[ https://issues.apache.org/jira/browse/DRILL-6545?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Hanumath Rao Maduri updated DRILL-6545: --------------------------------------- Affects Version/s: (was: 1.13.0) > Projection Push down into Lateral Join operator. > ------------------------------------------------ > > Key: DRILL-6545 > URL: https://issues.apache.org/jira/browse/DRILL-6545 > Project: Apache Drill > Issue Type: Improvement > Components: Query Planning & Optimization > Reporter: Hanumath Rao Maduri > Assignee: Hanumath Rao Maduri > Priority: Major > Fix For: 1.14.0 > > > For the Lateral’s logical and physical plan node, we would need to add an > output RowType such that a Projection can be pushed down to Lateral. > Currently, Lateral will produce all columns from left and right and it > depends on a subsequent Project to eliminate unneeded columns. However, this > will blow up the memory use of Lateral since each column from the left will > be replicated N times based on N rows coming from UNNEST. We can have a > ProjectLateralPushdownRule that pushes only the plain columns onto LATERAL > but keeps the expression evalulations as part of the Project above the > Lateral. -- This message was sent by Atlassian JIRA (v7.6.3#76005)