Found a solution:

-- my_constraint(0) = turn off constraint
-- my_constraint(1) = turn ON constraint
CREATE OR REPLACE FUNCTION my_constraint(INTEGER)
RETURNS VARCHAR
  AS '
        DECLARE
                cmd VARCHAR;
        BEGIN
                IF $1 = 0
                THEN
                        RAISE NOTICE ''Turning OFF constraints'';
                        cmd := ''ALTER TABLE $tName DROP CONSTRAINT "$1"'';
                        EXECUTE cmd;
                        cmd := ''ALTER TABLE $tName DROP CONSTRAINT "$2"'';
                        EXECUTE cmd;
                ELSE
                        RAISE NOTICE ''Turning ON constraints'';
                        ALTER TABLE $tName
                                ADD FOREIGN KEY(key1) REFERENCES table1;
                        ALTER TABLE $tName
                                ADD FOREIGN KEY(key2) REFERENCES table2;
                END IF;
                RETURN ''OK'';
        END;'
        LANGUAGE plpgsql;"




[EMAIL PROTECTED] (robert) wrote in message news:<[EMAIL PROTECTED]>...
> I'm running Postgres 7.3.2 in Redhat 9.0.
> 
> I'm trying to execute a function below defined as a stored procedure
> 
>    ALTER TABLE tms_schedule DROP CONSTRAINT "$1";
> 
> However, postgres thinks the "$1" is a parameter value.  How do I tell
> postgres to treat it as a literal $1?
> 
> TIA,
> Robert

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