IBM Data and AI Ideas Portal for Customers


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Status Not under consideration
Workspace Db2
Components BLU Acceleration
Created by Guest
Created on Dec 18, 2018

RELATED IDEAS

Create User Temporary Tables in round robin

Assuming that there is more than one temp tablespace with the same page size and 'IN TABLESPACE' clause is not specified in the DECLARE GLOBAL TEMPORARY TABLE command, then DB2 optimizer should allocate the temp tables across all temporary tablespaces of the page size and not just in one temp tablespace.

According to IBM documentation from the following link, DB2 optimizer will create new user temporary tables in round robin fashion if more than one user temporary tablespace of same page size exists. This is assuming that the 'IN TABLESPACE' clause has not been specified in the DECLARE GLOBAL TEMPORARY TABLE statement and all the users are granted 'USE IN' tablespace permission on all the temporary tablespaces.

https://www.ibm.com/support/knowledgecenter/en/SSEPGG_11.1.0/com.ibm.db2.luw.admin.dbobj.doc/doc/c0052067.html

In our environment, we are hitting the limit on maximum number of tables created in a user temporary tablespace (SQL0960C). We have several 100's of stored procedure where temp tables are created. Since the stored procedures are compiled/bound by the instance owner it doesn't make a difference that the user, who is executing the stored proc, has been granted USE of a specific temp tablespace. Regardless of that permission the temp table is getting created in the same temp tablespace. We had the following PMR opened with IBM with regards to this.

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