Re: Pass in variable from user???

am 13.05.2006, um 14:15:52 -0700 mailte syohonn(at)gmail(dot)com folgendes:
> Using PL/PGSQL, I am trying to create a procedure to display the count
> of rows in any single table of a database. The End-user would pass in a
> table name and the prodecure would display the table name with the row
> count.
> I am able to hardcode the variable for table and get the appropriate
> results from my count function (see below), but cannot pass in a
> variable and have the function work. Any suggesstions???
>
> CREATE FUNCTION get_table_count(tablename text) RETURNS integer AS $$
> DECLARE
>
> --tablename ALIAS FOR $1;
>
> rowcount INTEGER;
> BEGIN
>
> SELECT INTO rowcount count(*) FROM tablename;

You can't do SL direct with such parameters, but you can use
EXECUTE. Please read:

http://www.postgresql.org/docs/8.1/interactive/plpgsql-statements.html#PLPGSQL-STATEMENTS-EXECUTING-DYN

HTH, Andreas
--
Andreas Kretschmer (Kontakt: siehe Header)
Heynitz: 035242/47215, D1: 0160/7141639
GnuPG-ID 0x3FFF606C http://wwwkeys.de.pgp.net
=== Schollglas Unternehmensgruppe ===