What Is Stored Procedure In Db2?

A stored procedure is a compiled program that can execute SQL statements and is stored at a local or remote Db2 server. You can invoke a stored procedure from an application program or from the command line processor.

Where are stored procedures stored in DB2?

DB2 Stored Procedures

As we have seen above, a stored procedure is a compiled program that can execute SQL statements. Stored procedures are stored at a local or remote DB2 LUW Server . Local DB2 LUW Server applications or remote DRDA applications can use the SQL statement CALL to invoke a stored procedure.

What is stored procedure why we use it?

A SQL stored procedure (SP) is a collection SQL statements and sql command logic, which is compiled and stored on the database. ... The main purpose of stored procedures to hide direct SQL queries from the code and improve performance of database operations such as select, update, and delete data .

How do I create a stored procedure in DB2?

Set up the workbench environment for stored procedure development. Connect to the GSDB sample database and create a data development project to work with the database. Create an SQL stored procedure. Deploy, debug, and run the stored procedure from the workbench.

What is stored procedure and its types?

SQL Server

A stored procedure is a group of Transact-SQL statements compiled into a single execution plan and stored under a name and processed as a unit . The Stored Procedure stage supports calling Microsoft SQL Server stored procedures (internal and external) and user-defined functions that return a single value.

What are the features of stored procedure?

Executable code is automatically cached and shared among users. This lowers memory requirements and invocation overhead. By grouping SQL statements, a stored procedure allows them to be executed with a single call . This minimizes the use of slow networks, reduces network traffic, and improves round-trip response time.

Is Db2 A Rdbms?

IBM Db2 is a family of data management products, including database servers, developed by IBM. It is a Relational Database Management System (RDBMS) which supports object-oriented features and non relational structure with XML. Db2 is designed to store, analyze and retrieve the data efficiently.

Why are stored procedures bad?

Stored procedures promote bad development practices , in particular they require you to violate DRY (Don’t Repeat Yourself), since you have to type out the list of fields in your database table half a dozen times or more at least. This is a massive pain if you need to add a single column to your database table.

What is difference between stored procedure and trigger?

A stored procedure is a user defined piece of code written in the local version of PL/SQL, which may return a value (making it a function) that is invoked by calling it explicitly. A trigger is a stored procedure that runs automatically when various events happen (eg update, insert, delete).

How does stored procedure work?

Stored procedures differ from ordinary SQL statements and from batches of SQL statements in that they are precompiled. ... Subsequently, the procedure is executed according to the stored plan . Since most of the query processing work has already been performed, stored procedures execute almost instantly.

What is result set in DB2 stored procedure?

In DB2, a stored procedure can process result set(s) returned by another stored procedure using RESULT_SET_LOCATOR type , ASSOCIATE RESULT SET LOCATORS and ALLOCATE CURSOR FOR RESULT SET statements. In Oracle you can use SYS_REFCURSOR type to pass result sets between stored procedures.

How do I run a stored procedure in DB2 LUW?

A stored procedure is unusable until it is defined. Use the CREATE PROCEDURE command to do this. You can either use the DB2 command prompt or place the command in a program and compile and run it. If you use the DB2 command prompt, you first connect to the DB2 LUW Server where the stored procedure will be executed.

What is lock in DB2?

A database lock is a mechanism utilized by Db2 to govern the access to a database object amongst different transactions . The following is a list of objects that Db2 usually regulates via the usage of locks: – Table. – Table partition.

What are the two types of stored procedures?

• System Defined Stored Procedure. These stored procedures are already defined in SQL Server. ...
• Extended Procedure. Extended procedures provide an interface to external programs for various maintenance activities. ...
• User-Defined Stored Procedure. ...
• CLR Stored Procedure.

What are types of procedure?

• Transform procedures.
• Source procedures.
• Target procedures.

Are stored procedures?

A stored procedure is a set of Structured Query Language (SQL) statements with an assigned name , which are stored in a relational database management system (RDBMS) as a group, so it can be reused and shared by multiple programs.