- Preface, Notes, Licenses
- 1 General Information
- 2 Installing and Upgrading MySQL
- 3 Tutorial
- 4 MySQL Programs
- 5 MySQL Server Administration
- 6 Backup and Recovery
- 7 Optimization
- 8 Language Structure
- 9 Internationalization and Localization
- 10 Data Types
- 11 Functions and Operators
- 12 SQL Statement Syntax
- 13 Storage Engines
- 14 High Availability and Scalability
- 15 MySQL Enterprise Monitor
- 16 Replication
- 17 MySQL Cluster
- 18 Stored Programs and Views
- 19 INFORMATION_SCHEMA Tables
- 20 Connectors and APIs
- 21 Extending MySQL
- A MySQL 5.0 Frequently Asked Questions
- B Errors, Error Codes, and Common Problems
- C MySQL Change History
- D Restrictions and Limits
- Index
- Standard Index
- C Function Index
- Command Index
- Function Index
- INFORMATION_SCHEMA Index
- Transaction Isolation Level Index
- JOIN Types Index
- Operator Index
- Option Index
- Privileges Index
- SQL Modes Index
- Status Variable Index
- Statement/Syntax Index
- System Variable Index
Table of Contents [+/-]
This chapter discusses stored programs and views, which are database objects defined in terms of SQL code that is stored on the server for later invocation.
Stored programs include these objects:
Stored routines, that is, stored procedures and functions. A stored function is used much like a built-in function. you invoke it in an expression and it returns a value during expression evaluation. A stored procedure is invoked using the
CALLstatement. 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.Triggers. A trigger is a named database object that is associated with a table and that is activated when a particular event occurs for the table, such as an insert or update.
Views are stored queries that when invoked produce a result set. A view acts as a virtual table.
This chapter describes how to use each type of stored program and views. Additional information about SQL syntax for statements related to these objects is available in the following locations:
For each object type, there are
CREATE,ALTER, andDROPstatements that control which objects exist and how they are defined. See Section 12.1, “Data Definition Statements”.The
CALLstatement is used to invoke stored procedures. See Section 12.2.1, “CALLSyntax”.Stored program definitions contain a body that may use compound statements, loops, conditionals, and declared variables. See Section 12.7, “MySQL Compound-Statement Syntax”.
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