Re:

Oliver Dizon wrote:
> I hope I'm in the right place to throw this. I just want to ask the reason behind this weird scenario.
>
> All records were deleted in a table even if the subquery in the where clause has a missing a column.
>
> --from a certain script where table_id is not yet existing on table_sample
>
> delete from main_table_sample where table_id in (select table_id from table_sample);
>
> Im expecting that postgres will return an ERROR message like
> 'column "table_id" does not exist on table table_sample'
>
> But it did not returned any error and deleted all the records instead.
>
> Version: psql (8.4.9, server 9.2.5)

That seems unlikely.

Can you produce a reproducible test case?

Yours,
Laurenz Albe