Sophie Yang wrote:
I am trying to implement a PL/PgSQL function as following: CREATE OR REPLACE FUNCTION sort_by_d_idx (nids INT[][], tbl_name VARCHAR) RETURNS varchar[] AS $$ DECLARE result varchar[]; BEGINEXECUTE 'SELECT ARRAY(SELECT t.idx FROM generate_series(array_lower($1,1), array_upper($1,1)) AS s(i), ' ||tbl_name||' t WHERE $1[s.i][1] = t.rid and $1[s.i][2] = t.rtid ORDER BY length(t.idx))' INTO result; RETURN result; END; $$ LANGUAGE plpgsql; I got an error "ERROR: there is no parameter $1" when I test the function with: select sort_by_d_idx('{{8148, 1}, {8149, 1}, {300, 2}, {8163, 1}, {8170, 1}}'::int[][], 'd_tree_1');The error is understandable, but my question is how to supply the int[][] array into the dynamic SQL?
In 8.4, there will be a EXECUTE '...' USING construct that you could use: http://developer.postgresql.org/pgdocs/postgres/plpgsql-statements.html#PLPGSQL-STATEMENTS-EXECUTING-DYN.
I don't quite understand what the function is trying to do, but in existing releases you could store the input array into a temporary table, or rewrite the function to do its magic in a for loop instead of a single query.
-- Heikki Linnakangas EnterpriseDB http://www.enterprisedb.com -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers
