Table of Contents
What is plan package and collection in DB2?
The package or group of packages (collections) are binded into a plan. A plan is an executable object which contains the DB2 access paths of all the SQL queries within it. We can bind a package into a plan directly or we can first generate a collection using package(s) and then bind it to a plan.
Which is better plan or package in DB2?
An application plan contains a list of package names. Db2 applications require an application plan. Packages make application programs more flexible and easier to maintain. In general, you create plans and packages by using the Db2 commands BIND PLAN and BIND PACKAGE.
What are the bind parameters in DB2?
Bind Parameters in Db2 12
| Option | Valid values | Plan |
|---|---|---|
| OWNER | Authorization-id | X |
| Determines the authorization ID or the owner of the object (plan or package) | ||
| PACKAGE | Location-name.collection-id. package-id(version-id) | |
| (*) – Rebind Only |
What is Pklist in DB2?
The PKLIST option determines the packages to include in a package list. The NOPKLIST option deletes packages from a package list.
What is cursor in DB2?
Db2 has a mechanism called a cursor . Using a cursor is like keeping your finger on a particular line of text on a printed page. In Db2, an application program uses a cursor to point to one or more rows in a set of rows that are retrieved from a table.
Why do we need bind in DB2?
The DBRM contains the SQL statements that the DB2 precompiler has extracted from the application program. In the bind process, the SQL statements in the DBRM are put into an operational (“bound”) form, by being translated into the control structures that DB2 uses when it runs SQL statements.
What is Pklist?
What are DB2 locks?
The mode of a lock tells what access to the locked object is permitted to the lock owner and to any concurrent processes. Db2 uses of the lock modes to determine whether one lock is compatible with another. Some lock modes do not exclude all other users.
What is Sqlerrd in Db2?
sqlerrd[0] SQLERR(1) INTEGER. For a sensitive static cursor, contains the number of rows in a result table when the cursor position is after the last row (that is, when SQLCODE is equal to +100). On successful return from an SQL procedure, contains the return status value from the SQL procedure.
What is precompiler in Db2?
The Db2 precompiler scans a program and copies all of the SQL statements and host variable information into a DBRM (database request module). The precompiler also returns source code that has been modified so that the SQL statements do not cause errors when you compile the program.
How many types of cursors are there in Db2?
There are two types of Scrollable cursors depending upon their sensitivity with other application updates.
What is a DB2 UDB package?
When DB2 UDB processes SQL statements, each individual SQL request is mapped to a specific package. For a SQL statement to be processed, it must be associated with a DB2 UDB package. This is the case for application requests such as PREPARE, FETCH, and CLOSE.
What is a primary key in DB2?
Db2 primary key overview A primary key of a table is a column or group of columns whose values uniquely identify every row in the table. Each table has one and only one primary key. A primary key is optional.
What is the DB2 catalog?
Db2 for z/OS® maintains a set of tables (in database DSNDB06) called the Db2 catalog. These topics describe that catalog by describing the columns of each catalog table. The catalog tables describe such things as table spaces, tables, columns, indexes, privileges, application plans, and packages.
What is BND file in DB2?
The latter can be stored in a file, called a bindfile (.bnd), or directly submitted to DB2 UDB as part of the bind step. Binding is the step where the SQL information extracted from an application source file is analyzed and stored in the DB2 UDB catalog tables.