Question

I have a query

select * from myTable

…and I want to wrap this query inside a stored procedure, and have the store procedure output the results of this query.

How do I do it?

In ms-sql, i can store my query as a string to a string variable. And then do “Execute (variable)”. Why no such thing in Oracle?

Answer 1

Use:

CREATE OR REPLACE PROCEDURE MY_SPROC() RETURN SYS_REFCURSOR

L_CURSOR SYS_REFCURSOR;

BEGIN

  OPEN L_CURSOR FOR 
    SELECT * from MYTABLE;

  RETURN L_CURSOR;

END;

Use this if you want to run dynamic SQL on Oracle:

CREATE OR REPLACE PROCEDURE MY_SPROC() RETURN SYS_REFCURSOR

L_CURSOR SYS_REFCURSOR;
L_QUERY  VARCHAR2(5000) DEFAULT 'SELECT ...';

BEGIN

  OPEN L_CURSOR FOR L_QUERY;
  RETURN L_CURSOR;

END;

If you want to include bind variables in the dynamic SQL:

CREATE OR REPLACE PROCEDURE MY_SPROC() RETURN SYS_REFCURSOR

L_CURSOR SYS_REFCURSOR;
L_QUERY  VARCHAR2(5000) DEFAULT 'SELECT ...';

BEGIN

  OPEN L_CURSOR FOR L_QUERY
   USING bind_var1;
  RETURN L_CURSOR;

END;