1/2/2024 0 Comments Mysql stored procedureThis statement is a MySQL extension to the SQL :2003 specification. Returns the text of a previously defined stored procedure that was created using the CREATE PROCEDURE statement. Removes one or more stored functions from MySQL’s proc table. Removes one or more stored procedures from MySQL’s proc table. It does not affect related stored procedures or stored functions. It does not affect related stored procedures or stored functions.Īlters a previously defined stored function that was created using the CREATE FUNCTION statement. My general impression of stored procedure support is that it is proceeding slowly in order to avoid any missteps that often plague large software development projects.Ĭreates a stored procedure, which is stored in the proc table in the MySQL database.Ĭreates a user-defined function, essentially a stored procedure that returns data.Īlters a previously defined stored procedure that was created using the CREATE PROCEDURE statement. In addition, the MySQL stored procedure documentation indicates that there may be future compatibility for Oracle’s PL/SQL and SQL Server’s T-SQL. Theoretically this means that, if the database structure is the same, stored procedures written for one will run on the other.Įven though the paint isn’t quite dry on MySQL’s support of stored procedures, there’s enough to get many tasks done, as Table A shows. Unlike either of the shrink-wrapped Oracle or Microsoft relational databases, which do not follow the current SQL:2003 syntax for stored procedures, MySQL and IBM’s DB2 do conform to the syntax. It’s a good bet that this feature is pretty high up on the “to do” list for a future release. ![]() That means unless the application has the authority to access a table, then calling a stored procedure that accesses the same table won’t work either. Unfortunately, at this time, MySQL doesn’t support “GRANT EXECUTE”. Applications can be granted execute privileges to the stored procedures, while being unable to access the tables directly. Security can be another advantage of stored procedures. Also, when implementing an n-tier application, stored procedures are used to separate the data layer from the server layer. Because stored procedures contain program logic, more processing can take place on the database server, which can reduce the amount of bandwidth consumed sending data back to the application. ![]() Another advantage of stored procedures is that the SQL can be “pre-compiled” increasing the speed of the application. One of the indirect benefits of using stored procedures is that application code becomes smaller and easier to understand. ![]() Stored procedures allow most database access logic to be separated from the application logic. These stored procedures can then be invoked by application programs thus eliminating the need for programmers with varying degrees of skill to create their own SQL. If you’re not familiar with stored procedures, they are collections of SQL commands and program logic stored on the database server. Make that past tense-the latest developer release, MySQL 5.0, does support stored procedures. There was, however, one valid complaint against MySQL-unlike its shrink-wrapped counterparts, such as Oracle or DB2, MySQL doesn’t support stored procedures. There are several reasons for this, from the misguided belief that open source is the software equivalent of a child’s wood shop project to the belief that nothing free is ever good. But in spite of this popularity many corporations are resistant to adopting MySQL. MySQL is “The World’s Most Popular Open Source Database,” at least according to the MySQL Web site. ![]() But starting with MySQL 5.0, that changed-now you can do stored procedures in this popular open source database. Some people resisted using MySQL because it had no support for stored procedures.
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