Table name as parameter in function

[Alexander Pucher]

Hi,

struggling around with this for some time:

How can I use a table name as a parameter in a PL/pgSQL function ??

I tried this but it didn't work...
CREATE OR REPLACE FUNCTION my_row_count(text) RETURNS int4 AS '
DECLARE
num_rows int4;
BEGIN
num_rows := (select count(*) from $1);
RETURN num_rows;
END;
' LANGUAGE plpgsql;

Thnaks for any input!

regards,
alex.

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[Timothy Perrigo]

You'll need to use the EXECUTE command to build the SQL dynamically.

See:
http://www.postgresql.org/docs/7.4/interactive/plpgsql-
statements.html#PLPGSQL-STATEMENTS-EXECUTING-DYN

On Nov 23, 2004, at 2:56 PM, Alexander Pucher wrote:

Hi,

struggling around with this for some time:

How can I use a table name as a parameter in a PL/pgSQL function ??

I tried this but it didn't work...
CREATE OR REPLACE FUNCTION my_row_count(text) RETURNS int4 AS '
DECLARE
num_rows int4;
BEGIN
num_rows := (select count(*) from $1);
RETURN num_rows;
END;
' LANGUAGE plpgsql;

Thnaks for any input!

regards,
alex.

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