Oracle error ORA-22905: cannot access rows from a non-nested table item

Question

here\'s the stored procedure i wrote.In this proc \"p_subjectid\" is an array of numbers passed from the front end.

PROCEDURE getsubjects(p_subjectid subject         


        

Answer 1

Oracle has two execution scopes: SQL and PL/SQL. When you use a SELECT/INSERT/UPDATE (etc) statement you are working in the SQL scope and, in Oracle 11g and below, you cannot reference types that are defined in the PL/SQL scope. (Note: Oracle 12 changed this so you can reference PL/SQL types.)

TYPE subjectid_tab IS TABLE OF NUMBER INDEX BY BINARY_INTEGER;

Is an associative array and can only be defined in the PL/SQL scope so cannot be used in SQL statements.

What you want is to define a collection (not an associative array) in the SQL scope using:

CREATE TYPE subjectid_tab IS TABLE OF NUMBER;

(Note: you do not need the INDEX BY clause for a collection.)

Then you can do:

OPEN p_subjects FOR
  SELECT *
  FROM   empsubject
  WHERE  subject_id MEMBER OF p_subjectid;

or

OPEN p_subjects FOR
  SELECT *
  FROM   empsubject
  WHERE  subject_id IN ( SELECT COLUMN_VALUE FROM TABLE( p_subjectid ) );