{"id":2147,"date":"2025-07-30T21:48:00","date_gmt":"2025-07-30T13:48:00","guid":{"rendered":"http:\/\/www.821121.com\/?p=2147"},"modified":"2026-04-23T22:50:30","modified_gmt":"2026-04-23T14:50:30","slug":"23ai-%e6%96%b0%e7%89%b9%e6%80%a7%e4%b9%8b%e6%90%ad%e5%bb%ba%e4%bc%81%e4%b8%9a%e7%9f%a5%e8%af%86%e5%ba%93rag%e7%b3%bb%e7%bb%9f","status":"publish","type":"post","link":"http:\/\/www.821121.com\/?p=2147","title":{"rendered":"23ai \u65b0\u7279\u6027\u4e4b\u642d\u5efa\u4f01\u4e1a\u77e5\u8bc6\u5e93RAG\u7cfb\u7edf"},"content":{"rendered":"

\u6b65\u9aa41\uff1a\u73af\u5883\u51c6\u5907\u4e0e\u6743\u9650\u914d\u7f6e<\/h4>\n

\u786e\u4fddOracle 23ai\u6570\u636e\u5e93\u5df2\u542f\u7528\u539f\u751f\u5411\u91cf\u5f15\u64ce\uff08\u9ed8\u8ba4\u5f00\u542f\uff09\uff0c```sql
\n\u521b\u5efa\u4e13\u7528\u7528\u6237\u5e76\u6388\u4e88\u76f8\u5173\u6743\u9650\uff1a
\n-- \u521b\u5efaRAG\u4e13\u7528\u7528\u6237
\nCREATE USER rag_user IDENTIFIED BY RAG@123456;
\n-- \u6388\u4e88\u5fc5\u8981\u6743\u9650
\nGRANT CONNECT, RESOURCE, CREATE TABLE, CREATE INDEX TO rag_user;
\n-- \u6388\u4e88\u5411\u91cf\u64cd\u4f5c\u3001\u5206\u5757\u3001\u5d4c\u5165\u76f8\u5173\u6743\u9650
\nGRANT EXECUTE ON SYS.VECTOR_EMBEDDING TO rag_user;
\nGRANT EXECUTE ON SYS.VECTOR_CHUNKS TO rag_user;
\n-- \u6388\u4e88\u6a21\u578b\u52a0\u8f7d\u6743\u9650\uff08\u5982\u9700\u5bfc\u5165\u81ea\u5b9a\u4e49ONNX\u6a21\u578b\uff09
\nGRANT EXECUTE ON SYS.DBMS_VECTOR TO rag_user;<\/p>\n

#### \u6b65\u9aa42\uff1a\u521b\u5efa\u6570\u636e\u8868\uff0c\u5b58\u50a8\u6587\u6863\u4e0e\u5411\u91cf\u6570\u636e\n\u521b\u5efa\u4e09\u5f20\u6838\u5fc3\u8868\uff0c\u5206\u522b\u5b58\u50a8\u6587\u6863\u5143\u6570\u636e\u3001\u5206\u5757\u540e\u7684\u6587\u672c\u3001\u5411\u91cf\u6570\u636e\uff08\u53ef\u5408\u5e76\u4e3a\u4e00\u5f20\u8868\uff0c\u62c6\u5206\u66f4\u4fbf\u4e8e\u7ef4\u62a4\uff09\uff1a\n```sql\n-- 1. \u6587\u6863\u5143\u6570\u636e\u8868\uff08\u5b58\u50a8\u539f\u6587\u6863\u4fe1\u606f\uff09\nCREATE TABLE doc_archives (\n    doc_id NUMBER PRIMARY KEY,\n    doc_name VARCHAR2(200) NOT NULL, -- \u6587\u6863\u540d\u79f0\n    doc_type VARCHAR2(50) NOT NULL, -- \u6587\u6863\u7c7b\u578b\uff08\u5236\u5ea6\/\u4ea7\u54c1\/\u57f9\u8bad\uff09\n    doc_content CLOB NOT NULL, -- \u6587\u6863\u5b8c\u6574\u5185\u5bb9\n    upload_time DATE DEFAULT SYSDATE\n);\n\n-- 2. \u6587\u672c\u5757\u8868\uff08\u5b58\u50a8\u5206\u5757\u540e\u7684\u6587\u672c\u4e0e\u5411\u91cf\uff09\nCREATE TABLE doc_chunks (\n    chunk_id NUMBER PRIMARY KEY,\n    doc_id NUMBER REFERENCES doc_archives(doc_id), -- \u5173\u8054\u6587\u6863ID\n    chunk_content CLOB NOT NULL, -- \u5206\u5757\u6587\u672c\u5185\u5bb9\n    chunk_index NUMBER NOT NULL, -- \u5206\u5757\u5e8f\u53f7\n    chunk_offset NUMBER NOT NULL, -- \u5206\u5757\u5728\u539f\u6587\u6863\u4e2d\u7684\u504f\u79fb\u91cf\n    chunk_emb VECTOR(1536) FLOAT32 -- 1536\u7ef4\u6587\u672c\u5d4c\u5165\u5411\u91cf\n);\n\n-- \u521b\u5efa\u5173\u8054\u7d22\u5f15\uff0c\u63d0\u5347\u67e5\u8be2\u6548\u7387\nCREATE INDEX idx_chunks_doc_id ON doc_chunks(doc_id);\n-- \u521b\u5efaHNSW\u5411\u91cf\u7d22\u5f15\uff0c\u4f18\u5316\u76f8\u4f3c\u68c0\u7d22\u6027\u80fd\nCREATE INDEX idx_chunks_emb_hnsw ON doc_chunks\nUSING VECTOR HNSW (chunk_emb VECTOR_COSINE_DISTANCE)\nWITH (DIMENSIONS=1536, M=16, EF_CONSTRUCTION=200);<\/code><\/pre>\n
\u6b65\u9aa43\uff1a\u6587\u6863\u5206\u5757\u4e0e\u5411\u91cf\u751f\u6210\uff08\u5168\u6d41\u7a0b\u6570\u636e\u5e93\u5185\u5b8c\u6210\uff09<\/h4>\n
\u63d2\u5165\u4e00\u7bc7\u4f01\u4e1a\u6570\u5b57\u5316\u8f6c\u578b\u5236\u5ea6\u6587\u6863\uff0c\u8c03\u7528VECTOR_CHUNKS\u5206\u5757\uff0c\u518d\u8c03\u7528VECTOR_EMBEDDING\u751f\u6210\u5411\u91cf\uff1a<\/p>\n
-- 1. \u63d2\u5165\u539f\u6587\u6863\nINSERT INTO doc_archives (doc_id, doc_name, doc_type, doc_content)\nVALUES (\n    1,\n    '\u4f01\u4e1a\u6570\u5b57\u5316\u8f6c\u578b\u5b9e\u65bd\u5236\u5ea6',\n    '\u5236\u5ea6\u6587\u6863',\n    '\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\uff0c\u6838\u5fc3\u6b65\u9aa4\u5305\u62ec\uff1a1. \u6218\u7565\u89c4\u5212\uff0c\u660e\u786e\u8f6c\u578b\u76ee\u6807\u4e0e\u8def\u5f84\uff1b2. \u6570\u636e\u6cbb\u7406\uff0c\u68b3\u7406\u4f01\u4e1a\u6570\u636e\u8d44\u4ea7\uff0c\u5efa\u7acb\u6570\u636e\u6807\u51c6\uff1b3. \u6280\u672f\u9009\u578b\uff0c\u642d\u5efa\u6570\u5b57\u5316\u6280\u672f\u5e95\u5ea7\uff1b4. \u4e1a\u52a1\u843d\u5730\uff0c\u63a8\u52a8\u5404\u4e1a\u52a1\u7ebf\u6570\u5b57\u5316\u6539\u9020\uff1b5. \u4eba\u624d\u57f9\u517b\uff0c\u63d0\u5347\u5458\u5de5\u6570\u5b57\u5316\u80fd\u529b\uff1b6. \u6301\u7eed\u4f18\u5316\uff0c\u6839\u636e\u4e1a\u52a1\u53cd\u9988\u8fed\u4ee3\u8f6c\u578b\u65b9\u6848\u3002'\n);\nCOMMIT;\n\n-- 2. \u6587\u6863\u5206\u5757\u5e76\u63d2\u5165\u6587\u672c\u5757\u8868\nINSERT INTO doc_chunks (chunk_id, doc_id, chunk_content, chunk_index, chunk_offset)\nSELECT \n    ROWNUM,\n    1 AS doc_id,\n    chunk_text AS chunk_content,\n    ROWNUM AS chunk_index,\n    chunk_offset\nFROM TABLE(VECTOR_CHUNKS(\n    (SELECT doc_content FROM doc_archives WHERE doc_id = 1),\n    100, -- \u5206\u5757\u957f\u5ea6\uff08100\u5b57\/\u5757\uff09\n    10,  -- \u91cd\u53e0\u5ea6\uff0810\u5b57\uff09\n    'by chars'\n));\nCOMMIT;\n\n-- 3. \u4e3a\u6587\u672c\u5757\u751f\u6210\u5411\u91cf\nUPDATE doc_chunks\nSET chunk_emb = VECTOR_EMBEDDING(\n    'all-MiniLM-L6-v2',\n    chunk_content,\n    VECTOR_OUTPUT => 'FLOAT32',\n    DIMENSIONS => 1536\n)\nWHERE doc_id = 1;\nCOMMIT;<\/code><\/pre>\n
\u6b65\u9aa44\uff1a\u6267\u884cRAG\u68c0\u7d22\uff0c\u751f\u6210\u667a\u80fd\u56de\u7b54<\/h4>\n
\u7528\u6237\u63d0\u95ee\u201c\u4f01\u4e1a\u6570\u5b57\u5316\u8f6c\u578b\u7684\u6838\u5fc3\u6b65\u9aa4\u6709\u54ea\u4e9b\u201d\uff0c\u751f\u6210\u5411\u91cf\u540e\u68c0\u7d22\u76f8\u4f3c\u6587\u672c\uff0c\u518d\u8c03\u7528LLM\u751f\u6210\u56de\u7b54\uff08\u4ee5\u8c03\u7528\u672c\u5730Ollama\u4e3a\u4f8b\uff09\uff1a<\/p>\n
DECLARE\n    v_query VARCHAR2(1000) := '\u4f01\u4e1a\u6570\u5b57\u5316\u8f6c\u578b\u7684\u6838\u5fc3\u6b65\u9aa4\u6709\u54ea\u4e9b';\n    v_query_emb VECTOR(1536) FLOAT32;\n    v_context CLOB; -- \u68c0\u7d22\u5230\u7684\u76f8\u4f3c\u6587\u672c\u4e0a\u4e0b\u6587\n    v_answer VARCHAR2(4000); -- LLM\u751f\u6210\u7684\u56de\u7b54\nBEGIN\n    -- 1. \u751f\u6210\u7528\u6237\u63d0\u95ee\u7684\u5411\u91cf\n    v_query_emb := VECTOR_EMBEDDING('all-MiniLM-L6-v2', v_query, VECTOR_OUTPUT => 'FLOAT32', DIMENSIONS => 1536);\n\n    -- 2. \u68c0\u7d22Top3\u76f8\u4f3c\u6587\u672c\u5757\uff0c\u62fc\u63a5\u4e3a\u4e0a\u4e0b\u6587\n    SELECT LISTAGG(chunk_content, ' ') WITHIN GROUP (ORDER BY similarity DESC)\n    INTO v_context\n    FROM (\n        SELECT \n            chunk_content,\n            VECTOR_SIMILARITY(chunk_emb, v_query_emb, 'COSINE') AS similarity\n        FROM doc_chunks\n        WHERE doc_id = 1\n        ORDER BY chunk_emb <-> v_query_emb\n        FETCH FIRST 3 ROWS ONLY\n    );\n\n    -- 3. \u8c03\u7528\u672c\u5730Ollama\u7684LLaMA 3\u6a21\u578b\uff0c\u751f\u6210\u56de\u7b54\n    v_answer := DBMS_CLOUD.INVOKE_FUNCTION(\n        function_name => 'OLLAMA_LLM',\n        params => JSON_OBJECT(\n            'prompt' VALUE '\u57fa\u4e8e\u4ee5\u4e0b\u4e0a\u4e0b\u6587\uff0c\u56de\u7b54\u7528\u6237\u95ee\u9898\uff1a' || v_context || ' \u7528\u6237\u95ee\u9898\uff1a' || v_query,\n            'model' VALUE 'llama3',\n            'temperature' VALUE 0.2\n        )\n    );\n\n    -- 4. \u8f93\u51fa\u7ed3\u679c\n    DBMS_OUTPUT.PUT_LINE('\u7528\u6237\u63d0\u95ee\uff1a' || v_query);\n    DBMS_OUTPUT.PUT_LINE('LLM\u56de\u7b54\uff1a' || v_answer);\nEND;\n\/<\/code><\/pre>\n
\u6267\u884c\u540e\uff0cLLM\u4f1a\u57fa\u4e8e\u68c0\u7d22\u5230\u7684\u5236\u5ea6\u6587\u672c\uff0c\u751f\u6210\u7cbe\u51c6\u7684\u56de\u7b54\uff0c\u4e14\u6240\u6709\u6570\u636e\u5747\u5728Oracle\u6570\u636e\u5e93\u5185\u6d41\u8f6c\uff0c\u65e0\u9700\u5916\u90e8\u4f20\u8f93\uff0c\u5b89\u5168\u4e14\u9ad8\u6548\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u6b65\u9aa41\uff1a\u73af\u5883\u51c6\u5907\u4e0e\u6743\u9650\u914d\u7f6e \u786e\u4fddOracle 23<\/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-2147","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\/2147","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=2147"}],"version-history":[{"count":1,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/2147\/revisions"}],"predecessor-version":[{"id":2148,"href":"http:\/\/www.821121.com\/index.php?rest_route=\/wp\/v2\/posts\/2147\/revisions\/2148"}],"wp:attachment":[{"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=2147"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=2147"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.821121.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=2147"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}