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Db2

Showing 988

Case TS000932532 - Load should be able to bypass a GENERATED-ALWAYS-from-variable column

ProblemA load on a table containing a certain type of GENERATED ALWAYS column fails with the very odd message "Unexpected load gencol section".Research pointed out that LOAD cannot handle in any way a GENERATED ALWAYS column getting its informatio...
almost 6 years ago in Db2 / Utilities (Export Import Load db2look etc) 0 Not under consideration

Provide certificate based authentication

We'd like to see certificate based authentication being offered for DB2 LUW and DSM.
almost 6 years ago in Db2 / Security 0 Not under consideration

ALTER TABLE LOCKSIZE TABLE for BLU tables

ALTER TABLE LOCKSIZE TABLE is an easy way to save lock list and lock acquire for tables that just get accessed by a single application at a given time.
almost 6 years ago in Db2 / BLU Acceleration 0 Not under consideration

LOAD should allow collecting STATISTICS without USE PROFILE option for row based tables

LOAD collects "default" statistics like auto-runstats when loading into BLU (RUNSTATS ... WITH DISTRIBUTION AND SAMPLED DETAILED INDEXES ALL).I assume this got not changed because the fear of incompatibility with existing behavior. Therefore pleas...
almost 6 years ago in Db2 / Utilities (Export Import Load db2look etc) 0 Not under consideration

auto-reorg OLR for cleanup of overflows

Auto-reorg should use online window to issue REORG CLEANUP OVERFLOWS (and also trigger a RUNSTATS afterwards).Problem to solve: SQL optimizer thinks overflow accesses are quite expensive and then might to start choosing different access plans that...
almost 6 years ago in Db2 / Utilities (Export Import Load db2look etc) 1 Not under consideration

Increase maximum numbers of columns in an index key from 64 to 120

Db2 has the lowest limit of allowed index columns compared to the competitors.
almost 6 years ago in Db2 / Tables/Index (Range MQ MDC etc.) 0 Not under consideration

Formula-based MAX_QUERYDEGREE settings.

MAX_QUERYDEGREE allows to specify the maximum degree of parallelism for a query. The setting of ANY is usually to aggressive for typical Db2 SAP systems. Specifying an absolute value has the disadvantage of having to adjust the parameter for every...
almost 6 years ago in Db2 / Configuration Parameters 0 Not under consideration

ITC tables for pureScale

ITC are very useful to have table that have large batch deletes on it. Then space reclaim is a quite easy and fast task using REORG RECLAIM EXTENTS ONLY.
almost 6 years ago in Db2 / Tables/Index (Range MQ MDC etc.) 0 Not under consideration

Support log switch under SET WRITE SUSPEND EXCLUDE LOGS

Today Db2 cannot switch to a log file while write suspend. Therefore a archive log gets performed at beginning of write suspend. Then the write suspend can only last and the database can only work until 1 log file gets full. The time a database is...
almost 6 years ago in Db2 / Backup/Restore/ Rollforward/ Recover 0 Not under consideration

Full STMM support for BLU

Today SORTHEAP and SHEAPTHRES_SHR need to be set to a fixed value to run BLU.The STMM tuned adjustment don't need to be highly sophisticated. E.g. keeping 60/40 ratio for bufferpool/sheapthres_shr and adjust sortheap as ratio taking the amount of ...
almost 6 years ago in Db2 / BLU Acceleration 0 Not under consideration

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