{"id":2136,"date":"2025-07-11T10:54:21","date_gmt":"2025-07-11T02:54:21","guid":{"rendered":"http:\/\/www.821121.com\/?p=2136"},"modified":"2026-04-23T22:51:09","modified_gmt":"2026-04-23T14:51:09","slug":"%e7%94%a823ai-%e5%8e%9f%e7%94%9f%e5%90%91%e9%87%8f%e5%bc%95%e6%93%8e%e6%90%ad%e5%bb%ba-%e6%96%87%e6%9c%ac%e8%af%ad%e4%b9%89%e6%a3%80%e7%b4%a2%e7%b3%bb%e7%bb%9f","status":"publish","type":"post","link":"http:\/\/www.821121.com\/?p=2136","title":{"rendered":"\u752823ai \u539f\u751f\u5411\u91cf\u5f15\u64ce\u642d\u5efa \u201c\u6587\u672c\u8bed\u4e49\u68c0\u7d22\u7cfb\u7edf\u201d"},"content":{"rendered":"<h2>\u4e00\u3001\u573a\u666f\u80cc\u666f\u4e0e\u67b6\u6784\u8bbe\u8ba1<\/h2>\n<ul>\n<li>\n<p>\u573a\u666f\u9700\u6c42\uff1a<br \/>\n\u4f01\u4e1a\u5185\u90e8\u5b58\u50a8\u4e86\u5927\u91cf PDF\/Word \u6587\u6863\uff08\u4ea7\u54c1\u624b\u518c\u3001\u5236\u5ea6\u6587\u4ef6\u3001\u57f9\u8bad\u8d44\u6599\uff09\uff0c\u5458\u5de5\u9700\u901a\u8fc7\u81ea\u7136\u8bed\u8a00\u63d0\u95ee\uff0c\u5feb\u901f\u627e\u5230\u8bed\u4e49\u76f8\u4f3c\u7684\u6587\u6863\u5185\u5bb9\uff0c\u66ff\u4ee3\u4f20\u7edf\u7684\u5173\u952e\u8bcd\u68c0\u7d22\uff08\u7cbe\u51c6\u5ea6\u4f4e\u3001\u65e0\u6cd5\u7406\u89e3\u8bed\u4e49\uff09\u3002<\/p>\n<\/li>\n<li>\n<p>\u67b6\u6784\u8bbe\u8ba1\uff1a<br \/>\n\u91c7\u7528 Oracle 23ai \u539f\u751f\u5411\u91cf\u5f15\u64ce\u4f5c\u4e3a\u6838\u5fc3\uff0c\u6574\u4f53\u6d41\u7a0b\u7b80\u5355\u6e05\u6670\uff1a<br \/>\n\u6587\u6863\u9884\u5904\u7406\uff1a\u5c06 PDF\/Word \u6587\u6863\u62c6\u5206\u4e3a\u6587\u672c\u5757\uff08\u89e3\u51b3\u957f\u6587\u672c\u8bed\u4e49\u5272\u88c2\u95ee\u9898\uff09\uff1b<br \/>\n\u5411\u91cf\u751f\u6210\uff1a\u5728 Oracle \u6570\u636e\u5e93\u5185\u8c03\u7528VECTOR_EMBEDDING\u51fd\u6570\uff0c\u751f\u6210\u6587\u672c\u5757\u7684\u5d4c\u5165\u5411\u91cf\uff1b<br \/>\n\u7d22\u5f15\u521b\u5efa\uff1a\u4e3a\u5411\u91cf\u5217\u521b\u5efa HNSW \u7d22\u5f15\uff08\u9002\u914d\u6587\u672c\u68c0\u7d22\u7684\u9ad8\u53ec\u56de\u7387\u9700\u6c42\uff09\uff1b<br \/>\n\u8bed\u4e49\u68c0\u7d22\uff1a\u7528\u6237\u8f93\u5165\u81ea\u7136\u8bed\u8a00\u95ee\u9898\uff0c\u751f\u6210\u5411\u91cf\u540e\uff0c\u5728\u6570\u636e\u5e93\u5185\u6267\u884c\u76f8\u4f3c\u68c0\u7d22\uff1b<br \/>\n\u7ed3\u679c\u5c55\u793a\uff1a\u5c06\u68c0\u7d22\u5230\u7684\u6587\u672c\u5757\u4e0e\u539f\u6587\u6863\u5173\u8054\uff0c\u8fd4\u56de\u7ed9\u7528\u6237\u67e5\u770b\u3002<\/p>\n<h2>\u4e8c\u3001\u5b9e\u6218\u6b65\u9aa4\uff1a\u4ece 0 \u5230 1 \u642d\u5efa\u8bed\u4e49\u68c0\u7d22\u7cfb\u7edf<\/h2>\n<\/li>\n<li>\n<p>\u6b65\u9aa4 1\uff1a\u73af\u5883\u51c6\u5907\u4e0e\u6743\u9650\u914d\u7f6e<br \/>\n\u786e\u4fdd Oracle 23ai \u6570\u636e\u5e93\u5df2\u5b89\u88c5\u5e76\u542f\u7528\u539f\u751f\u5411\u91cf\u5f15\u64ce\uff0823ai \u9ed8\u8ba4\u5f00\u542f\uff0c\u65e0\u9700\u989d\u5916\u914d\u7f6e\uff09\uff1b<br \/>\n\u521b\u5efa\u4e13\u7528 schema \u4e0e\u7528\u6237\uff0c\u6388\u4e88\u5fc5\u8981\u6743\u9650\uff1a<\/p>\n<pre><code class=\"language-sql\">-- \u521b\u5efa\u7528\u6237\nCREATE USER vector_user IDENTIFIED BY Vector@123456;\n-- \u6388\u4e88\u8fde\u63a5\u3001\u521b\u5efa\u8868\u3001\u7d22\u5f15\u6743\u9650\nGRANT CONNECT, RESOURCE, CREATE TABLE, CREATE INDEX TO vector_user;\n-- \u6388\u4e88\u5411\u91cf\u64cd\u4f5c\u76f8\u5173\u6743\u9650\nGRANT EXECUTE ON SYS.vector_embedding TO vector_user;\nGRANT EXECUTE ON SYS.vector_chunks TO vector_user;<\/code><\/pre>\n<\/li>\n<li>\n<p>\u6b65\u9aa4 2\uff1a\u521b\u5efa\u6570\u636e\u8868\uff0c\u5b58\u50a8\u6587\u6863\u4e0e\u5411\u91cf\u6570\u636e<br \/>\n\u6211\u4eec\u9700\u8981\u4e09\u5f20\u8868\uff1a\u6587\u6863\u57fa\u7840\u4fe1\u606f\u8868\uff08\u5b58\u50a8\u539f\u6587\u6863\u5143\u6570\u636e\uff09\u3001\u6587\u672c\u5757\u8868\uff08\u5b58\u50a8\u62c6\u5206\u540e\u7684\u6587\u672c\u7247\u6bb5\uff09\u3001\u5411\u91cf\u6620\u5c04\u8868\uff08\u5b58\u50a8\u6587\u672c\u5757\u5bf9\u5e94\u7684\u5d4c\u5165\u5411\u91cf\uff09\uff0c\u4e5f\u53ef\u5408\u5e76\u4e3a\u4e00\u5f20\u8868\uff0c\u8fd9\u91cc\u62c6\u5206\u662f\u4e3a\u4e86\u63d0\u5347\u67e5\u8be2\u6548\u7387\u3002<\/p>\n<pre><code class=\"language-sql\">-- 1. \u6587\u6863\u57fa\u7840\u4fe1\u606f\u8868\nCREATE TABLE doc_archives (\ndoc_id NUMBER PRIMARY KEY,\ndoc_name VARCHAR2(200) NOT NULL,\ndoc_type VARCHAR2(50) NOT NULL, -- PDF\/WORD\/MD\nupload_time DATE DEFAULT SYSDATE\n);<\/code><\/pre>\n<pre><code class=\"language-sql\">-- 2. \u6587\u672c\u5757\u8868\nCREATE TABLE doc_chunks (\nchunk_id NUMBER PRIMARY KEY,\ndoc_id NUMBER REFERENCES doc_archives(doc_id),\nchunk_content CLOB NOT NULL, -- \u6587\u672c\u7247\u6bb5\u5185\u5bb9\nchunk_index NUMBER NOT NULL, -- \u6587\u672c\u5757\u5728\u539f\u6587\u6863\u4e2d\u7684\u5e8f\u53f7\n-- 1536\u7ef4\u6587\u672c\u5d4c\u5165\u5411\u91cf\uff08\u9002\u914d\u4e3b\u6d41\u5f00\u6e90\/\u5546\u7528\u6587\u672c\u5d4c\u5165\u6a21\u578b\uff09\nchunk_emb VECTOR(1536) FLOAT32\n);<\/code><\/pre>\n<pre><code class=\"language-sql\">-- \u521b\u5efa\u6587\u6863\u4e0e\u6587\u672c\u5757\u7684\u5173\u8054\u7d22\u5f15\nCREATE INDEX idx_chunks_doc_id ON doc_chunks(doc_id);<\/code><\/pre>\n<\/li>\n<li>\n<p>\u6b65\u9aa4 3\uff1a\u6587\u6863\u9884\u5904\u7406\u4e0e\u5411\u91cf\u751f\u6210\uff08\u6838\u5fc3\uff1a\u6570\u636e\u5e93\u5185\u751f\u6210\u5411\u91cf\uff09<br \/>\n\u4f20\u7edf\u505a\u6cd5\u662f\u5728\u5e94\u7528\u5c42\u62c6\u5206\u6587\u6863\u3001\u8c03\u7528\u5916\u90e8 API \u751f\u6210\u5411\u91cf\uff0c\u518d\u5bfc\u5165\u6570\u636e\u5e93\u3002\u800c Oracle 23ai \u539f\u751f\u5411\u91cf\u5f15\u64ce\u63d0\u4f9b\u4e86 <strong>VECTOR_CHUNKS\uff08\u6587\u672c\u5206\u5757\uff09\u4e0eVECTOR_EMBEDDING\uff08\u5411\u91cf\u751f\u6210\uff09<\/strong> \u4e24\u5927\u51fd\u6570\uff0c\u76f4\u63a5\u5728\u6570\u636e\u5e93\u5185\u5b8c\u6210\u5168\u6d41\u7a0b\uff0c\u65e0\u9700\u5916\u90e8\u4f9d\u8d56\u3002<\/p>\n<h4>3.1 \u6587\u672c\u5206\u5757\uff1a\u7528VECTOR_CHUNKS\u62c6\u5206\u957f\u6587\u672c<\/h4>\n<p>VECTOR_CHUNKS\u51fd\u6570\u53ef\u5c06\u957f\u6587\u672c\u6309\u6307\u5b9a\u957f\u5ea6\u3001\u91cd\u53e0\u5ea6\u62c6\u5206\uff0c\u907f\u514d\u5355\u6587\u672c\u5757\u8bed\u4e49\u4e0d\u5b8c\u6574\u3002<\/p>\n<pre><code class=\"language-sql\">-- \u793a\u4f8b\uff1a\u5c06ID\u4e3a1\u7684PDF\u6587\u6863\u62c6\u5206\u4e3a500\u5b57\/\u5757\uff0c\u91cd\u53e050\u5b57\nDECLARE\nv_doc_content CLOB;\nBEGIN\n-- \u6a21\u62df\u4ece\u539f\u6587\u6863\u83b7\u53d6\u5185\u5bb9\uff08\u5b9e\u9645\u53ef\u4ece\u6587\u4ef6\u5b58\u50a8\u8bfb\u53d6\uff0c\u5b58\u5165CLOB\u5b57\u6bb5\uff09\nv_doc_content := &#039;\u4f01\u4e1a\u6570\u5b57\u5316\u8f6c\u578b\u662f\u6307\u4f01\u4e1a\u5229\u7528\u4e91\u8ba1\u7b97\u3001\u5927\u6570\u636e\u3001\u4eba\u5de5\u667a\u80fd\u7b49\u65b0\u4e00\u4ee3\u4fe1\u606f\u6280\u672f\uff0c\u5bf9\u4e1a\u52a1\u6d41\u7a0b\u3001\u7ec4\u7ec7\u67b6\u6784\u3001\u5546\u4e1a\u6a21\u5f0f\u8fdb\u884c\u5168\u9762\u91cd\u6784\u2026\u2026&#039;; -- \u957f\u6587\u6863\u5185\u5bb9\n\n-- \u8c03\u7528VECTOR_CHUNKS\u62c6\u5206\u6587\u672c\uff0c\u63d2\u5165\u6587\u672c\u5757\u8868\nINSERT INTO doc_chunks (doc_id, chunk_content, chunk_index)\nSELECT \n    1 AS doc_id,\n    chunk_content,\n    chunk_index\nFROM TABLE(VECTOR_CHUNKS(v_doc_content, 500, 50)); -- 500\u5b57\/\u5757\uff0c\u91cd\u53e050\u5b57\nCOMMIT;\nEND;\n\/<\/code><\/pre>\n<h4>3.2 \u5411\u91cf\u751f\u6210\uff1a\u7528VECTOR_EMBEDDING\u751f\u6210\u6587\u672c\u5d4c\u5165\u5411\u91cf<\/h4>\n<p>VECTOR_EMBEDDING\u652f\u6301\u8c03\u7528\u5185\u7f6e AI \u6a21\u578b\u6216 <strong> \u5916\u90e8 AI \u670d\u52a1\uff08\u5982 Ollama\u3001OpenAI API\uff09<\/strong> \u751f\u6210\u5411\u91cf\uff0c\u8fd9\u91cc\u4ee5\u8c03\u7528\u5f00\u6e90\u6587\u672c\u5d4c\u5165\u6a21\u578ball-MiniLM-L6-v2\uff08\u672c\u5730\u90e8\u7f72\uff09\u4e3a\u4f8b\u3002<\/p>\n<pre><code class=\"language-sql\">-- \u4e3a\u5df2\u62c6\u5206\u7684\u6587\u672c\u5757\u751f\u6210\u5d4c\u5165\u5411\u91cf\nDECLARE\nCURSOR c_chunks IS SELECT chunk_id, chunk_content FROM doc_chunks WHERE doc_id = 1;\nBEGIN\nFOR r IN c_chunks LOOP\n    -- \u8c03\u7528VECTOR_EMBEDDING\u751f\u62101536\u7ef4\u5411\u91cf\uff0c\u5b58\u5165chunk_emb\u5217\n    UPDATE doc_chunks\n    SET chunk_emb = VECTOR_EMBEDDING(\n        &#039;all-MiniLM-L6-v2&#039;, -- \u5d4c\u5165\u6a21\u578b\u540d\u79f0\n        r.chunk_content,    -- \u6587\u672c\u5757\u5185\u5bb9\n        VECTOR_OUTPUT =&gt; &#039;FLOAT32&#039; -- \u8f93\u51fa\u7cbe\u5ea6\n    )\n    WHERE chunk_id = r.chunk_id;\nEND LOOP;\nCOMMIT;\nEND;\n\/<\/code><\/pre>\n<h4>\u6b65\u9aa4 4\uff1a\u521b\u5efa HNSW \u7d22\u5f15\uff0c\u63d0\u5347\u68c0\u7d22\u6027\u80fd<\/h4>\n<p>\u6587\u672c\u8bed\u4e49\u68c0\u7d22\u5bf9\u53ec\u56de\u7387\u8981\u6c42\u9ad8\uff0c\u56e0\u6b64\u9009\u62e9 HNSW \u7d22\u5f15\uff1a<\/p>\n<pre><code class=\"language-sql\">-- \u4e3a\u6587\u672c\u5757\u5411\u91cf\u5217\u521b\u5efaHNSW\u7d22\u5f15\uff0c\u4f7f\u7528\u4f59\u5f26\u8ddd\u79bb\uff08\u6587\u672c\u5d4c\u5165\u7684\u6807\u51c6\u76f8\u4f3c\u5ea6\u8ba1\u7b97\u65b9\u5f0f\uff09\nCREATE INDEX idx_chunks_emb_hnsw ON doc_chunks\nUSING VECTOR HNSW (chunk_emb VECTOR_COSINE_DISTANCE)\nWITH (\nDIMENSIONS=1536,\nM=16, -- \u6bcf\u4e2a\u8282\u70b9\u7684\u6700\u5927\u8fb9\u6570\nEF_CONSTRUCTION=200 -- \u7d22\u5f15\u6784\u5efa\u5019\u9009\u96c6\u5927\u5c0f\n);<\/code><\/pre>\n<h4>\u6b65\u9aa4 5\uff1a\u8bed\u4e49\u68c0\u7d22\uff1a\u81ea\u7136\u8bed\u8a00\u8f6c\u5411\u91cf\uff0c\u6267\u884c\u76f8\u4f3c\u67e5\u8be2<\/h4>\n<p>\u8fd9\u662f\u6574\u4e2a\u7cfb\u7edf\u7684\u6838\u5fc3\u73af\u8282\uff1a\u7528\u6237\u8f93\u5165\u81ea\u7136\u8bed\u8a00\u95ee\u9898\uff0c\u5148\u5c06\u95ee\u9898\u751f\u6210\u5411\u91cf\uff0c\u518d\u4e0e\u6570\u636e\u5e93\u4e2d\u7684\u6587\u672c\u5757\u5411\u91cf\u6267\u884c\u76f8\u4f3c\u68c0\u7d22\uff0c\u8fd4\u56de Top-N \u4e2a\u6700\u76f8\u4f3c\u7684\u7ed3\u679c\u3002<\/p>\n<pre><code class=\"language-sql\">-- \u793a\u4f8b\uff1a\u7528\u6237\u63d0\u95ee\u201c\u4f01\u4e1a\u6570\u5b57\u5316\u8f6c\u578b\u7684\u6838\u5fc3\u6b65\u9aa4\u662f\u4ec0\u4e48\uff1f\u201d\nDECLARE\nv_question VARCHAR2(1000) := &#039;<\/code><\/pre>\n<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u4e00\u3001\u573a\u666f\u80cc\u666f\u4e0e\u67b6\u6784\u8bbe\u8ba1 \u573a\u666f\u9700\u6c42\uff1a \u4f01\u4e1a\u5185\u90e8\u5b58\u50a8\u4e86<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[57,58],"tags":[],"class_list":["post-2136","post","type-post","status-publish","format-standard","hentry","category-oracle-23ai","category--oracle-23c"],"_links":{"self":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/2136","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=2136"}],"version-history":[{"count":6,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/2136\/revisions"}],"predecessor-version":[{"id":2142,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/2136\/revisions\/2142"}],"wp:attachment":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2136"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2136"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2136"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}