Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> I found parse_coerce.c::TypeCategory(), which contains information about
> which data type oids are in which grouping, e.g. DATETIME, STRING,
> NUMERIC, etc. It seems that function, if called with
> pg_type.typbasetype could help determine if quotes should be used.
TypeCategory is a crock that should have been done away with long ago.
We need to be working to eliminate it, not expand our dependency on it.
regards, tom lane