How to use bind variables in this procedure

Question

Hi Experts,
How to use bind variables in this procedure for static queries.
PROCEDURE DELETE_MER_PROC (M_id IN NUMBER)
IS
BEGIN
V_date DATE;
SELECT PD_DATE INTO v_date FROM PD_MAINTAIN;
    DELETE FROM MER_CLEAR
    WHERE MER_DT < v_date
    AND ID = M_ID;
COMMIT;
END;   
How to use  v_date and m_id as bind variables in this procedure to avoid hard parsing.
Please help me.
Thanks.

Answer 1

976208 wrote:
How to use  v_date and m_id as bind variables in this procedure to avoid hard parsing.
You cannot avoid hard parsing - as the 1st time a SQL statement (like the SELECT or DELETE statements in your code) is encountered, it does not reside in the server's Shared Pool, and needs to be added into the pool via a hard parse.
Bind variables does not prevent hard parsing. Hard parsing happens when the SQL statement (with or without bind variables) is a brand new statement encountered by the server.
Bind variables enables the same SQL cursor to be reused, by simply changing the bind variable value.
Not using bind variables means that each SQL statement is unique and not shareable - as the value is hardcoded into the statement and cannot be changed via a bind value. This typically means LOTS of different SQL statements (where the only difference is the changed value in the statement) are created - with each statement being a new statement not seen before in the Shared Pool and needing to be hard parsed.
One does not design one's code not to be hard parsed. There ALWAYS will be a hard parse in order to get a SQL statement into the Shared Pool. One designs one's code to REUSE cursors in the Shared Pool.