Re: Since '2001-09-09 01:46:40'::timestamp microseconds are lost when extracting epoch

I wrote:
> We could make use of COMPARE_COERCIONFORM_FIELD 100% correct by removing
> these two tests of the funcformat value, but on the whole I doubt that
> would be better.

On still closer inspection, that seems like it'd be fine.  All of
the gram.y productions that emit COERCE_SQL_SYNTAX also produce
schema-qualified function names (via SystemFuncName); and it seems
hard to see a use-case where we'd not do that.  This makes the two
checks I cited 100% redundant, because the conditions they are in
also insist on an unqualified function name.  So let's just take them
out again, making it strictly OK to use COMPARE_COERCIONFORM_FIELD.

            regards, tom lane