plpgsql variable substitution problem ...

[Hopefully the correct list this time :)]

Howdy. Creating a function to access different tables depending
on the arguments. However, am having excessive problems.

Current code is as follows:

CREATE FUNCTION access(varchar,varchar) RETURNS INT4 AS '
DECLARE
lcl_field ALIAS FOR $1;
lcl_table ALIAS FOR $2;
lcl_max INT;
BEGIN

SELECT max(lcl_field) INTO lcl_max FROM lcl_table;

RETURN lcl_max;

END;

' LANGUAGE 'plpgsql';

However, if I execute the following code

SELECT getsequence('f1','t1');

I get an error:

psql:sequence.db:35: ERROR: parser: parse error at or near "$2"

(What I really want is to execute a "SELECT max(f1) FROM f2")

The output from the postmaster is:

000528.19:45:45.682 [9553] CommitTransactionCommand
000528.19:45:45.713 [9553] StartTransactionCommand
000528.19:45:45.713 [9553] query: SELECT access('f1','t1'));
000528.19:45:45.717 [9553] ProcessQuery
000528.19:45:45.725 [9553] query: SELECT max( $1 ) FROM $2
000528.19:45:45.726 [9553] ERROR: parser: parse error at or near "$2"
000528.19:45:45.726 [9553] DEBUG: Last error occured while executing PL/pgSQL function getsequence
000528.19:45:45.726 [9553] DEBUG: line 6 at select into variables
000528.19:45:45.726 [9553] AbortCurrentTransaction

Any ideas? I've fiddled with the variables and procedures a few
times but I can't quite get a breakthrough.

tia,

-Greg

------------------------------------------------------------------
www.geelong.com Greg Wickham
P.O. Box 1426 greg(at)geelong(dot)com
Geelong VIC 3220 Ph: (+61 407) 854 566
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