Russell Keane <russell.ke...@inps.co.uk> writes:
> Running the following query takes 56+ ms as it does a seq scan of the whole
> table:
> SELECT CODE FROM stuff
> WHERE SEARCH_KEY LIKE 'AAAAAA%'
Why don't you create an index on search_key, and forget all these other
machinations? (If your locale isn't C you'll need to use a
varchar_pattern_ops index.)
regards, tom lane
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