Table of Contents

27.1 Defining Stored Programs

27.2 Using Stored Routines

27.2.1 Stored Routine Syntax

27.2.2 Stored Routines and MySQL Privileges

27.2.3 Stored Routine Metadata

27.2.4 Stored Procedures, Functions, Triggers, and LAST_INSERT_ID()

27.3 Using Triggers

27.3.1 Trigger Syntax and Examples

27.3.2 Trigger Metadata

27.4 Using the Event Scheduler

27.4.1 Event Scheduler Overview

27.4.2 Event Scheduler Configuration

27.4.3 Event Syntax

27.4.4 Event Metadata

27.4.5 Event Scheduler Status

27.4.6 The Event Scheduler and MySQL Privileges

27.5 Using Views

27.5.1 View Syntax

27.5.2 View Processing Algorithms

27.5.3 Updatable and Insertable Views

27.5.4 The View WITH CHECK OPTION Clause

27.5.5 View Metadata

27.6 Stored Object Access Control

27.7 Stored Program Binary Logging

27.8 Restrictions on Stored Programs

27.9 Restrictions on Views

• Stored procedure: An object created withCREATE PROCEDURE and invoked using theCALL statement. A procedure does not have a return value but can modify its parameters for later inspection by the caller. It can also generate result sets to be returned to the client program.

• Stored function: An object created withCREATE FUNCTION and used much like a built-in function. You invoke it in an expression and it returns a value during expression evaluation.

• Trigger: An object created withCREATE TRIGGER that is associated with a table. A trigger is activated when a particular event occurs for the table, such as an insert or update.

• Event: An object created withCREATE EVENT and invoked by the server according to schedule.

• View: An object created withCREATE VIEW that when referenced produces a result set. A view acts as a virtual table.

• Stored routines include stored procedures and functions.

• Stored programs include stored routines, triggers, and events.

• Stored objects include stored programs and views.

• For each object type, there areCREATE,ALTER, andDROP statements that control which objects exist and how they are defined. SeeSection 15.1, “Data Definition Statements”.

• TheCALL statement is used to invoke stored procedures. SeeSection 15.2.1, “CALL Statement”.

• Stored program definitions include a body that may use compound statements, loops, conditionals, and declared variables. SeeSection 15.6, “Compound Statement Syntax”.

• Metadata changes to objects referred to by stored programs are detected and cause automatic reparsing of the affected statements when the program is next executed. For more information, seeSection 10.10.3, “Caching of Prepared Statements and Stored Programs”.