> I have a query that when run on similar tables in 2 different databases
> either uses the index on the column (primary key) in the where clause or
> does a full table scan. The structure of the tables is the same, except
> that the table where the index does not get used has an extra million
> rows (22mil vs 23mil).

Are both using the same version of PostgreSQL?   If so, what version?


Josh Berkus
Aglio Database Solutions
San Francisco

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