Re: RLS makes COPY TO process child tables

Yugo NAGATA <nagata(at)sraoss(dot)co(dot)jp> writes:
> Antonin Houska <ah(at)cybertec(dot)at> wrote:
>> While working on [1] I noticed that if RLS gets enabled, the COPY TO command
>> includes the contents of child table into the result, although the
>> documentation says it should not:

> I think this is a bug because the current behaviour is different from
> the documentation.

I agree, it shouldn't do that.

> When RLS is enabled on a table in `COPY ... TO ...`, the query is converted
> to `COPY (SELECT * FROM ...) TO ...` to allow the rewriter to add in RLS
> clauses. This causes to dump the rows of child tables.

Do we actually say that in so many words, either in the code or docs?
If so, it ought to read `COPY (SELECT * FROM ONLY ...) TO ...`
instead. (If we say that in the docs, then arguably the code *does*
conform to the docs. But I don't see it in the COPY ref page at least.)

regards, tom lane