[ https://issues.apache.org/jira/browse/HIVE-7518?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Matt McCline updated HIVE-7518: ------------------------------- Summary: Output vectorized GROUP BY aggregate fields like AVG as columns so downstream reduce can be vectorized (was: Output of vectorized GROUP BY aggregate fields like AVG as columns so downstream operators can be vectorized) > Output vectorized GROUP BY aggregate fields like AVG as columns so downstream > reduce can be vectorized > ------------------------------------------------------------------------------------------------------ > > Key: HIVE-7518 > URL: https://issues.apache.org/jira/browse/HIVE-7518 > Project: Hive > Issue Type: Sub-task > Reporter: Matt McCline > Assignee: Matt McCline > > Today, aggregates like AVG are output from VectorGroupByOperator as a STRUCT. > This prevents downstream operators in map, reduce shuffle, and reduce from > being vectorized. > Take the STRUCT fields used for AVG (for example) and output them (vector) > columns. > NOTE: downstream VectorGroupByOperator needs to accept column form… > • That is, (reduce) merge of partial aggregates is different than map. -- This message was sent by Atlassian JIRA (v6.2#6252)