Rajesh Balamohan created HIVE-16746:
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Summary: Reduce number of index lookups for same table in
IndexWhereTaskDispatcher
Key: HIVE-16746
URL: https://issues.apache.org/jira/browse/HIVE-16746
Project: Hive
Issue Type: Bug
Reporter: Rajesh Balamohan
Priority: Minor
{{IndexWhereTaskDispatcher}} is used when {{hive.optimize.index.filter=true}}.
It lists all indices for the table and depending on the query complexity, this
ends up being in the hotpath. For e.g, Q14 explain plan takes 180-200 seconds
and this index querying multiple times for same tables take up 30-40 seconds.
This function was invoked around 24000 times for same set of tables.
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