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Message Posted: Thu, 17 Jun 2004 @ 17:04:06 GMT


     
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Subj:   Performance of Multistatement Query with DELETE/INSERT-SELECT
 
From:   Santra, Partho

Hi

We have a table with more than 350 millioin rows. And we are trying to execute this query

     DELETE
       FROM  EDW_DATA.JOURNAL_DETAILS_1
     WHERE pp_line_id IN
                 (SELECT pp_line_id
                     FROM EDW_DATA.JOURNAL_DETAILS_2
                  WHERE WAREHOUSE_UPDATE_TIMESTAMP > timestamp '2004-06-15
     18:30:13')
     ;INSERT into EDW_DATA.JOURNAL_DETAILS_1
     SELECT *
       FROM  EDW_DATA.JOURNAL_DETAILS_2
     WHERE WAREHOUSE_UPDATE_TIMESTAMP > timestamp '2004-06-15 18:30:13';

The inner subquery takes about 55 mins to return the PP_LINE_ID's. We have Primary Index on pp_line_id. If we create a NUSI on WAREHOUSE_UPDATE_TIMESTAMP and SELECT WAREHOUSE_UPDATE_TIMESTAMP then the query returns with few secs, but I need PP_LINE_ID's instead.


Can you guyz help me.

TIA



     
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