{"id":178698,"date":"2024-11-08T20:08:28","date_gmt":"2024-11-08T12:08:28","guid":{"rendered":"https:\/\/server.hk\/cnblog\/178698\/"},"modified":"2024-11-08T20:08:28","modified_gmt":"2024-11-08T12:08:28","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%9a2200f-zero_length_character_string%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/178698\/","title":{"rendered":"\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a2200F &#8211; zero_length_character_string\uff1f"},"content":{"rendered":"<h1 id=\"%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%9a2200f-zero_length_character_string%ef%bc%9f-heoIsGKnio\">\u5982\u4f55\u4fee\u5fa9PostgreSQL\u932f\u8aa4\u4ee3\u78bc\uff1a2200F &#8211; zero_length_character_string\uff1f<\/h1>\n<p>\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\u662f2200F\uff0c\u9019\u500b\u932f\u8aa4\u901a\u5e38\u8207\u96f6\u9577\u5ea6\u5b57\u7b26\u5b57\u7b26\u4e32\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<h2 id=\"%e9%8c%af%e8%aa%a4%e4%bb%a3%e7%a2%bc2200f%e7%9a%84%e8%83%8c%e6%99%af-heoIsGKnio\">\u932f\u8aa4\u4ee3\u78bc2200F\u7684\u80cc\u666f<\/h2>\n<p>PostgreSQL\u662f\u4e00\u500b\u5f37\u5927\u7684\u958b\u6e90\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u932f\u8aa4\u4ee3\u78bc2200F\u901a\u5e38\u8868\u793a\u5728\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u51fa\u73fe\u4e86\u4e0d\u6b63\u78ba\u7684\u5b57\u7b26\u5b57\u7b26\u4e32\uff0c\u7279\u5225\u662f\u7576\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u70ba\u96f6\u6642\u3002\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u67e5\u8a62\u5931\u6557\u6216\u6578\u64da\u63d2\u5165\u5931\u6557\uff0c\u5f9e\u800c\u5f71\u97ff\u61c9\u7528\u7a0b\u5e8f\u7684\u6b63\u5e38\u904b\u884c\u3002<\/p>\n<h2 id=\"%e9%80%a0%e6%88%902200f%e9%8c%af%e8%aa%a4%e7%9a%84%e5%b8%b8%e8%a6%8b%e5%8e%9f%e5%9b%a0-heoIsGKnio\">\u9020\u62102200F\u932f\u8aa4\u7684\u5e38\u898b\u539f\u56e0<\/h2>\n<ul>\n<li><strong>\u7a7a\u5b57\u7b26\u4e32\u63d2\u5165\uff1a<\/strong>\u7576\u5617\u8a66\u5c07\u4e00\u500b\u7a7a\u5b57\u7b26\u4e32\u63d2\u5165\u5230\u4e0d\u5141\u8a31\u7a7a\u503c\u7684\u5b57\u6bb5\u6642\uff0c\u6703\u5f15\u767c\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff1a<\/strong>\u5982\u679c\u6578\u64da\u5eab\u5b57\u6bb5\u7684\u985e\u578b\u8207\u63d2\u5165\u7684\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\uff0c\u4e5f\u53ef\u80fd\u5c0e\u81f4\u6b64\u932f\u8aa4\u3002<\/li>\n<li><strong>\u67e5\u8a62\u8a9e\u6cd5\u932f\u8aa4\uff1a<\/strong>\u4e0d\u6b63\u78ba\u7684SQL\u67e5\u8a62\u8a9e\u6cd5\u53ef\u80fd\u6703\u5c0e\u81f4PostgreSQL\u7121\u6cd5\u6b63\u78ba\u89e3\u6790\u5b57\u7b26\u4e32\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e4%bf%ae%e5%be%a92200f%e9%8c%af%e8%aa%a4-heoIsGKnio\">\u5982\u4f55\u4fee\u5fa92200F\u932f\u8aa4<\/h2>\n<p>\u4fee\u5fa9PostgreSQL\u76842200F\u932f\u8aa4\u9700\u8981\u91dd\u5c0d\u5177\u9ad4\u60c5\u6cc1\u9032\u884c\u8abf\u6574\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u89e3\u6c7a\u65b9\u6848\uff1a<\/p>\n<h3 id=\"1-%e6%aa%a2%e6%9f%a5%e6%95%b8%e6%93%9a%e6%8f%92%e5%85%a5%e7%9a%84%e5%ad%97%e7%ac%a6%e4%b8%b2-heoIsGKnio\">1. \u6aa2\u67e5\u6578\u64da\u63d2\u5165\u7684\u5b57\u7b26\u4e32<\/h3>\n<p>\u9996\u5148\uff0c\u6aa2\u67e5\u60a8\u5617\u8a66\u63d2\u5165\u7684\u5b57\u7b26\u4e32\u662f\u5426\u70ba\u7a7a\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\u4f86\u6aa2\u67e5\u6578\u64da\uff1a<\/p>\n<pre><code>SELECT * FROM your_table WHERE your_column = '';<\/code><\/pre>\n<p>\u5982\u679c\u67e5\u8a62\u8fd4\u56de\u7d50\u679c\uff0c\u5247\u8868\u793a\u5b58\u5728\u7a7a\u5b57\u7b26\u4e32\u3002\u60a8\u9700\u8981\u78ba\u4fdd\u5728\u63d2\u5165\u6578\u64da\u6642\u4e0d\u4f7f\u7528\u7a7a\u5b57\u7b26\u4e32\u3002<\/p>\n<h3 id=\"2-%e7%a2%ba%e4%bf%9d%e6%95%b8%e6%93%9a%e9%a1%9e%e5%9e%8b%e5%8c%b9%e9%85%8d-heoIsGKnio\">2. \u78ba\u4fdd\u6578\u64da\u985e\u578b\u5339\u914d<\/h3>\n<p>\u6aa2\u67e5\u6578\u64da\u5eab\u4e2d\u5b57\u6bb5\u7684\u6578\u64da\u985e\u578b\uff0c\u78ba\u4fdd\u60a8\u63d2\u5165\u7684\u6578\u64da\u985e\u578b\u8207\u5b57\u6bb5\u985e\u578b\u76f8\u7b26\u3002\u4f8b\u5982\uff0c\u5982\u679c\u5b57\u6bb5\u985e\u578b\u70ba\u6574\u6578\uff0c\u5247\u63d2\u5165\u7684\u6578\u64da\u5fc5\u9808\u662f\u6574\u6578\uff1a<\/p>\n<pre><code>INSERT INTO your_table (your_integer_column) VALUES (123);<\/code><\/pre>\n<h3 id=\"3-%e4%bf%ae%e6%ad%a3%e6%9f%a5%e8%a9%a2%e8%aa%9e%e6%b3%95-heoIsGKnio\">3. \u4fee\u6b63\u67e5\u8a62\u8a9e\u6cd5<\/h3>\n<p>\u5982\u679c\u60a8\u767c\u73fe\u67e5\u8a62\u8a9e\u6cd5\u6709\u8aa4\uff0c\u8acb\u4ed4\u7d30\u6aa2\u67e5SQL\u8a9e\u53e5\u7684\u7d50\u69cb\u3002\u78ba\u4fdd\u6240\u6709\u7684\u5b57\u7b26\u4e32\u90fd\u6b63\u78ba\u5f15\u7528\uff0c\u4e26\u4e14\u6c92\u6709\u8a9e\u6cd5\u932f\u8aa4\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM your_table WHERE your_column = 'valid_string';<\/code><\/pre>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-heoIsGKnio\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u70ba\u4e86\u907f\u514d\u672a\u4f86\u51fa\u73fe2200F\u932f\u8aa4\uff0c\u5efa\u8b70\u9075\u5faa\u4ee5\u4e0b\u6700\u4f73\u5be6\u8e10\uff1a<\/p>\n<ul>\n<li>\u5728\u63d2\u5165\u6578\u64da\u4e4b\u524d\uff0c\u59cb\u7d42\u6aa2\u67e5\u5b57\u7b26\u4e32\u7684\u9577\u5ea6\u3002<\/li>\n<li>\u4f7f\u7528\u9069\u7576\u7684\u6578\u64da\u985e\u578b\uff0c\u4e26\u78ba\u4fdd\u6578\u64da\u985e\u578b\u7684\u4e00\u81f4\u6027\u3002<\/li>\n<li>\u5b9a\u671f\u9032\u884c\u6578\u64da\u5eab\u7684\u5065\u5eb7\u6aa2\u67e5\uff0c\u53ca\u6642\u767c\u73fe\u4e26\u4fee\u5fa9\u6f5b\u5728\u554f\u984c\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-heoIsGKnio\">\u7e3d\u7d50<\/h2>\n<p>PostgreSQL\u932f\u8aa4\u4ee3\u78bc2200F &#8211; 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