IBM Data and AI Ideas Portal for Customers


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Db2

Showing 988

Foreign key with on update "cascade"

As part of the SQL 92 standard, there is a referential action for foreign key that allows to update on cascade. The following link is the SQL 92 standard:http://www.contrib.andrew.cmu.edu/~shadow/sql/sql1992.txt In the Section 11.8, there is the f...
over 5 years ago in Db2 / Statements (DDL and DML) 0 Not under consideration

Preserve table creation timestamp after reorg-finsished using admin_move_table procedure (online table move)

Following Knowledge Center, https://www.ibm.com/support/knowledgecenter/en/SSEPGG_10.5.0/com.ibm.db2.luw.admin.perf.doc/doc/c0024850.htmlwe perform table reorg using admin_move_table . The issue is, after run admin_move_table command, the original...
over 5 years ago in Db2 / Utilities (Export Import Load db2look etc) 1 Not under consideration

MON_GET_CONNECTION is lacking CODEPAGE of connection

A 3rd party application connects to Db2 and we get SQL0302. The 3rd party vendor figures out, it is a double conversion to UTF-8One of the most valuable debugging informations was the codepage of the connection to the database, which is available ...
almost 6 years ago in Db2 / Monitoring 0 Not under consideration

Manually confirm whether to switch before TSAMP+HADR automatically switches

In the TSAMP+hadr environment, in the event of a failure, TSAMP will directly switch the active/standby relationship. Sometimes, it may solve the A machine failure recovery time, especially the AB machine transmits a large transaction log. Therefo...
almost 6 years ago in Db2 / High Availability and/or Disaster Recovery 1 Not under consideration

Partial early aggregation (PEA) in a federation system

Extend the Db2 optimizer combined with federation for partial early aggregation (PEA). Push down SQL queries to a federated database to reduce traffic from the remote source significantly.
almost 6 years ago in Db2 / Federation 0 Not under consideration

DB2 HADR Standby Database act as CDC Source

We use DB2 ,DB2 HADR and CDC in our production system. Now we can only use the DB2 HADR primary database as CDC source. DB2 HADR standby database can not support acting as CDC source now. So we hope add a new feature,ie : DB2 HADR Standby database...
almost 6 years ago in Db2 / High Availability and/or Disaster Recovery 2 Not under consideration

BigSql Strengthening on node failure

BigSql is built upon db2 database but it thus miss a major architecture philosophy of Hadoop:" handle failure "If you launch a query and one of the designated worker node fails (hardware failure) then the request fails instead of being restarted o...
almost 6 years ago in Db2 / BigSQL 0 Not under consideration

DB2 Instance Account Parameters

As per our company AD rules we need either the TSM (DB2) instance account to accept dashes '-' or for IBM to support AD Alias' See PMR - TS000957160
almost 6 years ago in Db2 / Configuration Parameters 0 Not under consideration

db2mtrk not reporting all of memory used

I would like to suggest an update in the documentation. A comment in the db2mtrk page saying that db2mtrk will not report all the memory elements as db2pd -dptnmem.
almost 6 years ago in Db2 / Monitoring 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
almost 6 years ago in Db2 / Other/Unknown 0 Not under consideration

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