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Pattern Matching using LIKE predicate on a DB2 column using INDEX

I have a column in db2 with an index. When I search using LIKE
sometimes it gives results very slow (about 3 to 5 mins). But after
the initial hit,
subsequent searches using different expressions return very fast (2

It is almost as-if DB2 decides to cache the whole index when we run
query first time.

After couple of hours later (or next day) again the initial query
takes the hit.

Any ideas ?

Nov 7 '07 #1
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