{"id":1012,"date":"2017-10-28T17:03:43","date_gmt":"2017-10-28T09:03:43","guid":{"rendered":"http:\/\/www.5x44.cn\/?p=1012"},"modified":"2017-10-28T17:03:43","modified_gmt":"2017-10-28T09:03:43","slug":"mysql5-7-%e6%9c%ac%e5%9c%b0%e5%8f%98%e9%87%8f%e5%8c%ba%e5%9f%9f%e5%92%8c%e8%a7%a3%e5%86%b3%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.5x44.cn\/?p=1012","title":{"rendered":"MySql5.7 \u672c\u5730\u53d8\u91cf\u533a\u57df\u548c\u89e3\u51b3\u65b9\u6cd5"},"content":{"rendered":"

\u672c\u5730\u53d8\u91cf\u7684\u533a\u57df\u662f\u5176\u6240\u5b9a\u4e49\u7684BEGIN … END\u5757\u4e2d\u3002\u672c\u5730\u53d8\u91cf\u53ef\u4ee5\u5728\u5176\u5d4c\u5957\u7684\u5185\u5c42\u88ab\u7d22\u5f15\u5230\uff0c\u9664\u975e\u5185\u5c42\u4e5f\u5b9a\u4e49\u4e86\u540c\u540d\u7684\u53d8\u91cf\u3002<\/p>\n

\u56e0\u4e3a\u672c\u5730\u53d8\u91cf\u4ec5\u5728\u5b58\u50a8\u7684\u7a0b\u5e8f\u6267\u884c\u5176\u95f4\u5b58\u5728\uff0c\u4e0d\u80fd\u5728\u7a0b\u5e8f\u7684\u9884\u5904\u7406\u58f0\u660e\u9636\u6bb5\u7d22\u5f15\u5230\u5b83\u4eec<\/strong>\u3002\u9884\u5904\u7406\u58f0\u660e\u533a\u57df\u662f\u5f53\u524d\u4f1a\u8bdd\uff0c\u800c\u4e0d\u662f\u88ab\u5b58\u50a8\u7684\u7a0b\u5e8f\uff0c\u6240\u4ee5\u8fd9\u4e2a\u58f0\u660e\u80fd\u5728\u7a0b\u5e8f\u7ed3\u675f\u540e\u88ab\u6267\u884c\uff0c\u5728\u8fd9\u4e2a\u9636\u6bb5\u7684\u53d8\u91cf\u5e76\u4e0d\u5728\u5176\u4f5c\u7528\u57df\u3002\uff08Prepared statement scope is the current session, not the stored program, so the statement could be executed after the program ends, at which point the variables would no longer be in scope. \uff09\u4f8b\u5982\uff0cSELECT … INTO local_var<\/em><\/strong>\u4e0d\u80fd\u7528\u4e8e\u9884\u5904\u7406\u9636\u6bb5\u3002\u8fd9\u4e2a\u9650\u5236\u540c\u6837\u7528\u4e8e\u5b58\u50a8\u8fc7\u7a0b\u548c\u51fd\u6570\u7684\u53c2\u6570\u3002\uff08See Section\u00a013.5.1, \u201cPREPARE Syntax\u201d<\/a>.\uff09<\/p>\n

\u672c\u5730\u53d8\u91cf\u4e0d\u80fd\u540c\u540d\u3002\u5982\u679c\u4e00\u4e2aSQL\u58f0\u660e\uff0c\u5982SELECT INTO\u58f0\u660e\uff0c\u5305\u542b\u4e86\u4e00\u4e2a\u5217\u548c\u4e00\u4e2a\u540c\u540d\u7684\u672c\u5730\u53d8\u91cf\uff0cMYSQL\u4f1a\u89e3\u91ca\u6210\u53d8\u91cf\u7684\u540d\u5b57\u3002\u8003\u8651\u4e0b\u9762\u7684\u8fc7\u7a0b\u5b9a\u4e49\uff1a<\/p>\n

CREATE<\/span> PROCEDURE<\/span> sp1 (<\/span>x VARCHAR<\/span>(<\/span>5<\/span>)<\/span>)<\/span>\r\nBEGIN<\/span>\r\n  DECLARE<\/span> xname VARCHAR<\/span>(<\/span>5<\/span>)<\/span> DEFAULT<\/span> 'bob'<\/span>;<\/span>\r\n  DECLARE<\/span> newname VARCHAR<\/span>(<\/span>5<\/span>)<\/span>;<\/span>\r\n  DECLARE<\/span> xid<\/span> INT<\/span>;<\/span>\r\n\r\n  SELECT<\/span> xname,<\/span> id INTO<\/span> newname,<\/span> xid<\/span>\r\n    FROM<\/span> table1 WHERE<\/span> xname =<\/span> xname;<\/span>\r\n  SELECT<\/span> newname;<\/span>\r\nEND<\/span>;<\/span><\/code><\/pre>\n
MYSQL\u5728SELECT\u8bed\u53e5\u4e2d\u89e3\u91caxname\u4f5c\u4e3a\u53d8\u91cf\uff0c\u800c\u4e0d\u662f\u5217\u540d\u3002\u56e0\u6b64\u5728\u8c03\u7528sp1()\u8fd9\u4e2a\u8fc7\u7a0b\u65f6newname\u8fd4\u56de’bob’\uff0c\u800c\u4e0d\u662ftable1.xname\u5217\u3002<\/p>\n
\u7c7b\u4f3c\u7684\uff0c\u5728\u6e38\u6807\u5b9a\u4e49\u4e2d\uff08\u5305\u542bSELECT\u6307\u5411xname\u58f0\u660e\u7684\u8fc7\u7a0b\uff09\u4e2d\u3002MYSQL\u89e3\u91ca\u4e3a\u53d8\u91cf\u540d\uff0c\u800c\u4e0d\u662f\u5217\u540d\u3002<\/p>\n
CREATE<\/span> PROCEDURE<\/span> sp2 (<\/span>x VARCHAR<\/span>(<\/span>5<\/span>)<\/span>)<\/span>\r\nBEGIN<\/span>\r\n  DECLARE<\/span> xname VARCHAR<\/span>(<\/span>5<\/span>)<\/span> DEFAULT<\/span> 'bob'<\/span>;<\/span>\r\n  DECLARE<\/span> newname VARCHAR<\/span>(<\/span>5<\/span>)<\/span>;<\/span>\r\n  DECLARE<\/span> xid<\/span> INT<\/span>;<\/span>\r\n  DECLARE<\/span> done TINYINT<\/span> DEFAULT<\/span> 0<\/span>;<\/span>\r\n  DECLARE<\/span> cur1 CURSOR<\/span> FOR<\/span> SELECT<\/span> xname,<\/span> id FROM<\/span> table1;<\/span>\r\n  DECLARE<\/span> CONTINUE<\/span> HANDLER<\/span> FOR<\/span> NOT<\/span> FOUND<\/span> SET<\/span> done =<\/span> 1<\/span>;<\/span>\r\n\r\n  OPEN<\/span> cur1;<\/span>\r\n  read_loop: LOOP<\/span>\r\n    FETCH<\/span> FROM<\/span> cur1 INTO<\/span> newname,<\/span> xid<\/span>;<\/span>\r\n    IF<\/span> done THEN<\/span> LEAVE<\/span> read_loop;<\/span> END<\/span> IF<\/span>;<\/span>\r\n    SELECT<\/span> newname;<\/span>\r\n  END<\/span> LOOP<\/span>;<\/span>\r\n  CLOSE<\/span> cur1;<\/span>\r\nEND<\/span>;<\/span><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u672c\u5730\u53d8\u91cf\u7684\u533a\u57df\u662f\u5176\u6240\u5b9a\u4e49\u7684BEGIN … END\u5757\u4e2d\u3002\u672c\u5730\u53d8\u91cf\u53ef\u4ee5\u5728\u5176\u5d4c\u5957\u7684\u5185\u5c42\u88ab\u7d22\u5f15\u5230\uff0c\u9664\u975e\u5185\u5c42\u4e5f\u5b9a\u4e49\u4e86\u540c\u540d\u7684\u53d8\u91cf\u3002 \u56e0\u4e3a\u672c\u5730\u53d8\u91cf\u4ec5\u5728\u5b58\u50a8\u7684\u7a0b\u5e8f\u6267…<\/p>\n
 Read More  Read More<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[37],"tags":[],"class_list":["post-1012","post","type-post","status-publish","format-standard","hentry","category-mysql"],"_links":{"self":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/1012","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1012"}],"version-history":[{"count":3,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/1012\/revisions"}],"predecessor-version":[{"id":1015,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=\/wp\/v2\/posts\/1012\/revisions\/1015"}],"wp:attachment":[{"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1012"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1012"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.5x44.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1012"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}