Question

Insert query help

Asked by: mjimison1956

this update statement is taking forever.  The explain plan is attached.

INSERT INTO LEDGERENTRY_TEMP( LEDGERENTRY_ID,CONN_ID) SELECT LEDGERENTRY.LEDGERENTRY_ID, :"SYS_B_0" FROM LEDGERENTRY,BUSEVENTHIST,BUSEVENTDEF,REALEVENTHIST,REALEVENTDEF,REALEVENTTYPE WHERE (LEDGERENTRY.BUSEVENTHIST_ID=BUSEVENTHIST.BUSEVENTHIST_ID AND LEDGERENTRY.REALEVENTHIST_ID=REALEVENTHIST.REALEVENTHIST_ID AND BUSEVENTHIST.BUSEVENTDEF_ID=BUSEVENTDEF.BUSEVENTDEF_ID AND REALEVENTDEF.REALEVENTDEF_ID=REALEVENTHIST.REALEVENTDEF_ID AND REALEVENTDEF.REALEVENTTYPE_ID=REALEVENTTYPE.REALEVENTTYPE_ID) AND (REALEVENTTYPE.REALEVENTTYPE_ID = :"SYS_B_1" OR REALEVENTTYPE.REALEVENTTYPE_ID = :"SYS_B_2" AND REALEVENTHIST.PROCESSING_TYPE_ID != :"SYS_B_3" AND LEDGERENTRY.ISLEDGERENTRYADJUSTED = :1 AND REALEVENTHIST.REALEVENT_DTM > :2 AND LEDGERENTRY.LOT_ID= :3 AND REALEVENTHIST.REALEVENT_DTM <= :4)


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Asked On
2008-08-06 at 09:56:37ID23626397
Topic

PL / SQL

Participating Experts
1
Points
500
Comments
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Answers

 

by: DrSQLPosted on 2008-08-06 at 10:31:10ID: 22172695

Check this section of the WHERE:

(REALEVENTTYPE.REALEVENTTYPE_ID = :"SYS_B_1" OR REALEVENTTYPE.REALEVENTTYPE_ID = :"SYS_B_2"

You have an OR in the middle of a bunch of "AND" conditions.  Try putting parens around the OR condition so that you can be certain of what it is doing.  Is an OR necessary, or can you write it with an in:

REALEVENTTYPE.REALEVENTTYPE_ID in (:"SYS_B_1", :"SYS_B_2" )

I'm not sure what syntax you are using (I don't recognize the :"), though posted in the Oracle/plSQL section.

Good luck!

 

by: mjimison1956Posted on 2008-08-06 at 11:36:27ID: 22173450

This code is being generated from a java application.

 

by: DrSQLPosted on 2008-08-06 at 11:48:35ID: 22173580

I don't know if you have up-to-date statistics, but the last two lines in the explain plan gives a clue as to possible ways to improve this.  The LEDGERENTRY table has two references in the where clause to specific values:

LEDGERENTRY.ISLEDGERENTRYADJUSTED = :1
LEDGERENTRY.LOT_ID= :3

I assume the first one is a Y/N value, but if the lot_id is fairly distinct then an index on that allow the query to use an index on LEDGERENTRY.

Does BUSEVENTHIST.BUSEVENTHIST_ID have an index?  that would speed things up.

Finally, what role do the other tables (BUSEVENTHIST,BUSEVENTDEF,REALEVENTHIST,REALEVENTDEF,REALEVENTTYPE ) play in the query since they don't contribute to the where clause.  Often it is more efficient to use EXISTS instead of a complex join.  Or, join some of the tables in subqueries and join the result to just one or two tables (that whole REALEVENT... relationship could probably be joined together first and then just join the result to the LEDGEREVENT or BUSEVENT).

Good luck!

 

by: mjimison1956Posted on 2008-08-06 at 12:35:19ID: 22174154

Dr. SQL,

where would the paran go on the OR clause per your statement above.  Am dba not developer.

 

by: mjimison1956Posted on 2008-08-06 at 12:36:32ID: 22174171

Is this correct?

INSERT INTO LEDGERENTRY_TEMP( LEDGERENTRY_ID,CONN_ID) SELECT LEDGERENTRY.LEDGERENTRY_ID, :"SYS_B_0" FROM LEDGERENTRY,BUSEVENTHIST,BUSEVENTDEF,REALEVENTHIST,REALEVENTDEF,REALEVENTTYPE WHERE (LEDGERENTRY.BUSEVENTHIST_ID=BUSEVENTHIST.BUSEVENTHIST_ID AND LEDGERENTRY.REALEVENTHIST_ID=REALEVENTHIST.REALEVENTHIST_ID AND BUSEVENTHIST.BUSEVENTDEF_ID=BUSEVENTDEF.BUSEVENTDEF_ID AND REALEVENTDEF.REALEVENTDEF_ID=REALEVENTHIST.REALEVENTDEF_ID AND REALEVENTDEF.REALEVENTTYPE_ID=REALEVENTTYPE.REALEVENTTYPE_ID) AND ((REALEVENTTYPE.REALEVENTTYPE_ID = :"SYS_B_1" OR REALEVENTTYPE.REALEVENTTYPE_ID = :"SYS_B_2") AND REALEVENTHIST.PROCESSING_TYPE_ID != :"SYS_B_3" AND LEDGERENTRY.ISLEDGERENTRYADJUSTED = :1 AND REALEVENTHIST.REALEVENT_DTM > :2 AND LEDGERENTRY.LOT_ID= :3 AND REALEVENTHIST.REALEVENT_DTM <= :4)

 

by: DrSQLPosted on 2008-08-06 at 12:37:53ID: 22174184

That looks right to me.  And the indexes?

 

by: mjimison1956Posted on 2008-08-06 at 12:38:39ID: 22174191

Indexes were there.... just optimizer not picking them up.  Can not hint code.  Ran fresh stats..still not picking them up.  Running all_rows not cost.

 

by: DrSQLPosted on 2008-08-06 at 12:43:14ID: 22174249

Actually, it's FIRST_ROWS or ALL_ROWS and RULE, CHOOSE, or COST but I think I knowwhat you mean.  The OR could still throw it off.  Let me see if I can do some of what I suggested.  Give me a couple of minutes and we'll see if we can convince it to use what's there.

P.S.  You did run stats on the tables AND the indexes, right?

 

by: mjimison1956Posted on 2008-08-06 at 12:45:04ID: 22174275

yes ran stats

 

by: DrSQLPosted on 2008-08-06 at 13:03:04ID: 22174475

I think this is equivalent:

INSERT INTO LEDGERENTRY_TEMP( LEDGERENTRY_ID,CONN_ID) 
SELECT LEDGERENTRY.LEDGERENTRY_ID, :"SYS_B_0" 
  FROM LEDGERENTRY,
       (select REALEVENTHIST.REALEVENTHIST_ID
          from REALEVENTHIST,REALEVENTTYPE,REALEVENTDEF
         WHERE REALEVENTTYPE.REALEVENTTYPE_ID in (:"SYS_B_1",:"SYS_B_2")
           AND REALEVENTHIST.PROCESSING_TYPE_ID != :"SYS_B_3"
           AND REALEVENTHIST.REALEVENT_DTM > :2
           AND REALEVENTDEF.REALEVENTDEF_ID=REALEVENTHIST.REALEVENTDEF_ID
           AND REALEVENTDEF.REALEVENTTYPE_ID=REALEVENTTYPE.REALEVENTTYPE_ID
           AND REALEVENTHIST.REALEVENT_DTM <= :4) REALEVENTHIST
 WHERE LEDGERENTRY.REALEVENTHIST_ID=REALEVENTHIST.REALEVENTHIST_ID
   AND LEDGERENTRY.ISLEDGERENTRYADJUSTED = :1
   AND LEDGERENTRY.LOT_ID= :3
                                              
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