pg@fastcrypt.com (Dave Cramer) wrote:
> It appears that the optimizer only uses indexes for = clause?
It can use indices only if there is a given prefix.
Thus:
where text_field like 'A%'
can use the index, essentially transforming this into the clauses
where text_field >= 'A' and
text_field < 'B'.
You can't get much out of an index for
where text_field like '%SOMETHING'
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