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Stored Procedure

3. Disclaimer: This presentation is prepared by trainees of
baabtra as a part of mentoring program. This is not official
document of baabtra –Mentoring Partner
Baabtra-Mentoring Partner is the mentoring division of baabte System Technologies Pvt . Ltd

4. Stored Procedure
• An SP is a program code (like in a regular
computing language) stored in the database
server
• A stored procedure is a method to encapsulate
repetitive tasks
• Procedures are compiled and stored . So at run
time no need of compilation required which
makes pretty much faster
• stored procedures can reduce long SQL queries
to a single line

5. Creating a Stored Procedure
• DELIMITER //
CREATE PROCEDURE csp_procedure_name(<paramList>)
BEGIN
<procedure Body>;
END //
DELIMITER ;
–Keyword to create a procedure
Procedure Name as given by user

6. Creating a Stored Procedure
• DELIMITER //
CREATE PROCEDURE csp_procedure_name(<paramList>)
BEGIN
<procedure Body>;
END //
DELIMITER ;
A parameter in the paramList is specified as:
<mode> <param_name> <type>
Mode:
IN  input parameter (default)
OUT  output parameter
INOUT  input and output parameter
• DELIMITER is character or string
user to tell MYSQL client that it
as an end of SQL statement
• By default ,the DELIMITER is
;(semi colon)

7. Calling a stored procedure
• Syntax:
– CALL stored_procedure_name (param1, param2, ....);

8. Deleting a stored procedure
• Syntax:
– DROP PROCEDURE procedureName;

9. Example
• DELIMITER //
• create procedure csp_insert_tbl_user_login(IN username varchar(200),IN
password varchar(100))
• begin
• DECLARE fk_int_id int;
• insert into tabl_user(vchar_username,vchar_password) values
(username,password);
• Set fk_int_id=last_insert_id();
• insert into tabl_login(fk_int_user_id) values(fk_int_id);
• end //
• DELIMITER ;
• Call csp_insert_user_login(”rahees”,”rahees123”);

11. Cursor
• When we execute a statement, a relation is returned. It is
stored in private work area for the statement. Cursor is a
pointer to this area.
• A cursor lets you fetch one or more rows from a SQL result set
into stored program variables
• A cursor allows to iterate a set of rows returned by a query and
process each row accordingly.
• SELECT INTO is fine for single-row queries, but many
applications require the querying of multiple rows of data. You
will use a cursor in MySQL to accomplish this.

12. Declare Handler
• The DECLARE _____ HANDLER statement specifies a handler that deals with one
or more conditions.
• If one of these conditions occurs, the specified statement executes.
• DECLARE handler_action HANDLER FOR condition_value [, condition_value] ...
Statement
• handler_action:
• CONTINUE | EXIT | UNDO
• condition_value: mysql_error_code
– SQLWARNING | NOT FOUND | SQLEXCEPTION

13. Advantage
• Reuse the application logic
• do not need to write the code again and again
• code is stored in a pre-compiled form , does not need to
be compiled at run-time
• Reduced network traffic
• instead of sending multiple lengthy SQL statements, the
application has to send only name and parameters of
the stored procedure
• Call it whenever needed

14. ANY DOUBTS??

15. THANK YOU

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