IBM Data and AI Ideas Portal for Customers


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Informix

Showing 524

Support for datetime with timezone

Informix currently lacks an SQL standard datatype to store datetime/timestamp with timezone. This datatype is supported on other databases with different datatypes names: “TIMESTAMP WITH TIME ZONE/LOCAL TIME ZONE” in Oracle “TIMESTAMP WITH TIME ZO...
about 1 year ago in Informix / Informix Server 0 Under review

A tool to copy/synchronize database schemas between environments.

A tool to copy/synchronize database schemas between environments. Dbschema does not help if a test environment needs a schema refresh. A tool is needed to unload the schema and then apply the schema into another environment generating with not jus...
over 1 year ago in Informix / Informix Server 0 Not under consideration

Allow indexes to be made invisible to queries

When removing unused indexes the first step we want is to be able to make index invisible to queries similar to the Oracle feature. As the index is still being maintained the rollback to make the index visible to queries is quick.
over 3 years ago in Informix / Informix Server 2

UPDATE STATISTICS MEDIUM/HIGH with PDQ should favour use of indices for sort when more than one column is specified

Currently (in my testing) any UPDATE STATISTICS MEDIUM/HIGH statement with PDQ specifying more than one column will not use indices for sort and will instead scan the table, write to temporary files and sort. This is true even when all columns spe...
over 1 year ago in Informix / Informix Server 0 Not under consideration

Sort data calculations should not be used to determine number of passes for UPDATE STATISTICS MEDIUM/HIGH statements where an index is used, fix misleading explain output

UPDATE STATISTICS MEDIUM/HIGH can be used with an explain option. The explain file always shows a sort data calculation which then determines the number of table scans (passes) the database engine will undertake. These are calculated before any de...
over 1 year ago in Informix / Informix Server 0 Not under consideration

Do not allocate MGM memory to UPDATE STATISTICS MEDIUM/HIGH with PDQ if index is used for sort

If an UPDATE STATISTICS MEDIUM/HIGH statement with PDQ is run, Informix will allocate memory for sorts from the memory grant manager (MGM). This happens regardless of whether there is any sorting to do. If a single indexed column is specified in t...
over 1 year ago in Informix / Informix Server 0 Not under consideration

Avoid UPDATE STATISTICS [LOW] sampling failures due to data skew

If onconfig parameter USTLOW_SAMPLE is set, sampling will be used for all UPDATE STATISTICS LOW commands. On some tables this will always or nearly always fail due to data skew, printing a message like: Warning: update statistics low using samplin...
over 1 year ago in Informix / Informix Server 1 Not under consideration

32k pagesize dbspace

Informix has the 16775134 pages limit for one fragment. the rowsize of some user table is very wide. for those tables , if the pagesize is more big, it's small change to reach the limitation.
about 6 years ago in Informix / Informix Server 0 Planned for future release

Add onconfig parameter to not allow slow alters.

Add an onconfig parameter so that slow alters are not allowed by default. This is to prevent outages for customers from long transaction rollbacks.
almost 4 years ago in Informix / Informix Server 0 Not under consideration

ifxclone to not change BUFFERPOOLS

ifxclone to not change BUFFERPOOLS when running.
over 1 year ago in Informix / Informix Server 0 Not under consideration

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