{"id":638,"date":"2007-04-17T07:59:00","date_gmt":"2007-04-17T13:59:00","guid":{"rendered":"http:\/\/www.cls-solutions.com\/blog\/?p=638"},"modified":"2007-04-17T07:59:00","modified_gmt":"2007-04-17T13:59:00","slug":"oracle-9i-clob-resolved","status":"publish","type":"post","link":"http:\/\/www.cls-solutions.com\/blog\/oracle-9i-clob-resolved\/","title":{"rendered":"Oracle 9i Clob Resolved"},"content":{"rendered":"<p>Working with CLOBs has been very difficult. The task was to extract all unique messages that were in LDR2 and not in LDR into a UNIQUE table. <br \/>Set commands such as,MINUS, INTERSECT, =, etc, won&#8217;t work with CLOBs datatypes. But using dbms_lob.getlength, dbms_lob.Compare, and dbms_Utility.Get_hash_value. This sql OUTER-JOIN finally worked:<\/p>\n<p>insert into seebeyond.RAD_MESSAGES_UNIQUE (SELECT seebeyond.RAD_MESSAGES_LDR2.MESSAGES, seebeyond.RAD_MESSAGES_LDR2.ID FROM seebeyond.RAD_MESSAGES_LDR2 LEFT OUTER JOIN seebeyond.RAD_MESSAGES_LDR ON (seebeyond.RAD_MESSAGES_LDR2.HASH = seebeyond.RAD_MESSAGES_LDR.HASH) AND (seebeyond.RAD_MESSAGES_LDR2.MSGLEN = seebeyond.RAD_MESSAGES_LDR.MSGLEN) AND (dbms_lob.Compare(seebeyond.RAD_MESSAGES_LDR2.MESSAGES,seebeyond.RAD_MESSAGES_LDR.MESSAGES)=0) WHERE seebeyond.RAD_MESSAGES_LDR.ID IS NULL)<\/p>\n<p>SQL> select count(*) from RAD_MESSAGES_LDR2;<\/p>\n<p>  COUNT(*)<br \/>&#8212;&#8212;&#8212;-<br \/>    744923<\/p>\n<p>SQL> select count(*) from RAD_MESSAGES_LDR;<\/p>\n<p>  COUNT(*)<br \/>&#8212;&#8212;&#8212;-<br \/>    713316<\/p>\n<p>SQL> select count(*) from RAD_MESSAGES_UNIQUE;<\/p>\n<p>  COUNT(*)<br \/>&#8212;&#8212;&#8212;-<br \/>     31624 <\/p>\n","protected":false},"excerpt":{"rendered":"<p>Working with CLOBs has been very difficult. The task was to extract all unique messages that were in LDR2 and not in LDR into a UNIQUE table. Set commands such as,MINUS, INTERSECT, =, etc, won&#8217;t work with CLOBs datatypes. But using dbms_lob.getlength, dbms_lob.Compare, and dbms_Utility.Get_hash_value. This sql OUTER-JOIN finally worked: insert into seebeyond.RAD_MESSAGES_UNIQUE (SELECT seebeyond.RAD_MESSAGES_LDR2.MESSAGES, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-638","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/www.cls-solutions.com\/blog\/wp-json\/wp\/v2\/posts\/638","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/www.cls-solutions.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.cls-solutions.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.cls-solutions.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.cls-solutions.com\/blog\/wp-json\/wp\/v2\/comments?post=638"}],"version-history":[{"count":0,"href":"http:\/\/www.cls-solutions.com\/blog\/wp-json\/wp\/v2\/posts\/638\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.cls-solutions.com\/blog\/wp-json\/wp\/v2\/media?parent=638"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.cls-solutions.com\/blog\/wp-json\/wp\/v2\/categories?post=638"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.cls-solutions.com\/blog\/wp-json\/wp\/v2\/tags?post=638"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}