{"id":178624,"date":"2024-11-08T19:31:19","date_gmt":"2024-11-08T11:31:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178624\/"},"modified":"2024-11-08T19:31:20","modified_gmt":"2024-11-08T11:31:20","slug":"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a9postgresql%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc%ef%bc%9a01008-implicit_zero_bit_padding%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178624\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a01008 – implicit_zero_bit_padding\uff1f"},"content":{"rendered":"

\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a01008 – implicit_zero_bit_padding<\/h1>\n

\u5728\u4f7f\u7528PostgreSQL\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u53ef\u80fd\u6703\u9047\u5230\u5404\u7a2e\u932f\u8aa4\u4ee3\u78bc\uff0c\u5176\u4e2d\u4e4b\u4e00\u5c31\u662f\u932f\u8aa4\u4ee3\u78bc01008\uff0c\u8a72\u932f\u8aa4\u901a\u5e38\u8207\u96b1\u5f0f\u96f6\u4f4d\u586b\u5145\u6709\u95dc\u3002\u9019\u7bc7\u6587\u7ae0\u5c07\u6df1\u5165\u63a2\u8a0e\u9019\u500b\u932f\u8aa4\u7684\u6210\u56e0\u3001\u5f71\u97ff\u4ee5\u53ca\u5982\u4f55\u6709\u6548\u5730\u4fee\u5fa9\u5b83\u3002<\/p>\n

\u932f\u8aa4\u4ee3\u78bc01008\u7684\u6210\u56e0<\/h2>\n

PostgreSQL\u7684\u932f\u8aa4\u4ee3\u78bc01008\u901a\u5e38\u51fa\u73fe\u5728\u6578\u64da\u985e\u578b\u8f49\u63db\u904e\u7a0b\u4e2d\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u4e8c\u9032\u5236\u6578\u64da\u6216\u5b57\u5143\u4e32\u6642\u3002\u7576\u6578\u64da\u5eab\u5617\u8a66\u5c07\u4e00\u500b\u6578\u64da\u985e\u578b\u8f49\u63db\u70ba\u53e6\u4e00\u500b\u4e0d\u517c\u5bb9\u7684\u6578\u64da\u985e\u578b\u6642\uff0c\u53ef\u80fd\u6703\u5c0e\u81f4\u9019\u500b\u932f\u8aa4\u3002\u4f8b\u5982\uff0c\u7576\u4e00\u500b\u6574\u6578\u88ab\u8f49\u63db\u70ba\u5b57\u5143\u4e32\u6642\uff0c\u5982\u679c\u6574\u6578\u7684\u4f4d\u6578\u8d85\u904e\u4e86\u5b57\u5143\u4e32\u7684\u9650\u5236\uff0c\u5c31\u6703\u51fa\u73fe\u96b1\u5f0f\u96f6\u4f4d\u586b\u5145\u7684\u554f\u984c\u3002<\/p>\n

\u932f\u8aa4\u7684\u5f71\u97ff<\/h2>\n

\u9019\u500b\u932f\u8aa4\u53ef\u80fd\u6703\u5c0e\u81f4\u6578\u64da\u5eab\u67e5\u8a62\u5931\u6557\uff0c\u5f71\u97ff\u61c9\u7528\u7a0b\u5e8f\u7684\u6b63\u5e38\u904b\u884c\u3002\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u9019\u7a2e\u932f\u8aa4\u53ef\u80fd\u6703\u5c0e\u81f4\u6027\u80fd\u4e0b\u964d\uff0c\u751a\u81f3\u4f7f\u6578\u64da\u5eab\u7121\u6cd5\u6b63\u5e38\u97ff\u61c9\u8acb\u6c42\u3002\u56e0\u6b64\uff0c\u53ca\u6642\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002<\/p>\n

\u4fee\u5fa9\u65b9\u6cd5<\/h2>\n

1. \u6aa2\u67e5\u6578\u64da\u985e\u578b<\/h3>\n

\u9996\u5148\uff0c\u6aa2\u67e5\u5c0e\u81f4\u932f\u8aa4\u7684\u67e5\u8a62\u6216\u64cd\u4f5c\u4e2d\u6d89\u53ca\u7684\u6578\u64da\u985e\u578b\u3002\u78ba\u4fdd\u6578\u64da\u985e\u578b\u4e4b\u9593\u7684\u8f49\u63db\u662f\u5408\u7406\u7684\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u6b63\u5728\u5c07\u6574\u6578\u8f49\u63db\u70ba\u5b57\u5143\u4e32\uff0c\u8acb\u78ba\u8a8d\u6574\u6578\u7684\u4f4d\u6578\u4e0d\u6703\u8d85\u904e\u5b57\u5143\u4e32\u7684\u6700\u5927\u9577\u5ea6\u3002<\/p>\n

SELECT CAST(your_integer AS VARCHAR(10)) FROM your_table;<\/code><\/pre>\n
2. \u4f7f\u7528\u986f\u5f0f\u8f49\u63db<\/h3>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u986f\u5f0f\u8f49\u63db\u53ef\u4ee5\u907f\u514d\u96b1\u5f0f\u96f6\u4f4d\u586b\u5145\u7684\u554f\u984c\u3002\u4f7f\u7528CAST\u6216::\u904b\u7b97\u7b26\u9032\u884c\u986f\u5f0f\u8f49\u63db\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u63a7\u5236\u6578\u64da\u985e\u578b\u7684\u8f49\u63db\u904e\u7a0b\u3002<\/p>\n
SELECT your_integer::VARCHAR FROM your_table;<\/code><\/pre>\n
3. \u66f4\u65b0PostgreSQL\u7248\u672c<\/h3>\n
\u6709\u6642\u5019\uff0c\u932f\u8aa4\u53ef\u80fd\u662f\u7531\u65bcPostgreSQL\u7684\u67d0\u500b\u7248\u672c\u4e2d\u7684bug\u5f15\u8d77\u7684\u3002\u6aa2\u67e5\u4f60\u4f7f\u7528\u7684PostgreSQL\u7248\u672c\uff0c\u4e26\u8003\u616e\u5347\u7d1a\u5230\u6700\u65b0\u7248\u672c\uff0c\u4ee5\u7372\u5f97\u66f4\u597d\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n
4. \u6aa2\u67e5\u6578\u64da\u5b8c\u6574\u6027<\/h3>\n
\u78ba\u4fdd\u6578\u64da\u5eab\u4e2d\u7684\u6578\u64da\u5b8c\u6574\u6027\uff0c\u7279\u5225\u662f\u5728\u9032\u884c\u6578\u64da\u5c0e\u5165\u6216\u8f49\u63db\u6642\u3002\u4f7f\u7528\u7d04\u675f\u689d\u4ef6\u4f86\u9650\u5236\u6578\u64da\u7684\u7bc4\u570d\u548c\u985e\u578b\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u6e1b\u5c11\u6b64\u985e\u932f\u8aa4\u7684\u767c\u751f\u3002<\/p>\n
ALTER TABLE your_table ADD CONSTRAINT your_constraint CHECK (your_column BETWEEN 0 AND 9999999999);<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
PostgreSQL\u932f\u8aa4\u4ee3\u78bc01008 – implicit_zero_bit_padding\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u901a\u5e38\u8207\u6578\u64da\u985e\u578b\u8f49\u63db\u6709\u95dc\u3002\u901a\u904e\u6aa2\u67e5\u6578\u64da\u985e\u578b\u3001\u4f7f\u7528\u986f\u5f0f\u8f49\u63db\u3001\u66f4\u65b0PostgreSQL\u7248\u672c\u4ee5\u53ca\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\uff0c\u53ef\u4ee5\u6709\u6548\u5730\u4fee\u5fa9\u9019\u500b\u932f\u8aa4\u3002\u5c0d\u65bc\u9700\u8981\u7a69\u5b9a\u548c\u9ad8\u6548\u6578\u64da\u5eab\u670d\u52d9\u7684\u7528\u6236\uff0c\u9078\u64c7\u5408\u9069\u7684 VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u662f\u81f3\u95dc\u91cd\u8981\u7684\u3002\u4e86\u89e3\u66f4\u591a\u95dc\u65bc \u9999\u6e2fVPS<\/a> \u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u4e86\u89e3\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc01008\uff1aimplicit_zero_bit_padding\uff0c\u89e3\u6c7a\u6578\u64da\u5eab\u67e5\u8a62\u4e2d\u7684\u4f4d\u5143\u7d44\u586b\u5145\u554f\u984c\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-178624","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178624","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=178624"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178624\/revisions"}],"predecessor-version":[{"id":178625,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/178624\/revisions\/178625"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=178624"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=178624"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=178624"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}