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I went to use this marvelous feature on windows.. and for my surprise external tables are not implemented for this platform :-( (v11.5) Why ? Please, add support for external tables usage on windows hosts as well .
System Tables should come with STATISTIC PROFILE set from factory
We all know how important STATISTICS are, and more specially, how they are captured for each particular table ! Documentation says that DBA and application sholuld determine best options, based on usage.. but ibm is lacking to do the same fo...
Increase the number of ALTER TABLE operations that can be performed online without placing the table in "reorg pending" state
There are a few operations that seem to place the table into "reorg pending" state immediately when it should be possible to treat them as REORG-recommended.For example, any ALTER COLUMN .. DROP COLUMN statement that doesn't affect indexes should ...
Increase the number of REORG-recommended operations allowed before a full offline reorg must be performed
The current documentations in v11.5 indicate that only 3 units of work containing REORG-recommended operations are allowed.https://www.ibm.com/support/knowledgecenter/SSEPGG_11.5.0/com.ibm.db2.luw.sql.ref.doc/doc/r0000888.html"There can be up to t...
IBM.ENtityFramework.Core To Scaffold Indexes Properly
We used latest released IBM EF Core nuget packages to add DB2 Support to our application with existing DB2 database. Scaffolding the DB out to Models and usable DBContext time and again. We realized on comparing DB2 server that 90% of the indexe...
Remove The Need To REORG A Table Up On Performing Table Alter/REORG Recommended Operations
Today when we perform certain operations aka REORG recommended operations against a table like adding columns, dropping columns, changing datatype of a column, altering NULLABILITY of a column etc. the table will be put in a state called REORG pen...
Recommend/evaluate indexes – more information for each index
This is a point for tuning with indexes -> Tuning with indexes is still very common and useful.While using recommend and evaluate indexes it is possible to investigate each recommended index by updating USE_INDEX column in the table ADVISE_INDE...
Reduce Time Required for Online(Inplace) Reorg for huge tables
1) Inplace reorg will take time more for the tables with huge data say for example 1 TB2) To Reduce the time for this we want to avoid full table scan hence we need to look in portions of the data in a table where it is getting fragmented3) Hence...
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