IBM Data and AI Ideas Portal for Customers


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Db2 for z/OS

Showing 793

DB2 SQLCA feedback field indicating if this UOW is blocking others

On DB2 12 CERT (V12-CERT-2017) we discussed the possibility of increasing concurrency in DB2. In a typical batch environment we try to balance #of commits towards concurrency using a so-called commit-control-system that will have COMMIT on a numbe...
over 7 years ago in Db2 for z/OS 1 Not under consideration

PieceMeal Delete without coding application

During CERT (V12-CERT-2017) it was a desire amongst several customers to get a sort of imbedded COMMIT in the new piecemeal DELETE - when running from TSO attachment.-Alternatively to allow procedural language (SQL PL like) syntax in SPUFI/DSNTEP2...
over 7 years ago in Db2 for z/OS 1 Not under consideration

For Dynamic Plan Stability, Only store the actual SQL statement in STMTTEXT column

While reviewing the SQL statements in SYSDYNQRY.STMTTEXT column, extra characters are added to the end of the SQL. This requires extra processing when comparing to the REAL SQL-text. In some cases, but not all, a compare like the following is need...
almost 2 years ago in Db2 for z/OS 1 Not under consideration

DCLGEN ignores hidden columns

We have defined columns with "IMPLICITLY HIDDEN" and want to generate the host variable declarations with the DCLGEN command which is described with"The declarations generator (DCLGEN) produces an SQL DECLARE TABLE statement and a COBOL, PL/I, or ...
over 9 years ago in Db2 for z/OS 1 Not under consideration

Increase (over current limit of 10000) the value for Zparm MAXARCH

Is it possible to increase (over current limit of 10000) the value for Zparm MAXARCH (archive log volumes that are to be recorded in the BSDS). Our Production System sometimes cuts over 5,000 Archive Logs in the business' standard Image Copy reten...
almost 4 years ago in Db2 for z/OS 1 Not under consideration

A Sort-Merge Join should be considered when joining on a SUBSTR expression

When tuning the following query, I saw that changing the "INNER JOIN" to a "FULL JOIN" caused it to perform many times better (which changed the join from a NLJ to a SMJ): SELECT ARCHIVE_STRT.LOCAL_TS AS LOCAL_TS_STRT, TIMESTAMPDIFF(2, CAST(ARCHIV...
almost 4 years ago in Db2 for z/OS 1 Not under consideration

Dynamically Defined Reorg Mapping Tables That Use An Implicitly Defined Database

Currently, the implicitly created database works great because every instance of a mapping table is in a separate database.This avoids any possibility of database lock contention across multiple concurrent instances of reorg.The downside of the im...
over 7 years ago in Db2 for z/OS 1 Not under consideration

REBIND STABILIZED DYNAMIC QUERY.

DB2 12 introduce Stabilized Dynamic Queries. A new Rebind command for Stabilized Dynamic Query is needed to operate Stabilized Dynamic Queries.The only way to Stabilize a query again after invalidation is to wait for a new execution of the stateme...
almost 8 years ago in Db2 for z/OS 0 Not under consideration

With RACF-exit, support auth cache refresh for RACF profiles with RACFVARS

Currently RACF ENF signals for the DB2 auth cache refresh are ignored if the profile contains a &RACFVAR class variable. This blocks the practical use of these profiles. In our case we have on one sysplex two different sets of DB2 subsystems(o...
almost 4 years ago in Db2 for z/OS 1 Not under consideration

Allow DBADM to grant on view created

Our DBA users connected to a RACF group that has DBADM authority should be allowed to grant on view that they can create.Even when the schema of the view is distinct.Today those DBA can create views thanks to DBACRVW, they should also be able to g...
almost 8 years ago in Db2 for z/OS 1 Not under consideration

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