ight in its cost.
With kind regards,
Mark
On Thu, 15 Aug 2019 at 21:22, Ibrar Ahmed wrote:
>
>
> On Fri, Aug 16, 2019 at 12:16 AM <066ce...@free.fr> wrote:
>
>> Generally speaking, when executing UNION ; a DISTINCT is run afterward on
>> the resultset.
>>
>&g
Dear all,
I was wondering if someone could help me understands what a union all
actually does.
For my thesis I am using Apache Calcite to rewrite queries into using
materialized views which I then give to a Postgres database.
For some queries, this means that they will be rewritten in a UNION ALL
