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Table access order

 
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danm
Intermediate


Joined: 29 Jun 2004
Posts: 170
Topics: 73
PostPosted: Thu Aug 06, 2009 2:00 pm    Post subject: Table access order Reply with quote
An explain from inner joining 3 tables show:
Code:

QBLOCKNO       PLANNO          TNAME
-------------  ---------      --------
1                1               TABLE1
1                2               TABLE2
1                3               TABLE3


Can I influence DB2 to access the table in different order? e.g.
Code:

QBLOCKNO       PLANNO          TNAME
-------------  ---------      --------
1                1               TABLE2
1                2               TABLE3
1                3               TABLE1
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kolusu
Site Admin
Site Admin


Joined: 26 Nov 2002
Posts: 12378
Topics: 75
Location: San Jose
PostPosted: Thu Aug 06, 2009 2:33 pm    Post subject: Reply with quote
danm,

You can try the suggestions listed here

http://www.ibm.com/developerworks/data/library/techarticle/0301mullins/0301mullins.html#section3

Kolusu
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