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Posted to issues@trafodion.apache.org by "Alice Chen (JIRA)" <ji...@apache.org> on 2015/07/22 20:16:07 UTC

[jira] [Created] (TRAFODION-461) LP Bug: 1343642 - compiler: potential issue with ScanOptimizer::getNumActivePartitions

Alice Chen created TRAFODION-461:
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             Summary: LP Bug: 1343642 - compiler: potential issue with ScanOptimizer::getNumActivePartitions
                 Key: TRAFODION-461
                 URL: https://issues.apache.org/jira/browse/TRAFODION-461
             Project: Apache Trafodion
          Issue Type: Bug
          Components: sql-cmp
            Reporter: Ravisha Neelakanthappa
            Assignee: Ravisha Neelakanthappa
            Priority: Critical
             Fix For: 2.0-incubating


The function ScanOptimizer::getNumActivePartitions() is supposed to return how many partitions are going to accessed at runtime. 
This involves analyzing search key predicates and table partitions type (range or hash) so on. For example if the predicate is on key col like primary_key = <some existing col value>, this function should returns 1 active partition.

Fixing this function to return correct number of partitions is important for Trafodion because we deal with range partitions in HBase.



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