Inserting and updating long lob colum college dating internet iowa kansas missouri student
This book includes scripts and tools to hypercharge Oracle 11g performance and you can buy it for 30% off directly from the publisher.I was looking for a query which picks data from a table having Blob column and update a table having LONG RAW column.SUBSTR(SOFTWARE_FILE, 4000) SOFTWARE_FILE, SOFTWARE_TYPE from APPDBA. QA_SOFTWARE_DUMMY_TEST ; PL/SQL will only read/write the first 32k of a LONG RAW and SQL will convert the column as a RAW so will only deal with the first 2000 bytes.You can use java to access LONG RAW columns directly from the DB, as demonstrated in the question "Get the LENGTH of a LONG RAW".What is the fastest way to do a large batch insert of XML into an unstructured CLOB table column?Answer: When dealing with large objects, where are relatively few tuning options other than using a large enough blocksize to ensure that the XMLTYPE column does not fragment onto multiple data blocks.A DELETE statement on the other hand is executed serially as indicated in the note section of the plan.
Until 12c, running parallel DML on tables with LOB columns required that table to be partitioned.
Question: I have a table with a CLOB column (XMLTYPE datatype) and I want to know the best way to do an insert into this large object column.
So the SQL insert basically inserts a record with new XML, and a SQL updated replaces the old XML.
Here's a little example, first the setup: DECLARE 2 l_lob BLOB; 3 BEGIN 4 INSERT INTO t VALUES (1, 'FF', '') RETURNING SOURCE INTO l_lob; 5 FOR i IN 1..10 LOOP 6 dbms_lob.writeappend(l_lob, 4000, 7 utl_raw.overlay('FF', 'FF', 1, 4000, 'FF')); 8 END LOOP; 9 END; 10 / PL/SQL procedure successfully completed Despite the fact that you make a reversal (normaly you should move from LONG to LOB, LONG being obsolete)...
You must use dbms_lob package, and make some plsql: Eventualy you can use read, getlength...