IBM Data Platform Ideas Portal for Customers


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Search results: Db2 for z/OS

Showing 129 of 1690

Correct wrong data in IFCID0172 QW0172HQ/QW0172Q1 when package changes occur during waiting/deadlocking

The issue is that 1.- Thread 1 and Thread 2 get locks 2.- Thread 1 changes packages 3.- Thread 1 and 2 deadlock 4.- Thread 1 is chosen as blocker and deadlock processing uses user data from Thread 1's waiter, but the package dependent information ...
over 2 years ago in Db2 for z/OS 0 Future consideration

Allow for "OPTIMIZE FOR n ROWS" to be added to DELETE, UPDATE Statements

OPTIMIZE FOR 1 ROW can be added to SELECT SQL. One reason may be to influence the optimizer to chose one index over another, or to not perform a SORT with List Prefetch Adding OPTIMIZE FOR 1 ROW to a DELETE statement results in an error: EXPLAIN A...
over 4 years ago in Db2 for z/OS 1 Not under consideration

Improve implicit casting

Since V10 there is implicit casting, which is one hand a good feature, but on the other hand can lead to big performance problems. Improve the implicit casting so that the resulting datatype is indexable, e.g. make SELECT ... FROM T1 WHERE Integer...
about 11 years ago in Db2 for z/OS 1 Delivered

DB2 Z/OS Sync Logical and Physical Parts after full Reorg

ADD PART was used to insert a new physical partition in the middle of a tablespace. Now the Logical and Physical partitions are mismatch. If a Full Reorg on the full tablespace is performed, the utility can include an option to resync the logical ...
over 4 years ago in Db2 for z/OS 1 Not under consideration

select ... from final table ( update table for portion of business time from ... )

the problem is that an update table for portition of business time can effect more than 1 row and if this is made in a bitemporal environment the System Start is set to the first change timestamp. But you didn't know the exact time you have to rea...
almost 4 years ago in Db2 for z/OS 1 Not under consideration

Allow for LISTDEF processing when using CHECK Utility

Details: 1) Manual does not mention use of "LIST" on the "CHECK DATA" page. Example proposed syntax: LISTDEF CHKLIST INCLUDE TABLESPACE DB123.* CHECK LIST CHKLIST SCOPE ALL EXCEPTIONS 0 SORTDEVT WORK
almost 10 years ago in Db2 for z/OS 1 Not under consideration

Improve DB2 DBD pool processing to prevent full and provide better diagnostics

Improve DB2 DBD pool processing by1) providing a dynamic increase process to help prevent full conditions (and therefore thread failures)2) providing better diagnostics to identify the DBD's consuming the most non-stealable space. Optionally - ide...
over 8 years ago in Db2 for z/OS 1 Delivered

Sorting large amounts of data sequentially

We executed a query where a large amount of data had to be sorted. The execution stopped with SQLCODE -904 (temp. storage exceeded). This query was executed with DEGREE 1. When we executed the same query with DEGREE ANY, the query was executed by ...
almost 2 years ago in Db2 for z/OS 1 Not under consideration

allow SELECT with LISTAGG function to always allow ORDER BY

I am using DB2 Version 12. function level 501 I have a simple SQL example I show my co-workers to show the power of new DB2 SQL function of LISTAGG SELECT IXCREATOR, IXNAME ,LISTAGG(ALL COLNAME,',') WITHIN GROUP (ORDER BY COLSEQ) AS ALL_COLS ...
about 6 years ago in Db2 for z/OS 6 Delivered

Allow 3 different options for statement concentration.

We would like 3 options for statement concentration. It is importantthat all three options are available. 1. No concentration. (already exists) 2. Concentrate queries that have no parameter markers (Current DB2 concentration) 3. Concentrate querie...
about 12 years ago in Db2 for z/OS 1 Not under consideration

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