On Tue, May 17, 2022 at 8:55 AM gzh <gzhco...@126.com> wrote: > --PostgreSQL 9.4 > > --------------- > > SELECT to_date(now() + '-7day', 'YYYY-MM-DD'); > > > > -------------------------------------------------------------------------------- > > ERROR: function to_date(timestamp with time zone, unknown) does not exist > > LINE 1: SELECT to_date(now() + '-7day', 'YYYY-MM-DD') > > ^ > > ********** Error ********** > > > Is there any easy way to maintain compatibility? > > > You could try creating a user function named "to_date" with (timestamptz, text) as the signature and then inside the function cast the first argument to text explicitly before invoking the built-in to_date(text, text) function and returning its result.
You may have to deal with namespace/search_path issues though... David J.
