Ashutosh Chauhan created HIVE-11281:
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Summary: Memoize toStringTree() for ASTNode
Key: HIVE-11281
URL: https://issues.apache.org/jira/browse/HIVE-11281
Project: Hive
Issue Type: Bug
Components: Query Planning
Affects Versions: 1.2.0, 1.0.0, 1.1.0
Reporter: Ashutosh Chauhan
Assignee: Ashutosh Chauhan
Currently it defaults to BaseTree::toStringTree() which always computes it
recursively. For very large trees it becomes expensive. On one particular test
query compilation time went down from 55 seconds to 2 seconds.
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