On Wed, Jul 17, 2013 at 12:50 PM, Ellen Rothman
<erothman(at)datalinedata(dot)com>wrote:
> I have the same table definition in two different databases on the same
> computer. When I explain a simple query in both of them, one database uses
> a sequence scan and the other uses an index scan. If I try to run the Seq
> Scan version without the where clause restricting the value of uniqueid, it
> uses all of the memory on my computer and never completes. ****
>
> ** **
>
> How can I get the Seq Scan version to use an index scan?
>
Did you run "ANALYZE your-table-name" before trying the sequential scan
query?