IBM Data and AI Ideas Portal for Customers


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Other/Unknown

Showing 59

adjust card estimates on predicates using both COL = '?' and COL > <value> similar to accounting for NUMNULLS

Component: DB2 optimizer When a column is NULLable, a predicate COL = ? will account for numnulls to estimate cardinality. The problem comes when column is NOT NULL, and "the NULL value" is a real value. Peoplesoft has been designed to use a major...
over 1 year ago in Db2 / Other/Unknown 0 Not under consideration

Get sequence's NEXTCACHEREFRESHVALUE from cache.

Please see the attached word document and as our development teams are trying to retrieve the NEXTCACHEREFESHVALUE value after ALTER SEQUENCE ..RESTART and before invoking NEXT VALUE but could not able to find the way to get the value of NEXT CACH...
over 1 year ago in Db2 / Other/Unknown 0 Future consideration

Lock access plan for a query. Prevent the optimizer from changing a plan, once a "good" plan has been determined.

We see cases where a large query runs fine, and something changes the stats, which causes the optimizer to choose a really bad plan. We would like to be able to lock an individual query, and tell the optimizer: "Just use this plan".
about 6 years ago in Db2 / Other/Unknown 0 Not under consideration

default tablespace for a user

in DB2 there is no way to fix a default tablespace of user.
almost 5 years ago in Db2 / Other/Unknown 1 Not under consideration

I'd like you to consider to add new stored procedure ADMIN_TASK_CANCEL ( like in the DB2 z/OS version https://www.ibm.com/docs/en/db2-for-zos/12?topic=db2-admin-task-cancel) in the next fix/mod/main version of DB2?

Because now I can't stop the running procedure scheduled via ATS unless I stop the instance manager.
12 months ago in Db2 / Other/Unknown 1 Submitted

Enhance ALTER INDEX to have MINPCTUSED option (Online)

Allow online ALTER INDEX ... MINPCTUSED %;
about 6 years ago in Db2 / Other/Unknown 0 Not under consideration

Incorporate Trace suspend option into Quiesce command

We want to remove the suspending of the incoming connections via db2trc command and make "quiesce command with force connections" do the same thing as db2trc is doing currently.
about 6 years ago in Db2 / Other/Unknown 0 Not under consideration

Support Snapshot Isolation Level

Today, when our ETL jobs scan large amounts of data from a table with out using RS/RR isolation levels under certain conditions they see duplicate data and/or missing data. This could be caused due to the fact that rows that were already scanned c...
about 4 years ago in Db2 / Other/Unknown 0 Not under consideration

Optimizer should ignore RTRIM when calculation filter factor

When the optimizer calculates the filter factor for a predicate which uses RTRIM, it just returns the default value. (0.04)It should ignore the RTRIM and use the COLCARD of the column stats instead. Refer to Case: TS001114316
over 6 years ago in Db2 / Other/Unknown 0 Not under consideration

Enhance IBM My Notifications with Affected DB2 Version Information

Currently we subscribe to the IBM 'My Notifications' email (see: https://www.ibm.com/support/knowledgecenter/en/SSEPGG_10.5.0/com.ibm.db2.luw.admin.trb.doc/doc/t0060379.html or https://www-01.ibm.com/support/docview.wss?uid=swg21686621) so we rece...
over 5 years ago in Db2 / Other/Unknown 0 Not under consideration

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