"Linux Guru" <[EMAIL PROTECTED]> writes:
> We have a large datawarehouse stored in postgres and temp tables are created
> based on user query. The process of temp table creation involves selecting
> data from main fact table, this includes several select and update
> statements and one of the following update statement is having performance
> issues.

Try ANALYZEing the temp table before the step that's too slow.

If that doesn't help, let's see EXPLAIN ANALYZE (not just EXPLAIN)
output.

                        regards, tom lane

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