{"id":312271,"date":"2021-01-14T07:53:14","date_gmt":"2021-01-13T23:53:14","guid":{"rendered":"http:\/\/4563.org\/?p=312271"},"modified":"2021-01-14T07:53:14","modified_gmt":"2021-01-13T23:53:14","slug":"postgressql-%e7%9a%84-returning-%e5%85%b3%e9%94%ae%e5%ad%97%e5%ae%9e%e7%8e%b0%e9%80%bb%e8%be%91%e6%98%af%e6%80%8e%e6%a0%b7%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=312271","title":{"rendered":"postgressql \u7684 returning \u5173\u952e\u5b57\u5b9e\u73b0\u903b\u8f91\u662f\u600e\u6837\uff1f"},"content":{"rendered":"<div>\n<div>\n<div>\n<h1>                  postgressql \u7684 returning \u5173\u952e\u5b57\u5b9e\u73b0\u903b\u8f91\u662f\u600e\u6837\uff1f               <\/h1>\n<p> <\/p>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : leeraya <\/span>  <span><i><\/i> 7<\/span> <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n<div isfirst=\"1\"> <\/p>\n<p>\u5b98\u7f51\u7684 Synopsis\uff1a<\/p>\n<p>[ WITH [ RECURSIVE ] with_query [, &#8230;] ] DELETE FROM [ ONLY ] table_name [ * ] [ [ AS ] alias ] [ USING from_item [, &#8230;] ] [ WHERE condition | WHERE CURRENT OF cursor_name ] [ RETURNING * | output_expression [ [ AS ] output_name ] [, &#8230;] ]<\/p>\n<p>returning \u5b50\u53e5\u53ef\u4ee5\u8fd4\u56de\u5220\u9664\u6570\u636e\u7ed3\u679c\u96c6\u3002 \u90a3\u4e48\u5b83\u7684\u5e95\u5c42\u903b\u8f91\u662f\u600e\u4e48\u6837\u5b9e\u73b0\u7684\u5462\uff0c\u4e3b\u8981\u662f delete rows \u548c table reader \u7684\u8fc7\u7a0b\u5148\u540e\u4e0d\u592a\u80fd\u641e\u6e05\u695a\u3002<\/p>\n<\/p><\/div>\n<div> <b>\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (<span>1<\/span>)        <\/div>\n<div> <\/div>\n<\/p><\/div>\n<\/p><\/div>\n<ul>\n<li data-pid=\"5146788\" data-uid=\"2\">\n<div>\n<div>\n<div> <span>\u8cc7\u6df1\u5927\u4f6c : JimmyChange <\/span>  <\/div>\n<div> <i title=\"\u5f15\u7528\"><\/i>  <span>          <\/span> <\/div>\n<\/p><\/div>\n<div>                                                             \u80af\u5b9a\u662f\u5148\u8bfb\u53d6\u78c1\u76d8\u6570\u636e\u5230\u5185\u5b58\uff0c\u800c\u4e14 PostgreSQL \u7684 MVCC \u9ed8\u8ba4\u662f\u4e0d\u4f1a\u5b9e\u65f6\u7684\u5220\u9664\u6570\u636e\u7684\uff0c\u53ea\u662f\u66f4\u65b0\u6570\u636e\u8bb0\u5f55 cmax \u548c cmin \u7684\u503c\uff0c\u53ef\u4ee5\u7406\u89e3\u4e3a\u6bcf\u4e2a\u6570\u636e\u5e93\u4e8b\u52a1\u90fd\u4f1a\u6709\u4e00\u4e2a\u9012\u589e\u7684 ID\uff0c\u5220\u9664\u7684\u65f6\u5019\u66f4\u65b0\u8bb0\u5f55\uff0c\u8868\u660e\u8fd9\u6761\u6570\u636e\u5728\u88ab\u7b2c N \u4e2a\u4e8b\u52a1\u5220\u9664\uff0c\u6240\u6709 ID \u5927\u4e8e N \u7684\u4e8b\u52a1\u90fd\u770b\u4e0d\u5230\u4e86\uff0c\u771f\u5b9e\u7684\u5220\u9664\u64cd\u4f5c\u5b9e\u5728 Vacuum \u8fc7\u7a0b\u4e2d\u8fdb\u884c\u7684\u3002                                                            <\/div>\n<\/p><\/div>\n<\/li>\n<li>\n","protected":false},"excerpt":{"rendered":"<p>postgressql \u7684 ret&hellip;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/312271"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=312271"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/312271\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=312271"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=312271"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=312271"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}