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https://issues.apache.org/jira/browse/HAWQ-1603?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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zhangshujie reassigned HAWQ-1603:
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Assignee: zhangshujie (was: Lei Chang)
> add new hook api for expressions
> --------------------------------
>
> Key: HAWQ-1603
> URL: https://issues.apache.org/jira/browse/HAWQ-1603
> Project: Apache HAWQ
> Issue Type: Sub-task
> Components: Query Execution
> Reporter: zhangshujie
> Assignee: zhangshujie
> Priority: Major
> Fix For: backlog
>
>
> 1.add new hook API for expressions
> 2.add new hook API for refactoring the plan tree
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