Re: Aren't regex_*() functions built-in?

On Sat, 11 Nov 2023 16:53:01 -0800 Adrian Klaver wrote:

>On 11/11/23 16:25, pf(at)pfortin(dot)com wrote:
>Reply to list also
>Ccing list
>> On Sat, 11 Nov 2023 16:16:20 -0800 Adrian Klaver wrote:
>>
>
>>> Probably because it is spelled regexp_replace ().
>>
>> OK, found it in pg_catalog; but "create extension regexp_replace;" won't
>> load it. How do I get regexp_* into public schema?
>
>Not sure why you are trying create extension regexp_replace;.
>
>The functions are already loaded:
>
>\df regexp_replace
> List of functions
> Schema | Name | Result data type | Argument
>data types | Type
>------------+----------------+------------------+------------------------------------------+------
> pg_catalog | regexp_replace | text | text, text, text
> | func
> pg_catalog | regexp_replace | text | text, text, text,
>integer | func
> pg_catalog | regexp_replace | text | text, text, text,
>integer, integer | func
> pg_catalog | regexp_replace | text | text, text, text,
>integer, integer, text | func
> pg_catalog | regexp_replace | text | text, text, text,
>text | func

Running my SQL in public, I get:
An error occurred when executing the SQL command:
select * from a,b where regex_replace(a.address,' ','','g') =
regex_replace(b.address,' ','','g')

ERROR: function regex_replace(text, unknown, unknown, unknown) does not
exist Hint: No function matches the given name and argument types. You
might need to add explicit type casts. Position: 27

Looks like rexexp_* need to be installed in each database I use...

The question is how to use them from public where I get the above
error...?

>Just just them:
>
>select regexp_replace('Thomas', '.[mN]a.', 'M');
> regexp_replace
>----------------
> ThM
>
>
>>
>> Sorry if this a newbie question...
>>
>>>> ncsbe=# \df "replace"
>>>> List of functions
>>>> Schema | Name | Result data type | Argument data types | Type
>>>> ------------+---------+------------------+---------------------+------
>>>> pg_catalog | replace | text | text, text, text | func
>>>> (1 row)
>>>>
>>>> ncsbe=# \df "regex"
>>>> List of functions
>>>> Schema | Name | Result data type | Argument data types | Type
>>>> --------+------+------------------+---------------------+------
>>>> (0 rows)
>>>>
>>>> There are no regex* functions in /usr/share/postgresql/extension
>>>>
>>>> Thanks,
>>>> Pierre
>>>>
>>>>
>>>
>