From: | Andreas <maps(dot)on(at)gmx(dot)net> |
---|---|
To: | pgsql-sql(at)postgresql(dot)org |
Subject: | problem with selecting from a function |
Date: | 2011-06-21 01:55:50 |
Message-ID: | 4DFFFA26.6010003@gmx.net |
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Thread: | |
Lists: | pgsql-sql |
Hi,
I've got a table with a couple of objects.
Primary key object_id.
There is a function that fetches some values from another table that
relate to an object_id.
Like fctX ( 7 ) --> set of typX ... ( 14, 'bla' ), ( 17, 'blu' ), (
21, 'ble' ), ...
The result of the function can have 0 or more lines of a defined
result-type typX.
Those resulting numbers are not object_ids.
Now I'd need a SELECT that lists all function results of all object_ids.
Like:
...
6, ...
7, 14, 'bla'
7, 17, 'blu'
7, 21, 'ble'
8, ...
Actually it was enough to get just the numerical column of the function
result.
I tried
select object_id, fctX (object_id) from objects;
Then I get:
7, (14, 'bla')
7, (17, 'blu')
7, (21, 'ble') <--- round brackets
This looks like an array but how can I split it up to columns or at
least extract the number-column?
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