{"id":94584,"date":"2024-10-19T19:28:23","date_gmt":"2024-10-19T11:28:23","guid":{"rendered":"https:\/\/server.hk\/cnblog\/94584\/"},"modified":"2024-10-19T19:28:23","modified_gmt":"2024-10-19T11:28:23","slug":"oracle-%e8%b6%85%e9%95%b7%e5%ad%97%e7%ac%a6%e4%b8%b2%e5%95%8f%e9%a1%8c%e7%9a%84%e8%a7%a3%e6%b1%ba%e8%be%a6%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/94584\/","title":{"rendered":"ORACLE \u8d85\u9577\u5b57\u7b26\u4e32\u554f\u984c\u7684\u89e3\u6c7a\u8fa6\u6cd5"},"content":{"rendered":"

ORACLE \u8d85\u9577\u5b57\u7b26\u4e32\u554f\u984c\u7684\u89e3\u6c7a\u8fa6\u6cd5<\/h1>\n

\u5728\u4f7f\u7528 Oracle \u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u7d93\u5e38\u6703\u9047\u5230\u8d85\u9577\u5b57\u7b26\u4e32\u7684\u554f\u984c\u3002\u9019\u4e9b\u5b57\u7b26\u4e32\u53ef\u80fd\u4f86\u81ea\u7528\u6236\u8f38\u5165\u3001\u6587\u4ef6\u5c0e\u5165\u6216\u5176\u4ed6\u6578\u64da\u6e90\u3002\u7576\u5b57\u7b26\u4e32\u8d85\u904e Oracle \u7684\u9650\u5236\u6642\uff0c\u5c07\u6703\u5c0e\u81f4\u932f\u8aa4\uff0c\u5f71\u97ff\u61c9\u7528\u7a0b\u5e8f\u7684\u6b63\u5e38\u904b\u884c\u3002\u672c\u6587\u5c07\u63a2\u8a0e Oracle \u8d85\u9577\u5b57\u7b26\u4e32\u7684\u554f\u984c\u53ca\u5176\u89e3\u6c7a\u8fa6\u6cd5\u3002<\/p>\n

Oracle \u5b57\u7b26\u4e32\u9577\u5ea6\u9650\u5236<\/h2>\n

\u5728 Oracle \u6578\u64da\u5eab\u4e2d\uff0cVARCHAR2 \u985e\u578b\u7684\u5b57\u7b26\u4e32\u9577\u5ea6\u9650\u5236\u70ba 4000 \u5b57\u7b26\uff08\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528 CLOB \u985e\u578b\u53ef\u4ee5\u5b58\u5132\u66f4\u9577\u7684\u5b57\u7b26\u4e32\uff09\u3002\u9019\u610f\u5473\u8457\u5982\u679c\u5617\u8a66\u63d2\u5165\u6216\u66f4\u65b0\u8d85\u904e\u6b64\u9650\u5236\u7684\u5b57\u7b26\u4e32\uff0c\u5c07\u6703\u5f15\u767c\u932f\u8aa4\u3002\u4f8b\u5982\uff1a<\/p>\n

INSERT INTO my_table (my_column) VALUES ('\u9019\u662f\u4e00\u500b\u8d85\u904e 4000 \u5b57\u7b26\u7684\u5b57\u7b26\u4e32...');<\/code><\/pre>\n
\u5982\u679c\u5b57\u7b26\u4e32\u9577\u5ea6\u8d85\u904e 4000 \u5b57\u7b26\uff0c\u5247\u6703\u51fa\u73fe\u985e\u4f3c\u4ee5\u4e0b\u7684\u932f\u8aa4\u4fe1\u606f\uff1a<\/p>\n
ORA-12899: \u503c\u592a\u5927\uff0c\u7121\u6cd5\u63d2\u5165\u5230 my_column (\u5be6\u969b: 5000, \u6700\u5927: 4000)<\/code><\/pre>\n
\u89e3\u6c7a\u65b9\u6848<\/h2>\n
1. \u4f7f\u7528 CLOB \u985e\u578b<\/h3>\n
\u5982\u679c\u9700\u8981\u5b58\u5132\u8d85\u904e 4000 \u5b57\u7b26\u7684\u5b57\u7b26\u4e32\uff0c\u6700\u76f4\u63a5\u7684\u89e3\u6c7a\u65b9\u6848\u662f\u4f7f\u7528 CLOB\uff08Character Large Object\uff09\u985e\u578b\u3002CLOB \u53ef\u4ee5\u5b58\u5132\u6700\u591a 4GB \u7684\u5b57\u7b26\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u5982\u4f55\u5275\u5efa\u4e00\u500b\u5305\u542b CLOB \u985e\u578b\u7684\u8868\uff1a<\/p>\n
CREATE TABLE my_table (\n    id NUMBER PRIMARY KEY,\n    my_column CLOB\n);<\/code><\/pre>\n
\u63d2\u5165 CLOB \u6578\u64da\u7684\u793a\u4f8b\uff1a<\/p>\n
INSERT INTO my_table (id, my_column) VALUES (1, '\u9019\u662f\u4e00\u500b\u8d85\u904e 4000 \u5b57\u7b26\u7684\u5b57\u7b26\u4e32...');<\/code><\/pre>\n
2. \u4f7f\u7528\u5206\u6bb5\u63d2\u5165<\/h3>\n
\u5982\u679c\u4e0d\u60f3\u4f7f\u7528 CLOB \u985e\u578b\uff0c\u53e6\u4e00\u7a2e\u65b9\u6cd5\u662f\u5c07\u9577\u5b57\u7b26\u4e32\u5206\u6bb5\u63d2\u5165\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5c07\u5b57\u7b26\u4e32\u5206\u5272\u6210\u591a\u500b\u90e8\u5206\u4f86\u5be6\u73fe\uff0c\u7136\u5f8c\u5c07\u9019\u4e9b\u90e8\u5206\u5b58\u5132\u5728\u591a\u500b\u884c\u4e2d\u3002\u4f8b\u5982\uff1a<\/p>\n
DECLARE\n    long_string VARCHAR2(32767);\n    part VARCHAR2(4000);\n    i INTEGER := 1;\nBEGIN\n    long_string := '\u9019\u662f\u4e00\u500b\u8d85\u904e 4000 \u5b57\u7b26\u7684\u5b57\u7b26\u4e32...'; -- \u5047\u8a2d\u9019\u662f\u9577\u5b57\u7b26\u4e32\n    WHILE LENGTH(long_string) > 0 LOOP\n        part := SUBSTR(long_string, 1, 4000);\n        INSERT INTO my_table (id, my_column) VALUES (i, part);\n        long_string := SUBSTR(long_string, 4001);\n        i := i + 1;\n    END LOOP;\nEND;<\/code><\/pre>\n
3. \u4f7f\u7528 PL\/SQL \u51fd\u6578<\/h3>\n
\u53ef\u4ee5\u7de8\u5beb PL\/SQL \u51fd\u6578\u4f86\u8655\u7406\u8d85\u9577\u5b57\u7b26\u4e32\u7684\u63d2\u5165\u3002\u9019\u6a23\u53ef\u4ee5\u5c07\u5b57\u7b26\u4e32\u5206\u6bb5\u4e26\u81ea\u52d5\u63d2\u5165\u5230\u6578\u64da\u5eab\u4e2d\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\u51fd\u6578\uff1a<\/p>\n
CREATE OR REPLACE PROCEDURE insert_long_string(p_string IN VARCHAR2) IS\n    part VARCHAR2(4000);\n    i INTEGER := 1;\nBEGIN\n    WHILE LENGTH(p_string) > 0 LOOP\n        part := SUBSTR(p_string, 1, 4000);\n        INSERT INTO my_table (id, my_column) VALUES (i, part);\n        p_string := SUBSTR(p_string, 4001);\n        i := i + 1;\n    END LOOP;\nEND;<\/code><\/pre>\n
\u7e3d\u7d50<\/h2>\n
\u5728 Oracle \u6578\u64da\u5eab\u4e2d\u8655\u7406\u8d85\u9577\u5b57\u7b26\u4e32\u554f\u984c\u6642\uff0c\u53ef\u4ee5\u9078\u64c7\u4f7f\u7528 CLOB \u985e\u578b\u3001\u5206\u6bb5\u63d2\u5165\u6216\u7de8\u5beb PL\/SQL \u51fd\u6578\u7b49\u65b9\u6cd5\u3002\u9019\u4e9b\u89e3\u6c7a\u65b9\u6848\u80fd\u5920\u6709\u6548\u5730\u5e6b\u52a9\u958b\u767c\u8005\u514b\u670d\u5b57\u7b26\u4e32\u9577\u5ea6\u9650\u5236\u7684\u6311\u6230\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u61c9\u7528\u7a0b\u5e8f\u7684\u7a69\u5b9a\u6027\u3002<\/p>\n
\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc \u9999\u6e2f VPS<\/a> \u548c\u5176\u4ed6\u670d\u52d9\u7684\u4fe1\u606f\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u89e3\u6c7aORACLE\u8d85\u9577\u5b57\u7b26\u4e32\u554f\u984c\u7684\u6709\u6548\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\uff0c\u78ba\u4fdd\u7cfb\u7d71\u7a69\u5b9a\u904b\u884c\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-94584","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94584","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=94584"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94584\/revisions"}],"predecessor-version":[{"id":94585,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/94584\/revisions\/94585"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=94584"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=94584"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=94584"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}