1 varchar(8191),d1 decimal(65,30))charset='utf8mb4';\nQuery OK, 0 rows affected (Elapsed: 00:00:00.08)\n\ngbase&gt;\n\n<\/code><\/pre>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"%E8%AF%A6%E7%BB%86%E7%9A%84%E6%95%B0%E6%8D%AE%E5%BA%93%E7%9A%84%E6%8C%87%E6%A0%87%EF%BC%8C%E8%AF%B7%E5%8F%82%E8%80%83\"><\/span>\u8be6\u7ec6\u7684\u6570\u636e\u5e93\u7684\u6307\u6807\uff0c\u8bf7\u53c2\u8003<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p><a href=\"http:\/\/www.gbase8.cn\/en\/?p=803\">GBase 8a\u6570\u636e\u5e93\u96c6\u7fa4\u57fa\u672c\u6280\u672f\u6307\u6807<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u5357\u5927\u901a\u7528GBase 8a\u6570\u636e\u5e93\u96c6\u7fa4\uff0c\u5bf9\u5404\u79cd\u652f\u6301\u7684\u6570\u636e\u7c7b\u578b\u90fd\u505a\u4e86\u957f\u5ea6\u9650\u5236\uff0c\u6bd4\u5982varchar\u6700\u9ad810922\u5b57\u7b26\uff0cdecimal\u6700\u9ad865,30\u7b49\u3002<\/p>","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[4],"tags":[],"class_list":["post-830","post","type-post","status-publish","format-standard","hentry","category-gbase8a"],"_links":{"self":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/830","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=830"}],"version-history":[{"count":4,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/830\/revisions"}],"predecessor-version":[{"id":3452,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/posts\/830\/revisions\/3452"}],"wp:attachment":[{"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/media?parent=830"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/categories?post=830"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.gbase8.cn\/en\/wp-json\/wp\/v2\/tags?post=830"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}