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Improve poor query compilation performance due to long lock list traversal in DB2 10.1 and later
Beginning with DB2 LUW 10.1 DGTT-referencing DML started to take catalog locks and therefore we have to free them and potentially traverse long lock chain if the DML is a part of a long-running transaction potentially holding millions of locks. Th...
DB2 LUW to have option to ignore QUERYNO clause of SQL on DB2 z/OS
The client has many SQL for z/DB2 production environment with QUERYNO clause like the following sample. Â Â SELECT /* Comment */Â Â Â Â Â Â A_ID,Â Â Â Â Â Â A_NAMEÂ Â Â Â FROMÂ Â Â Â Â Â A_MASTERÂ Â Â Â WHEREÂ Â Â Â Â Â ...
need to provide a RENAME SCHEMA statement (other database products provide this)
Need RENAME SCHEMA other databases other than DB2 LUW (i.e. MaxDB from SAP) provide a statement RENAME SCHEMA to rename a schema like a RENAME TABLESPACE/TABLE/INDEX. Needed on all supported operating systems.
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