{"id":1487,"date":"2026-01-08T14:37:00","date_gmt":"2026-01-08T06:37:00","guid":{"rendered":"https:\/\/blog.humh.cn\/?p=1487"},"modified":"2026-08-24T14:38:01","modified_gmt":"2026-08-24T06:38:01","slug":"pg%e7%9b%b8%e4%bc%bc%e5%ba%a6%e5%8c%b9%e9%85%8d%e4%b8%8e%e6%b7%b7%e5%90%88%e6%a3%80%e7%b4%a2","status":"publish","type":"post","link":"https:\/\/blog.humh.cn\/?p=1487","title":{"rendered":"pg\u76f8\u4f3c\u5ea6\u5339\u914d\u4e0e\u6df7\u5408\u68c0\u7d22"},"content":{"rendered":"\n<p>\u7ed9\u5b9a\u4e00\u53e5\u8bdd\uff08\u5b57\u7b26\u4e32\uff09\uff0c\u5bf9\u6bd4\u300c\u6587\u672c\u7684\u5b57\u7b26\u76f8\u4f3c\u5ea6\u6392\u5e8f\u7ed3\u679c\u300d\u4e0e\u300c\u6587\u672c\u7684\u8bed\u4e49\u76f8\u4f3c\u5ea6\u6392\u5e8f\u7ed3\u679c\u300d<\/p>\n\n\n\n<p><strong>\u52a0\u6743\u6df7\u5408\u6392\u5e8f<\/strong><\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">-- \u52a0\u6743\u6df7\u5408\uff08\u771f\u5b9e\u5411\u91cf\u503c\u5f85\u586b\u5145\uff09\nSELECT id,\n       (0.7 * (1 - (embedding &lt;-> '[-0.03900614008307457, ]'::vector)) + 0.3 * (ts_rank(to_tsvector('testzhcfg', content), plainto_tsquery('testzhcfg', '\u5728\u54ea\u91cc\u67e5\u770b\u4e2a\u4eba\u7b49\u7ea7')))) as mixed_score,\n       1 - (embedding &lt;-> '[-0.03900614008307457, ]'::vector) AS similarity,\n       ts_rank(to_tsvector('testzhcfg', content), plainto_tsquery('testzhcfg', '\u5728\u54ea\u91cc\u67e5\u770b\u4e2a\u4eba\u7b49\u7ea7')) AS rank,\n       content,\n       answer\nFROM documents\n-- where answer is null\nORDER BY mixed_score DESC\nOFFSET 0\nLIMIT 50\n;<\/pre>\n\n\n\n<ul><li>\u201c\u5728\u54ea\u91cc\u67e5\u770b\u4e2a\u4eba\u7b49\u7ea7\u201d\u4e3a\u5ba2\u6237\u7aef\u7528\u6237\u8f93\u5165\u95ee\u9898<\/li><li><code>content<\/code> \u4e3a documents \u8868\u4e2d\u7684\u5b57\u6bb5\uff08\u77e5\u8bc6\u5e93\u5b57\u5178QA\u5bf9\u4e2d\u7684Q\uff09<\/li><li><code>embedding<\/code> \u4e3a documents \u8868\u4e2d\u7684\u5b57\u6bb5\uff08\u4e3a <code>content<\/code> \u5b57\u6bb5\u6587\u672c\u5185\u5bb9\u7ecf\u8fc7\u5411\u91cf\u6a21\u578b\u8f6c\u6362\u540e\u7684\u5411\u91cf\u503c\uff09<\/li><li>-0.03900614008307457 \u4e3a\u201c\u5728\u54ea\u91cc\u67e5\u770b\u4e2a\u4eba\u7b49\u7ea7\u201d\u7ecf\u8fc7\u5411\u91cf\u6a21\u578b\u8f6c\u6362\u540e\u7684\u5411\u91cf\u503c<\/li><\/ul>\n\n\n\n<p>\u7406\u5ff5\u7c7b\u4f3c\u4e8e&nbsp;<a href=\"https:\/\/help.aliyun.com\/zh\/polardb\/polardb-for-postgresql\/vector-hybrid-retrieval?spm=a2c4g.11186623.help-menu-2249963.d_8_6_1_0.710644e2DW3ofX#0c6c7c6c9a8hl\">https:\/\/help.aliyun.com\/zh\/polardb\/polardb-for-postgresql\/vector-hybrid-retrieval?spm=a2c4g.11186623.help-menu-2249963.d_8_6_1_0.710644e2DW3ofX#0c6c7c6c9a8hl<\/a><\/p>\n\n\n\n<p>\u53ef\u4ee5\u5bf9\u6570\u636e\u91c7\u7528\u5982\u4e0b\u8868\u683c\u5bf9\u7167\u65b9\u5f0f\u8fdb\u884c\u6d4b\u8bd5\uff0c\u4ee5\u6b64\u6765\u9a8c\u8bc1\u5404\u79cd\u641c\u7d22\u6392\u5e8f\u7684\u6548\u679c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>\u6587\u672c\u8f93\u5165<\/th><th>\u5411\u91cf\u503c<\/th><th>\u5b57\u7b26\u76f8\u4f3c\u5ea6\u6392\u5e8f <code>ORDER BY rank DESC, similarity DESC<\/code><\/th><th>\u8bed\u4e49\u76f8\u4f3c\u5ea6\u6392\u5e8f <code>ORDER BY similarity DESC, rank DESC<\/code><\/th><th>\u52a0\u6743\u6df7\u5408\u6392\u5e8f <code>`ORDER BY (0.7 * similarity + 0.3 * rank) DESC`<\/code><\/th><\/tr><\/thead><tbody><tr><td><code>\u5728\u54ea\u91cc\u67e5\u770b\u4e2a\u4eba\u7b49\u7ea7<\/code><\/td><td><\/td><td><\/td><td><\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h1 id=\"postgresql-\u5168\u6587\u641c\u7d22\u4e2d\u6587\u5206\u8bcd\u5339\u914d\u539f\u7406\">PostgreSQL \u5168\u6587\u641c\u7d22\u4e2d\u6587\u5206\u8bcd\u5339\u914d\u539f\u7406<\/h1>\n\n\n\n<p>ts_rank(to_tsvector(&#8216;testzhcfg&#8217;, content), plainto_tsquery(&#8216;testzhcfg&#8217;, %s )) AS rank<\/p>\n\n\n\n<p>tsvector \u6570\u636e\u7c7b\u578b<\/p>\n\n\n\n<h2 id=\"\u51fd\u6570\u5206\u89e3\">\u51fd\u6570\u5206\u89e3<\/h2>\n\n\n\n<h3 id=\"1-to_tsvectorand39testzhcfgand39-content\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">1. <strong><code>to_tsvector('testzhcfg', content)<\/code><\/strong><\/span><\/h3>\n\n\n\n<ul><li><strong>\u4f5c\u7528<\/strong>\uff1a\u5c06\u8868\u4e2d\u7684 content \u6587\u672c\u5b57\u6bb5\u8f6c\u6362\u4e3a\u641c\u7d22\u5411\u91cf<\/li><li><strong>\u4e2d\u6587\u5206\u8bcd<\/strong>\uff1a\u4f7f\u7528 <code>testzhcfg<\/code> \u914d\u7f6e\u8fdb\u884c\u4e2d\u6587\u5206\u8bcd\u5904\u7406<\/li><li><strong>\u5904\u7406\u8fc7\u7a0b<\/strong>\uff1a<ul><li>\u5bf9 content \u5b57\u6bb5\u8fdb\u884c\u4e2d\u6587\u5206\u8bcd<\/li><li>\u79fb\u9664\u505c\u7528\u8bcd\uff08\u5982&#8221;\u7684&#8221;\u3001&#8221;\u4e86&#8221;\u7b49\uff09<\/li><li>\u8bcd\u5e72\u63d0\u53d6\u548c\u6807\u51c6\u5316<\/li><li>\u751f\u6210\u5e26\u6743\u91cd\u7684\u8bcd\u7d20\u5411\u91cf<\/li><\/ul><\/li><\/ul>\n\n\n\n<h3 id=\"2-plainto_tsqueryand39testzhcfgand39-percents\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">2. <strong><code>plainto_tsquery('testzhcfg', %s)<\/code><\/strong><\/span><\/h3>\n\n\n\n<ul><li><strong>\u4f5c\u7528<\/strong>\uff1a\u5c06\u7528\u6237\u8f93\u5165\u7684\u67e5\u8be2\u6587\u672c\u8f6c\u6362\u4e3a\u641c\u7d22\u67e5\u8be2<\/li><li><strong>\u5904\u7406\u65b9\u5f0f<\/strong>\uff1a<ul><li>\u540c\u6837\u4f7f\u7528 <code>testzhcfg<\/code> \u4e2d\u6587\u5206\u8bcd\u914d\u7f6e<\/li><li>\u5c06\u67e5\u8be2\u6587\u672c\u5206\u8bcd\u5904\u7406<\/li><li>\u8f6c\u6362\u4e3a\u53ef\u5339\u914d\u7684\u67e5\u8be2\u683c\u5f0f<\/li><li>\u8bcd\u95f4\u9ed8\u8ba4\u4e3a AND \u903b\u8f91\u5173\u7cfb<\/li><\/ul><\/li><\/ul>\n\n\n\n<h3 id=\"3-ts_rank\"><span class=\"has-inline-color has-vivid-cyan-blue-color\">3. <strong><code>ts_rank()<\/code><\/strong><\/span><\/h3>\n\n\n\n<ul><li><strong>\u8ba1\u7b97\u76f8\u5173\u6027<\/strong>\uff1a\u57fa\u4e8e\u8bcd\u9891\u3001\u6587\u6863\u957f\u5ea6\u3001\u8bcd\u6743\u91cd\u7b49\u56e0\u7d20\u8ba1\u7b97\u5339\u914d\u5f97\u5206<\/li><li><strong>\u8fd4\u56de\u5206\u6570<\/strong>\uff1a\u6570\u503c\u8d8a\u9ad8\u8868\u793a\u5339\u914d\u5ea6\u8d8a\u597d<\/li><\/ul>\n\n\n\n<h2 id=\"\u4e2d\u6587\u5206\u8bcd\u914d\u7f6e\">\u4e2d\u6587\u5206\u8bcd\u914d\u7f6e<\/h2>\n\n\n\n<h3 id=\"testzhcfg-\u914d\u7f6e\"><strong><code>testzhcfg<\/code> \u914d\u7f6e<\/strong><\/h3>\n\n\n\n<ul><li><strong>\u4e2d\u6587\u5206\u8bcd\u5668<\/strong>\uff1a\u4e13\u95e8\u9488\u5bf9\u4e2d\u6587\u6587\u672c\u7684\u5206\u8bcd\u5904\u7406<\/li><li><strong>\u5206\u8bcd\u7b97\u6cd5<\/strong>\uff1a\u53ef\u80fd\u57fa\u4e8e\u8bcd\u5178\u5339\u914d\u6216\u7edf\u8ba1\u6a21\u578b<\/li><li><strong>\u5904\u7406\u7279\u70b9<\/strong>\uff1a<ul><li>\u80fd\u6b63\u786e\u5904\u7406\u4e2d\u6587\u8bcd\u8bed\u8fb9\u754c<\/li><li>\u652f\u6301\u591a\u5b57\u8bcd\u7684\u8bc6\u522b<\/li><li>\u5904\u7406\u4e2d\u6587\u6807\u70b9\u7b26\u53f7<\/li><\/ul><\/li><\/ul>\n\n\n\n<h2 id=\"\u5339\u914d\u6d41\u7a0b\">\u5339\u914d\u6d41\u7a0b<\/h2>\n\n\n\n<h3 id=\"1-\u9884\u5904\u7406\u9636\u6bb5\">1. <strong>\u9884\u5904\u7406\u9636\u6bb5<\/strong><\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">content\u5b57\u6bb5 \u2192 to_tsvector('testzhcfg') \u2192 \u6807\u51c6\u5316\u8bcd\u7d20\u5411\u91cf\n%s\u8f93\u5165 \u2192 plainto_tsquery('testzhcfg') \u2192 \u67e5\u8be2\u8bcd\u7d20\u5411\u91cf<\/pre>\n\n\n\n<h3 id=\"2-\u5339\u914d\u9636\u6bb5\">2. <strong>\u5339\u914d\u9636\u6bb5<\/strong><\/h3>\n\n\n\n<ul><li>\u5bf9\u6bd4 content \u5411\u91cf\u4e2d\u7684\u8bcd\u7d20\u4e0e\u67e5\u8be2\u5411\u91cf\u4e2d\u7684\u8bcd\u7d20<\/li><li>\u8ba1\u7b97\u8bcd\u7d20\u5339\u914d\u7684\u6570\u91cf\u548c\u9891\u7387<\/li><li>\u8003\u8651\u8bcd\u7d20\u5728\u6587\u6863\u4e2d\u7684\u4f4d\u7f6e\u548c\u6743\u91cd<\/li><\/ul>\n\n\n\n<h3 id=\"3-\u8bc4\u5206\u9636\u6bb5\">3. <strong>\u8bc4\u5206\u9636\u6bb5<\/strong><\/h3>\n\n\n\n<ul><li><strong>\u8bcd\u9891\u56e0\u5b50<\/strong>\uff1a\u67e5\u8be2\u8bcd\u5728\u6587\u6863\u4e2d\u51fa\u73b0\u7684\u9891\u7387<\/li><li><strong>\u6587\u6863\u957f\u5ea6<\/strong>\uff1a\u8f83\u77ed\u6587\u6863\u4e2d\u5339\u914d\u8bcd\u7684\u91cd\u8981\u6027\u66f4\u9ad8<\/li><li><strong>\u8bcd\u6743\u91cd<\/strong>\uff1a\u4e0d\u540c\u8bcd\u7d20\u53ef\u80fd\u6709\u4e0d\u540c\u7684\u6743\u91cd\u8bbe\u7f6e<\/li><\/ul>\n\n\n\n<h2 id=\"\u5b9e\u9645\u793a\u4f8b\">\u5b9e\u9645\u793a\u4f8b<\/h2>\n\n\n\n<h3 id=\"\u5047\u8bbe\u573a\u666f\"><strong>\u5047\u8bbe\u573a\u666f<\/strong><\/h3>\n\n\n\n<ul><li>content = &#8220;\u4eba\u5de5\u667a\u80fd\u6280\u672f\u5728\u533b\u7597\u9886\u57df\u7684\u5e94\u7528&#8221;<\/li><li><code>%s<\/code> = &#8220;\u4eba\u5de5\u667a\u80fd\u533b\u7597&#8221;<\/li><\/ul>\n\n\n\n<h3 id=\"\u5206\u8bcd\u5904\u7406\"><strong>\u5206\u8bcd\u5904\u7406<\/strong><\/h3>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\">content\u5206\u8bcd: [\"\u4eba\u5de5\u667a\u80fd\", \"\u6280\u672f\", \"\u533b\u7597\", \"\u9886\u57df\", \"\u5e94\u7528\"]\n\u67e5\u8be2\u5206\u8bcd: [\"\u4eba\u5de5\u667a\u80fd\", \"\u533b\u7597\"]<\/pre>\n\n\n\n<h3 id=\"\u5339\u914d\u8ba1\u7b97\"><strong>\u5339\u914d\u8ba1\u7b97<\/strong><\/h3>\n\n\n\n<ul><li><strong>\u5339\u914d\u8bcd\u6570<\/strong>\uff1a2\u4e2a\u8bcd\u5339\u914d\uff08&#8221;\u4eba\u5de5\u667a\u80fd&#8221;\u3001&#8221;\u533b\u7597&#8221;\uff09<\/li><li><strong>\u8bcd\u9891\u8ba1\u7b97<\/strong>\uff1a\u6bcf\u4e2a\u8bcd\u5728\u6587\u6863\u4e2d\u7684\u51fa\u73b0\u9891\u7387<\/li><li><strong>\u6700\u7ec8\u5f97\u5206<\/strong>\uff1a\u57fa\u4e8e\u5339\u914d\u5ea6\u548c\u6743\u91cd\u8ba1\u7b97\u7684\u7efc\u5408\u5206\u6570<\/li><\/ul>\n\n\n\n<h2 id=\"\u4f18\u52bf\u7279\u70b9\">\u4f18\u52bf\u7279\u70b9<\/h2>\n\n\n\n<h3 id=\"\u4e2d\u6587\u652f\u6301\"><strong><span class=\"has-inline-color has-vivid-cyan-blue-color\">\u4e2d\u6587\u652f\u6301<\/span><\/strong><\/h3>\n\n\n\n<ul><li>\u4e13\u95e8\u7684\u4e2d\u6587\u5206\u8bcd\u914d\u7f6e\u786e\u4fdd\u51c6\u786e\u5206\u8bcd<\/li><li>\u5904\u7406\u4e2d\u6587\u7279\u6709\u7684\u8bed\u8a00\u7279\u70b9<\/li><\/ul>\n\n\n\n<h3 id=\"\u7075\u6d3b\u5339\u914d\"><strong><span class=\"has-inline-color has-vivid-cyan-blue-color\">\u7075\u6d3b\u5339\u914d<\/span><\/strong><\/h3>\n\n\n\n<ul><li>\u652f\u6301\u90e8\u5206\u5339\u914d\u548c\u6a21\u7cca\u5339\u914d<\/li><li>\u4e0d\u8981\u6c42\u5b8c\u5168\u7cbe\u786e\u7684\u5b57\u7b26\u4e32\u5339\u914d<\/li><\/ul>\n\n\n\n<h3 id=\"\u76f8\u5173\u6027\u6392\u5e8f\"><strong><span class=\"has-inline-color has-vivid-cyan-blue-color\">\u76f8\u5173\u6027\u6392\u5e8f<\/span><\/strong><\/h3>\n\n\n\n<ul><li>\u901a\u8fc7 rank \u5206\u6570\u5b9e\u73b0\u7ed3\u679c\u6392\u5e8f<\/li><li>\u8fd4\u56de\u6700\u76f8\u5173\u7684\u6587\u6863\u4f18\u5148<\/li><\/ul>\n\n\n\n<h3 id=\"text-embedding-v4\u5e95\u5c42\u539f\u7406\u53ca\u8f93\u5165\u5904\u7406\u5206\u6790\"><strong>text-embedding-v4\u5e95\u5c42\u539f\u7406\u53ca\u8f93\u5165\u5904\u7406\u5206\u6790<\/strong><\/h3>\n\n\n\n<p>text-embedding-v4\u662f\u57fa\u4e8e<strong>Transformer\u67b6\u6784<\/strong>\u7684\u9884\u8bad\u7ec3\u8bed\u8a00\u6a21\u578b\uff0c\u5c5e\u4e8eQwen3-Embedding\u7cfb\u5217\u3002\u5176\u6838\u5fc3\u539f\u7406\u662f\u901a\u8fc7<strong>\u6df1\u5ea6\u795e\u7ecf\u7f51\u7edc<\/strong>\u5c06\u6587\u672c\u6620\u5c04\u4e3a<strong>\u9ad8\u7ef4\u5411\u91cf<\/strong>\uff08\u9ed8\u8ba41024\u7ef4\uff09\uff0c\u8be5\u5411\u91cf\u80fd\u6355\u6349\u6587\u672c\u7684\u8bed\u4e49\u3001\u8bed\u6cd5\u53ca\u4e0a\u4e0b\u6587\u4fe1\u606f\u3002\u4ee5\u4e0b\u662f\u5173\u952e\u673a\u5236\uff1a<\/p>\n\n\n\n<h4 id=\"1-\u6587\u672c\u5411\u91cf\u5316\u6d41\u7a0b\"><strong><span class=\"has-inline-color has-vivid-cyan-blue-color\">1. \u6587\u672c\u5411\u91cf\u5316\u6d41\u7a0b<\/span><\/strong><\/h4>\n\n\n\n<p>\u5f53\u8f93\u5165\u6587\u672c\u201c\u600e\u4e48\u5145\u4f1a\u5458\u201d\u65f6\uff0c\u6a21\u578b\u4f1a\u6267\u884c\u4ee5\u4e0b\u6b65\u9aa4\uff1a<\/p>\n\n\n\n<ul><li><strong>\u5206\u8bcd\u4e0e\u7f16\u7801<\/strong>\uff1a\u5c06\u6587\u672c\u62c6\u5206\u4e3a\u8bcd\u8bed\u6216\u5b50\u8bcd\u5355\u5143\uff08\u5982\u201c\u600e\u4e48\u201d\u201c\u5145\u201d\u201c\u4f1a\u5458\u201d\uff09\uff0c\u5e76\u8f6c\u6362\u4e3a\u6a21\u578b\u53ef\u5904\u7406\u7684\u6570\u5b57ID\u5e8f\u5217\u3002<\/li><li><strong>\u4e0a\u4e0b\u6587\u5d4c\u5165<\/strong>\uff1a\u901a\u8fc7Transformer\u7684<strong>\u591a\u5934\u81ea\u6ce8\u610f\u529b\u673a\u5236<\/strong>\uff0c\u4e3a\u6bcf\u4e2a\u8bcd\u751f\u6210\u5305\u542b\u4e0a\u4e0b\u6587\u4fe1\u606f\u7684<strong>\u8bcd\u5411\u91cf<\/strong>\u3002\u4f8b\u5982\uff0c\u201c\u5145\u201d\u5728\u201c\u5145\u4f1a\u5458\u201d\u4e2d\u7684\u8bed\u4e49\u4f1a\u7ed3\u5408\u524d\u540e\u6587\u88ab\u7406\u89e3\u4e3a\u201c\u8d2d\u4e70\u201d\u6216\u201c\u5f00\u901a\u201d\u7684\u542b\u4e49\u3002<\/li><li><strong>\u805a\u5408\u5411\u91cf<\/strong>\uff1a\u5c06\u6240\u6709\u8bcd\u5411\u91cf\u878d\u5408\u4e3a\u4e00\u4e2a\u56fa\u5b9a\u7ef4\u5ea6\u7684<strong>\u6587\u672c\u5411\u91cf<\/strong>\uff08\u59821024\u7ef4\uff09\uff0c\u8be5\u5411\u91cf\u7efc\u5408\u8868\u5f81\u6574\u4e2a\u53e5\u5b50\u7684\u8bed\u4e49\u3002<\/li><\/ul>\n\n\n\n<h4 id=\"2-\u662f\u5426\u8fdb\u884c\u540c\u4e49\u8bcd\u5206\u6790\uff1f\"><strong><span class=\"has-inline-color has-vivid-cyan-blue-color\">2. \u662f\u5426\u8fdb\u884c\u540c\u4e49\u8bcd\u5206\u6790\uff1f<\/span><\/strong><\/h4>\n\n\n\n<p><strong>\u662f\u7684\uff0c\u6a21\u578b\u4f1a\u9690\u5f0f\u6355\u6349\u540c\u4e49\u8bcd\u7684\u8bed\u4e49\u5173\u8054<\/strong>\uff0c\u4f46<strong>\u4e0d\u4f1a\u663e\u5f0f\u5c06\u6587\u672c\u66ff\u6362\u4e3a\u540c\u4e49\u8bcd<\/strong>\uff08\u5982\u201c\u5145\u201d\u8f6c\u4e3a\u201c\u8d2d\u4e70\u201d\uff09\u3002\u5176\u539f\u7406\u5982\u4e0b\uff1a<\/p>\n\n\n\n<ul><li><strong>\u8bed\u4e49\u8868\u5f81\u80fd\u529b<\/strong>\uff1a\u901a\u8fc7\u9884\u8bad\u7ec3\u5b66\u4e60\u5927\u89c4\u6a21\u6587\u672c\u6570\u636e\uff0c\u6a21\u578b\u5df2\u638c\u63e1\u8bcd\u8bed\u95f4\u7684\u8bed\u4e49\u76f8\u4f3c\u6027\u3002\u4f8b\u5982\uff0c\u201c\u5145\u4f1a\u5458\u201d\u4e0e\u201c\u8d2d\u4e70\u4f1a\u5458\u201d\u201c\u5f00\u901a\u4f1a\u5458\u201d\u7b49\u8868\u8fbe\u4f1a\u5728\u5411\u91cf\u7a7a\u95f4\u4e2d\u5f62\u6210<strong>\u8bed\u4e49\u90bb\u8fd1<\/strong>\u7684\u5411\u91cf\uff08\u4f59\u5f26\u76f8\u4f3c\u5ea6\u9ad8\uff09\u3002<\/li><li><strong>\u4efb\u52a1\u6307\u4ee4\u4f18\u5316<\/strong>\uff08\u5982\u6587\u6863\u30101\u3011\u6240\u8ff0\uff09\uff1a\u82e5\u7ed3\u5408\u4efb\u52a1\u6307\u4ee4\uff08instruct\u53c2\u6570\uff09\uff0c\u6a21\u578b\u53ef\u8fdb\u4e00\u6b65\u805a\u7126\u7279\u5b9a\u573a\u666f\uff08\u5982\u4f1a\u5458\u5145\u503c\u6d41\u7a0b\uff09\uff0c\u63d0\u5347\u5411\u91cf\u5bf9\u68c0\u7d22\u9700\u6c42\u7684\u5339\u914d\u5ea6\u3002<\/li><\/ul>\n\n\n\n<h4 id=\"3-\u8f93\u5165\u600e\u4e48\u5145\u4f1a\u5458\u7684\u7ed3\u679c\u793a\u4f8b\"><strong><span class=\"has-inline-color has-vivid-cyan-blue-color\">3. \u8f93\u5165\u201c\u600e\u4e48\u5145\u4f1a\u5458\u201d\u7684\u7ed3\u679c\u793a\u4f8b<\/span><\/strong><\/h4>\n\n\n\n<p>\u5047\u8bbe\u4f7f\u7528\u9ed8\u8ba41024\u7ef4\u5411\u91cf\uff1a<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\" data-enlighter-language=\"generic\" data-enlighter-theme=\"\" data-enlighter-highlight=\"\" data-enlighter-linenumbers=\"\" data-enlighter-lineoffset=\"\" data-enlighter-title=\"\" data-enlighter-group=\"\"># \u8c03\u7528\u793a\u4f8b\uff08\u53c2\u8003\u6587\u6863\u30101\u3011\u548c\u30105\u3011\uff09\nresp = dashscope.TextEmbedding.call(\n    model=\"text-embedding-v4\",\n    input=\"\u600e\u4e48\u5145\u4f1a\u5458\",\n    dimension=1024\n)\nvector = resp.output['embeddings'][0]['embedding']  # \u957f\u5ea6\u4e3a1024\u7684\u6d6e\u70b9\u6570\u5217\u8868<\/pre>\n\n\n\n<p>\u8be5\u5411\u91cf\u5c06\u4e0e\u201c\u5982\u4f55\u8d2d\u4e70\u4f1a\u5458\u201d\u201c\u4f1a\u5458\u5145\u503c\u6b65\u9aa4\u201d\u7b49\u8bed\u4e49\u76f8\u5173\u6587\u672c\u7684\u5411\u91cf\u5177\u6709\u9ad8\u76f8\u4f3c\u5ea6\uff0c\u4ece\u800c\u652f\u6301<strong>\u8bed\u4e49\u641c\u7d22<\/strong>\u6216<strong>\u5206\u7c7b\u4efb\u52a1<\/strong>\u3002<\/p>\n\n\n\n<h4 id=\"4-\u5173\u952e\u7279\u6027\u4e0e\u9650\u5236\"><strong><span class=\"has-inline-color has-vivid-cyan-blue-color\">4. \u5173\u952e\u7279\u6027\u4e0e\u9650\u5236<\/span><\/strong><\/h4>\n\n\n\n<ul><li><strong>\u5411\u91cf\u7ef4\u5ea6\u53ef\u8c03<\/strong>\uff1a\u652f\u630164~2048\u7ef4\uff08\u6587\u6863\u30101\u3011\uff09\u3002\u66f4\u9ad8\u7ef4\u5ea6\u4fdd\u7559\u66f4\u591a\u7ec6\u8282\uff0c\u4f46\u5b58\u50a8\u6210\u672c\u4e0a\u5347\u3002<\/li><li><strong>\u591a\u8bed\u8a00\u652f\u6301<\/strong>\uff1a\u8986\u76d6100+\u8bed\u79cd\uff0c\u5305\u62ec\u4e2d\u6587\u3001\u82f1\u8bed\u7b49\uff08\u6587\u6863\u30101\u3011\uff09\u3002<\/li><li><strong>\u4efb\u52a1\u6307\u4ee4\u589e\u5f3a<\/strong>\uff1a\u901a\u8fc7<code>instruct<\/code>\u53c2\u6570\u4f18\u5316\u5411\u91cf\u751f\u6210\uff08\u9700SDK\/API\u652f\u6301\uff0c\u6587\u6863\u30101\u3011\uff09\u3002<\/li><li><strong>\u6210\u672c\u4f18\u5316<\/strong>\uff1a\u6279\u91cf\u5904\u7406\uff08Batch\u63a5\u53e3\uff09\u53ef\u964d\u4f4e\u5927\u89c4\u6a21\u6570\u636e\u5904\u7406\u8d39\u7528\uff08\u6587\u6863\u30101\u3011\uff09\u3002<\/li><\/ul>\n\n\n\n<h4 id=\"\u603b\u7ed3\"><strong><span class=\"has-inline-color has-vivid-cyan-blue-color\">\u603b\u7ed3<\/span><\/strong><\/h4>\n\n\n\n<p>text-embedding-v4\u901a\u8fc7\u6df1\u5ea6\u5b66\u4e60\u6a21\u578b\u5c06\u6587\u672c\u8f6c\u5316\u4e3a\u8bed\u4e49\u5411\u91cf\uff0c\u65e0\u9700\u663e\u5f0f\u66ff\u6362\u540c\u4e49\u8bcd\u5373\u53ef\u5b9e\u73b0\u8bed\u4e49\u5173\u8054\u3002\u8f93\u5165\u201c\u600e\u4e48\u5145\u4f1a\u5458\u201d\u751f\u6210\u7684\u5411\u91cf\u80fd\u4e0e\u76f8\u5173\u8bed\u4e49\u8868\u8fbe\uff08\u5982\u201c\u8d2d\u4e70\u4f1a\u5458\u201d\uff09\u5728\u5411\u91cf\u7a7a\u95f4\u4e2d\u5f62\u6210\u805a\u7c7b\uff0c\u4ece\u800c\u652f\u6301\u7cbe\u51c6\u68c0\u7d22\u6216\u63a8\u8350\u3002\u82e5\u9700\u8fdb\u4e00\u6b65\u4f18\u5316\uff0c\u53ef\u901a\u8fc7\u4efb\u52a1\u6307\u4ee4\u660e\u786e\u68c0\u7d22\u610f\u56fe\uff08\u4f8b\u5982\uff1a<code>instruct=\"Retrieve steps for membership recharge\"<\/code>\uff09\u3002<\/p>\n\n\n\n<h2 id=\"\u641c\u7d22\u65b9\u5f0f\u6bd4\u5bf9\">\u641c\u7d22\u65b9\u5f0f\u6bd4\u5bf9<\/h2>\n\n\n\n<p><strong>\u5168\u6587\u641c\u7d22<\/strong>\u7279\u70b9\uff08to_tsvector\uff09<\/p>\n\n\n\n<ul><li>PostgreSQL \u5185\u7f6e\u7684\u5168\u6587\u641c\u7d22\u529f\u80fd<\/li><li>\u57fa\u4e8e\u5173\u952e\u8bcd\u5339\u914d\uff1a\u4f7f\u7528\u5206\u8bcd\u5668\u5904\u7406\u6587\u672c<\/li><li>\u8bed\u4e49\u7406\u89e3\u6709\u9650\uff1a\u53ea\u5339\u914d\u8bcd\u7d20\uff0c\u4e0d\u7406\u89e3\u8bed\u4e49\u76f8\u4f3c\u6027<\/li><li>\u901f\u5ea6\u5feb\uff1a\u9002\u5408\u7cbe\u786e\u5173\u952e\u8bcd\u641c\u7d22<\/li><li>\u652f\u6301\u4e2d\u6587\u5206\u8bcd\uff1a&#8217;testzhcfg&#8217; \u914d\u7f6e\u4e13\u95e8\u5904\u7406\u4e2d\u6587<\/li><\/ul>\n\n\n\n<p><strong>\u5411\u91cf\u641c\u7d22<\/strong>\u7279\u70b9\uff08embedding &lt;-&gt; %s::vector\uff09<\/p>\n\n\n\n<ul><li>vector \u6570\u636e\u7c7b\u578b\uff08PGVector \u6269\u5c55\uff09<\/li><li>\u57fa\u4e8e\u8bed\u4e49\u76f8\u4f3c\u6027\uff1a\u57fa\u4e8e\u6b27\u51e0\u91cc\u5f97\u5411\u91cf\u8ddd\u79bb\u3001\u4f59\u5f26\u76f8\u4f3c\u5ea6\u7b49\u8ba1\u7b97\u8bed\u4e49\u76f8\u4f3c\u6027<\/li><li>\u8bed\u4e49\u7406\u89e3\u5f3a\uff1a\u80fd\u627e\u51fa\u8bed\u4e49\u76f8\u5173\u4f46\u5173\u952e\u8bcd\u4e0d\u540c\u7684\u5185\u5bb9<\/li><li>\u9700\u8981\u9884\u8ba1\u7b97\uff1a\u6587\u6863\u9700\u63d0\u524d\u8f6c\u6362\u4e3a\u5411\u91cf\u5d4c\u5165<\/li><li>\u4f7f\u7528 &lt;-&gt; \u64cd\u4f5c\u7b26\uff1a\u8ba1\u7b97\u5411\u91cf\u95f4\u7684\u8ddd\u79bb<\/li><\/ul>\n\n\n\n<p>tsvector \u2260 PGVector \u7684 vector<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u7ed9\u5b9a\u4e00\u53e5\u8bdd\uff08\u5b57\u7b26\u4e32\uff09\uff0c\u5bf9\u6bd4\u300c\u6587\u672c\u7684\u5b57\u7b26\u76f8\u4f3c\u5ea6\u6392\u5e8f\u7ed3\u679c\u300d\u4e0e\u300c\u6587\u672c\u7684\u8bed\u4e49\u76f8\u4f3c\u5ea6\u6392\u5e8f\u7ed3\u679c\u300d \u52a0\u6743\u6df7\u5408\u6392\u5e8f \u201c\u5728\u54ea\u91cc\u67e5 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[145],"tags":[141,147,146],"_links":{"self":[{"href":"https:\/\/blog.humh.cn\/index.php?rest_route=\/wp\/v2\/posts\/1487"}],"collection":[{"href":"https:\/\/blog.humh.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.humh.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.humh.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.humh.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1487"}],"version-history":[{"count":2,"href":"https:\/\/blog.humh.cn\/index.php?rest_route=\/wp\/v2\/posts\/1487\/revisions"}],"predecessor-version":[{"id":1489,"href":"https:\/\/blog.humh.cn\/index.php?rest_route=\/wp\/v2\/posts\/1487\/revisions\/1489"}],"wp:attachment":[{"href":"https:\/\/blog.humh.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1487"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.humh.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1487"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.humh.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1487"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}