Re: OID Usage

Alvaro Herrera wrote:

>You can create a function to get the sequence name attached to a table.
>Of course, you should take into account the fact that there could be
>more than one (two serial fields in a table are rare but not
>impossible), but if your tables have only one sequence you should be OK.
>
>
Are there a way to find and test if it is a primary key ?

>Something with
>
>select relname, relkind
>from pg_depend join pg_class on (oid = objid)
>where pg_depend.refobjid = 'foo'::regclass
> and relkind = 'S';
>
>
Hmm, need to play more around using the "pg_" system tables.

Are they all well documentet, or need I some guessing ?

>(only lightly tested). Then you can use that to construct your argument
>to the nextval() function.
>
>
:-)

>This doesn't happen with sequences on Postgres. The value you get is
>guaranteed to be the one the sequence generated for you.
>
>
I know, and this is one of the reasons for not using MySQL :-)

/BL