Hive Operators should calculate the value of common expressions just once
-------------------------------------------------------------------------
Key: HIVE-364
URL: https://issues.apache.org/jira/browse/HIVE-364
Project: Hadoop Hive
Issue Type: Improvement
Components: Serializers/Deserializers
Reporter: Zheng Shao
Currently, if we have "t.a + t.b" in 2 different expressions in the select
clause / where clause, we are computing it twice.
We should cache the value of the expression evaluation result to save CPU time.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
