The pending state is set when the image copy is required for the table space or when the INDEX is in rebuild status. In this case a COPY PENDING/ REBUILD PENDING flag is set. We can repair this state by using the below JCL step.//STEP010 EXEC DSNUPROC REPAIR SET INDEX ... Read More

The tablespace reorganization is used to reorganize the data present in the system in order to reclaim the free space. This free space can be utilized to store the new data and therefore reorganization is very useful from a memory utilization point of view. We can reorganize any tablespace using ... Read More

The DB2 RUNSTAT utility records the details of tablespace, table, index, etc in the system catalog. The RUNSTAT generates the data like space available in table space, indexes, access paths, etc. We can use the below JCL step to update the catalog statistics of DB2 tablespace TABSPAC2 and to sample ... Read More

We can start the DB2 database by giving below command in panelDB2 ACTIVATE DSNDB001The DB2 ACTIVATE is followed by the name of the database which needs to be started.

The DB2 provides an utility RECOVER which is used to restore the tablespace. This utility uses image copy and DB2 logs to restore the changes. The following command can be used to recover the tablespace to the last image copy that was taken.RECOVER TABLESPACE DBSET1.TABSPAC1 TOLASTCOPYThe RECOVER TABLESPACE is followed ... Read More

The MERGECOPY is just opposite of IMAGECOPY. This DB2 utlility is used to combine the multiple image copy datasets into a new full or incremental image copy. This is mainly used to restore the backup in the DB2 table.The below JCL step can be used for the incremental MERGECOPY for ... Read More

The declared temporary tables are also non-permanent tables but unlike created temporary tables they can be defined in the application program. The existence of a declared temporary table is limited to program execution. Since the declared temporary tables are created and deleted at the runtime, their entries are not stored ... Read More

The Created temporary tables are non-permanent DB2 tables that exist as long as the process using this table is active. For example any batch program. The created temporary tables are best suited for the sequential access and hence system performance is not a concern over here.The created temporary tables can ... Read More

To get a DB2 view definition we can use the SYSIBM.SYSVIEW DB2 system table. The SYSVIEW table stores the details about all the views that exist in DB2. We can give below SQL statement to find the view definition.SELECT NAME, SEQNO, TEXT    FROM SYSIBM.SYSVIEWS WHERE NAME = ‘VIEW1’   ... Read More

SYSIBM.SYSTABAUTH is a DB2 system table which records the privileges that users/program hold on tables and views. We can use this table to find out the list of programs accessing a particular table and what action the program is performing on the table like SELECT, UPDATE, INSERT or DELETE. The ... Read More