Re: TO_DATE function between PostgreSQL 8.2 and 9.4

On Tue, May 17, 2022 at 8:55 AM gzh <gzhcoder(at)126(dot)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.