[
https://issues.apache.org/jira/browse/TRAFODION-2317?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Hans Zeller closed TRAFODION-2317.
----------------------------------
> Implement relational operator for common subexpressions and transformation
> --------------------------------------------------------------------------
>
> Key: TRAFODION-2317
> URL: https://issues.apache.org/jira/browse/TRAFODION-2317
> Project: Apache Trafodion
> Issue Type: Sub-task
> Components: sql-cmp
> Affects Versions: 2.1-incubating
> Reporter: Hans Zeller
> Assignee: Hans Zeller
> Fix For: 2.2-incubating
>
>
> This subtask provides the infrastructure for handling common subexpressions:
> - A relational CommonSubExprRef operator to track the locations of common
> subexpressions in the query tree.
> - Methods to analyze the common subexpressions in the tree and to determine
> whether a transformation is possible and what the temporary table would look
> like.
> - Methods to do the actual query tree transformation.
> - Some needed changes in bookkeeping and runtime.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
