> PostgreSQL can't currently avoid reading the table, because that's
> where the tuple visibility information is stored. We've been making
> progress toward having some way to avoid reading the table for all
> except very recently written tuples, but we're not there yet (in any
> production version or in the 9.0 version to be released this
> summer).
Thank you for all the replies. I am learning PostgreSQL and figuring out
which of the standard techniques for tuning queries in Oracle works in
PostgreSQL as well. Thank you.
Regards,
Jayadevan
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