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https://issues.apache.org/jira/browse/HIVE-24362?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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mahesh kumar behera resolved HIVE-24362.
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    Resolution: Fixed

Pushed to master. Thanks [~pgaref] for review.

> AST tree processing is suboptimal for tree with large number of nodes
> ---------------------------------------------------------------------
>
>                 Key: HIVE-24362
>                 URL: https://issues.apache.org/jira/browse/HIVE-24362
>             Project: Hive
>          Issue Type: Bug
>          Components: Hive
>            Reporter: mahesh kumar behera
>            Assignee: mahesh kumar behera
>            Priority: Major
>              Labels: pull-request-available
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> In hive the children information is stored as list of objects. During 
> processing of the children of a node, the list of object is converted to list 
> of Nodes. This can cause large compilation time if the number of children is 
> large. The list of children can be cached in the AST node to avoid this 
> re-computation. 



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