On Feb 14, 2010, at 5:17 PM, bill house wrote:
> CREATE OR REPLACE FUNCTION disp_dup_recs(varchar, varchar)
> RETURNS SETOF test_table
> AS $$ SELECT *
> FROM $1
> WHERE $2
> IN (SELECT $2
> GROUP BY $2
> HAVING ( COUNT($2) > 1 )
> );
> $$
> LANGUAGE SQL
> STABLE;
>
> --returns
> --ERROR: syntax error at or near "$1"
> --LINE 81: FROM $1
You can't build SQL statements like this. If you want to build a statement dynamically (where the table name and column
referencesare not known when the function is defined) you need to use EXECUTE. See
http://www.postgresql.org/docs/8.4/interactive/plpgsql-statements.html#PLPGSQL-STATEMENTS-EXECUTING-DYN
John DeSoi, Ph.D.
