Hi Justin,
Sorry unable to send a query plan from a closed network. Here the stats are updated on the Oracle table.
It seems like when joining the local tables it is not filtering data on Oracle and bringing data to postgres. It is filtering when we actually pass the values.
Regards,
Aditya.
On Mon, Jul 11, 2022 at 5:43 PM Justin Pryzby <pryzby@xxxxxxxxxxxxx> wrote:
On Mon, Jul 11, 2022 at 05:38:34PM +0530, aditya desai wrote:
> Hi,
> I have one Oracle fdw table which is giving performance issue when joined
> local temp table gives performance issue.
>
> select * from oracle_fdw_table where transaction_id in ( select
> transaction_id from temp_table) ---- 54 seconds. Seeing HASH SEMI JOIN in
> EXPLAIN PLAN. temp_table has only 74 records.
You'd have to share the plan
https://wiki.postgresql.org/wiki/Slow_Query_Questions
Do the tables have updated stats ?
