On Thu, Sep 22, 2016 at 6:37 AM, Madusudanan.B.N <b.n.madusuda...@gmail.com>

> > However, this results in an awful slow plan (requiring to scan the
> complete big_table which obviously isn't optimal)
> You mean to say there is a sequential scan ? An explain would be helpful.
> Are there indexes on the provided where clauses.
> Postgres can do a Bitmap heap scan to combine indexes, there is no need to
> fire two separate queries.

It can't combine bitmap scans that come from different tables.

But he can just combine the two queries into one, with a UNION.



Reply via email to