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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 updated HIVE-24362:
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Description: 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(300,000). The list of children can be cached in the AST node to avoid
this re-computation. The caching part is already fixed as part of HIVE-24031,
the allocation of array is fixed in this Jira. (was: 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. )
> 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(300,000). The list of children can be cached in the AST node to avoid
> this re-computation. The caching part is already fixed as part of HIVE-24031,
> the allocation of array is fixed in this Jira.
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