IBM Data and AI Ideas Portal for Customers


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Db2 for z/OS

Showing 985

Db2: Recovery of Mainframe Db2 databases without applying changes.

When the DB2 is performing a recover it uses log and copy files, it may be some sitations where the log contains changes that we dont want to restore. For exemple we may have inserts made by an authorized program and also updates performed by an u...
9 months ago in Db2 for z/OS 1 Not under consideration

Enhance Db2 FTB analytics function Db2 V12

Started last weeks activating FTB in development systems by using ZPARM DSN6SPRM.INDEX_MEMORY_CONTROL. Tried to get information using -DISPLAY STATS(INDEXMEMORYUSAGE) LIMIT(*) -DISPLAY STATS(INDEXTRAVERSECOUNT). i thought i will get deeper to it b...
over 1 year ago in Db2 for z/OS 1 Not under consideration

Index support for "expression op expression"

In our environment, we have many queries with predicate: "expression op expression". As they don't use indexes they're performing a table scan. We would like DB2 to be able to use indexes to resolve this type of predicate. Examples: SELECT [id], [...
about 3 years ago in Db2 for z/OS 1 Not under consideration

Db2 z/OS real storage management (Case TS006310627)

After the observation of a significantly increase of the CPU consumption in our Db2-MSTR regions, we opened case TS006310627 at IBM since the reason was not evident. The result of the analysis with IBM showed up that probably APAR PH31684 caused t...
about 3 years ago in Db2 for z/OS 0 Not under consideration

UUID support

Provide support for UUIDs. Eg - function to create , format and default value for column.
about 6 years ago in Db2 for z/OS 0 Not under consideration

Enhance package dependency quiescing/locking behavior of EXCHANGE

Enhance package dependency quiescing/locking behavior of EXCHANGE, so it will be possible to exchange base- and clone-table in parallel to (many) transactions reading one of these tables in parallel .
about 11 years ago in Db2 for z/OS 1 Not under consideration

DB2 enhancement for REUSASID=YES

Please add functionality for REUSASID=YES to DB2 product. REUSASID=YES is not currently supported by DB2 z/OS. Since DB2 does not support REUSASID=YES, the ASID is not reusable until IPL.
over 6 years ago in Db2 for z/OS 1 Not under consideration

Reset an invalidated statement level optimization hint

If a statement level optimization hint was invalidated for whatever reason one has to repeat the whole process to get the same hint again.
over 10 years ago in Db2 for z/OS 1 Not under consideration

LOAD Replace improvement for RI tables

We had a Db2 DDL change where a new table "b" was created with a RI constraint to a parent table "a" which was also modified (DROP/CREATE). Table "a" had several rows which were unloaded before the change and loaded back after the DDL changes (LOA...
10 months ago in Db2 for z/OS 1 Not under consideration

Index on RTS versioned History tables

In our environment, we retain the RTS history data for 1 year. Tables are going to grow large due to the busy environment we have.. We would need secondary indexes on these tables. Right now there is none. Since its a years data to analyze the rat...
almost 5 years ago in Db2 for z/OS 0 Not under consideration

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