Error: Unable to find an overload for operator || with given argument type(s): (text,oid)

[MrLolthe1st]

SELECT NULL AS PROCEDURE_CAT, n.nspname AS PROCEDURE_SCHEM, p.proname AS PROCEDURE_NAME, NULL, NULL, NULL, d.description AS REMARKS, 2 AS PROCEDURE_TYPE, p.proname || '_' || p.oid AS SPECIFIC_NAME FROM pg_catalog.pg_namespace n, pg_catalog.pg_proc p LEFT JOIN pg_catalog.pg_description d ON (p.oid=d.objoid) LEFT JOIN pg_catalog.pg_class c ON (d.classoid=c.oid AND c.relname='pg_proc') LEFT JOIN pg_catalog.pg_namespace pn ON (c.relnamespace=pn.oid AND pn.nspname='pg_catalog') WHERE p.pronamespace=n.oid AND p.prokind='p' AND p.proname LIKE E'%' ORDER BY PROCEDURE_SCHEM, PROCEDURE_NAME, p.oid::text