Re: Finding free time period on non-continous tstzrange field values

Amitabh Kant <amitabhkant@gmail.com> writes:
> I tried the following query :

> SELECT tstzmultirange(tstzrange('2022-11-25 00:00:00', '2022-11-30
> 00:00:00', '[]')) -
>   range_agg(time_range) AS availability
> FROM test_time_range
> WHERE time_range && tstzrange('2022-11-25 00:00:00', '2022-11-30 00:00:00',
> '[]');

> but then I receive the following error. My guess is I need to cast the
> tstzrange output, but can't seem to find the correct cast.

> ERROR: function tstzmultirange(tstzrange) does not exist
> LINE 1: SELECT tstzmultirange(tstzrange('2022-11-25 00:00:00', '2022... ^
> HINT: No function matches the given name and argument types. You might need
> to add explicit type casts. SQL state: 42883 Character: 8

That function certainly should exist:

psql (14.6)
Type "help" for help.

postgres=# \df tstzmultirange
                              List of functions
   Schema   |      Name      | Result data type | Argument data types  | Type 
------------+----------------+------------------+----------------------+------
 pg_catalog | tstzmultirange | tstzmultirange   |                      | func
 pg_catalog | tstzmultirange | tstzmultirange   | VARIADIC tstzrange[] | func
 pg_catalog | tstzmultirange | tstzmultirange   | tstzrange            | func
(3 rows)

My guess is that your server is not in fact PG14, but some
older version.

            regards, tom lane