[ https://issues.apache.org/jira/browse/HIVE-16816?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
slim bouguerra reassigned HIVE-16816: ------------------------------------- Assignee: slim bouguerra > Chained Group by support for druid. > ----------------------------------- > > Key: HIVE-16816 > URL: https://issues.apache.org/jira/browse/HIVE-16816 > Project: Hive > Issue Type: Sub-task > Components: Druid integration > Reporter: slim bouguerra > Assignee: slim bouguerra > Priority: Major > > This is more likely to be a calcite enhancement but am logging it here to > track it any way. > Currently queries like {code} select count (distinct dim) from table {code} > is pushed partially to druid as group by dim followed by a count executed by > hive QE. This can be enhanced by using the nested (eg chained execution) > group by query such as the first (inner) GB query does group by key and the > second (outer) does the count. -- This message was sent by Atlassian JIRA (v7.6.3#76005)