Re: Function description - Mailing list pgsql-sql

>>> Richard Huxton <dev@archonet.com> 2008-02-15 11:15 >>>
>Dont' forget to cc: the list Bart :-)

 

My mistake, sorry. Normally I only reply to the list and not to the respondent's personal address.

Would that be wrong too?

>
>Bart Degryse wrote:
>> Thanks for that explanation Richard.
>> But how can I know what they repeat without having documentation.
>> I mean, how about functions like eg regexeqjoinsel, regexeqsel, reltimeeq, reltimege.
>> I can imagine they mimic some other functionality, but how can I know whichone?
>
>Well, like I said many implement operators, so they can be obviously be
>found in pg_operator:
>
>SELECT * FROM pg_operator WHERE oprcode = 'reltimeeq'::regproc;

Ok, now I see. Basically, something like this was what I was looking for.

 

>
>The oprleft/right/result columns hold oid numbers for types in pg_type.
>
>Casts are listed in pg_cast etc.
>
>The fine manuals detail the system catalogues in a chapter "System
>Catalogs".
>http://www.postgresql.org/docs/8.3/static/catalogs.html

I will take a close look at these.

 

>
>To see how e.g. \dC etc work start psql with -E
>

I'm sorry, but I don't have commandline access to the database. That would

require an amount of trust and a level of competence our ICT department is incapable of.

 

>If it's not documented though, you need to ask two questions:
>1. Why am I using it?

 

Well, at this moment I'm not using any of these functions as I didn't know what

they do. You have to admit though that it would by useless to implement some

functionality myself that already exists, but that I just didn't know about because

I couldn't find it in the manual.

Now I know there's only "aliases" to be found, no "undocument treasures".

>2. Will it be there in the next version?
>
>--
>   Richard Huxton
>   Archonet Ltd