From: | Michael Ansley <Michael(dot)Ansley(at)intec-telecom-systems(dot)com> |
---|---|
To: | "'David Richter'" <D(dot)Richter(at)DKFZ-heidelberg(dot)de> |
Cc: | "'Kovacs Zoltan'" <kovacsz(at)pc10(dot)radnoti-szeged(dot)sulinet(dot)hu>, "'Josh Berkus'" <josh(at)agliodbs(dot)com>, sqllist <pgsql-sql(at)postgresql(dot)org> |
Subject: | RE: PL/PGSQL function with parameters |
Date: | 2001-02-06 13:16:06 |
Message-ID: | 7F124BC48D56D411812500D0B747251480F3D4@FILESERVER002 |
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Thread: | |
Lists: | pgsql-hackers pgsql-sql |
Just for the record:
DROP FUNCTION table_count(varchar);
CREATE FUNCTION table_count(varchar) RETURNS integer AS '
DECLARE
SQL varchar;
RES integer;
BEGIN
SQL = ''SELECT * INTO temp1 FROM '' || $1;
EXECUTE SQL;
SELECT count(*) INTO RES FROM temp1;
RETURN(RES)
END;
'
LANGUAGE 'plpgsql';
...
dev=> select table_count('switch');
test
------
6
(1 row)
This function produces exactly what you would hope for, a count of rows in
the specified table. It's particularly inefficient at doing it, because it
does a table copy (and doesn't bother to clean up after itself ;-(), so
don't do this on a large table ;-) but it shows the principle.
What I couldn't get it to do was to select directly into the variable RES.
Perhaps someone could enlighten me.
Cheers...
MikeA
-----Original Message-----
From: David Richter [mailto:D(dot)Richter(at)DKFZ-heidelberg(dot)de]
Sent: 06 February 2001 09:39
To: Michael Ansley
Subject: Re: [SQL] PL/PGSQL function with parameters
Hello!
Thanks a lot for Your answer!
But with my version 7.0.2. this suggestion doesn't work:
It appears: parser: parse error at or near "exec" or
parser: parse error at or near "execute"
And how should i design the update command in the suggested way e.g.?
EXEC ''UPDATE '' ||$1
''SET '' || $2 '' = psr_rec.parentoid
WHERE chilioid = psr_rec.childoid;''
Wich exact release I will need to use this feature?
Wich one are You using?
Greetings
David
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