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Db2 for z/OS

Showing 975

Introduce or Change Reorg for managing commits when generating Identity column values during the Reorg

When an identity column is added to an already existing and populated table, the table is put into a Reorg Pending status and thus unavailable to the applications. When the Reorg is run to resolve the status it generates the identity column values...
3 months ago in Db2 for z/OS 3 Future consideration

One-Fecht Index Scan for SELECT min(), max()

At the moment only a single SELECT min(a) or a SELECT max(a) uses a suitable index I(a, ...). When selecting both, min() and max(), a tablespace scan is used to determine the minimum and maximum value. With large tables this behaviour is very expe...
6 months ago in Db2 for z/OS 1 Not under consideration

IFCID 316 401 ZiiP Usage Statistics

Currently the IFCIDs 316 and 401 contains great data for monitoring and tuning SQLs. It would be excellent if these IFCIDs could be extended to include a separate set of ZiiP counters. IFCID 25 does this for Utilities at the moment.
almost 7 years ago in Db2 for z/OS 1 Planned for future release

Enhance command -DISPLAY PROFILE with keyword DETAIL

The -DISPLAY PROFILE command allows to determine if profiling is active or inactive on a specific DB2 member. The command returns output similar to: -display profile DSNT753I +DB2A DSNT1DSP DISPLAY PROFILE REPORT FOLLOWS: STATUS = ON TIMESTAMP = ...
almost 2 years ago in Db2 for z/OS 1 Future consideration

A View with Select * should be regenertated without Drop/Create View

We have a lot of views defined with Select *. Since DB2 V8 we have the option to add columns to the base table, but the view does not include the new column, which is ok and accepted. But to get the new column we have to drop and recreate the View...
over 12 years ago in Db2 for z/OS 1 Not under consideration

Write Failed Lock Escalation Attempts to Master

Currently, when Lock Escalation succeeds, a message is written to the Master Log with details. However, when a Lock Escalation attempt fails (due to a timeout or deadlock), nothing is written. This sort of timeout or deadlock can be difficult to d...
6 months ago in Db2 for z/OS 0 Future consideration

Db2 z/OS limitations with ALTER TABLESPACE MOVE TABLE

I love the upcoming FL508 and this new availability even though I have not used it. Looking deeper into the Knowledge Center there seems to be some limitations that I would like to see resolved. The two items are: a) Exist in the same data...
over 3 years ago in Db2 for z/OS 3 Not under consideration

INTERPRET Function for Packed-decimal Data

We have some old tables with a CHAR column where we store a record formatted by a Cobol Program. It contains a mix of display data and packed-decimal data. To use that data we have to read it in a Cobol program and interpret it using a Cobol copyb...
6 months ago in Db2 for z/OS 1 Not under consideration

remove limitations in workfile database which leedsto outages

When a workfile is created Db2 increments obid, when a workfile ist dropped the obid is not released by Db2. There is a restriction of maximum 500 workfiles. When the limit has been reached, no more work files can be created, SQL code -497 is retu...
almost 2 years ago in Db2 for z/OS 0 Future consideration

Avoid Reorg Abends by improving estimation of average row length

Today, for estimating the average row length being passed to sort, REORG gets that from catalog statistics with either AVGROWLEN or COMPRESSRATIO. The reason RTS stats is not used, is because RTS only contains the compressed data size.
over 5 years ago in Db2 for z/OS 0 Not under consideration

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