Re: ts_rewrite in 10.4

Douglas Doole <dougdoole@gmail.com> writes:
> The release notes say:
> ALTER FUNCTION pg_catalog.ts_rewrite(tsquery, tsquery, tsquery) PARALLEL
> UNSAFE;

> But when I pull pg_proc.h from 10.4, I find:
> DATA(insert OID = 3684 (  ts_rewrite PGNSP PGUID 12 1 0 0 0 f f f f t f i s
> 3 0 3615 "3615 3615 3615" ...

> Which I think means the function is still marked parallel safe. Am I
> missing something?

Oh ... that's a mistake in the release notes :-(.  The 3-argument form of
ts_rewrite doesn't execute any user-supplied query; AFAICS it's not any
less safe than anything else.  The 2-argument form runs a user-supplied
query string, and *does* need to be marked unsafe.  So the patch got
it right, but then we got confused while making the notes.

            regards, tom lane