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venkatm99
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Joined: 01 Jun 2006
Posts: 23
Location: Sinagpore
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hi
A table is having 3 index.
index-1 - unique (primary key)
index-2
index-3
Iam expecting my program to select index-2 but it is selecting index-1.
Hw index is priortised??????
cheers
venkat |
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MFRASHEED
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Joined: 14 Jun 2005
Posts: 186
Location: USA
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Can you put SQL statement your program is using.
Normally DB2 uses most optimized way to get data, normally!!
Also make sure in SQL statement columns in index-2 are first.
You can also use SQLEASE untility to find how Db2 is going to filter based on indexes and what indexes it may use. |
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MFRASHEED
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Joined: 14 Jun 2005
Posts: 186
Location: USA
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| Quote: |
Also make sure in SQL statement columns in index-2 are first.
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meant to be:
Also make sure in SQL statement columns in index-2 are first in WHERE clause. |
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