Gautam Kumar Parai created DRILL-6093: -----------------------------------------
Summary: Unneeded columns in Drill logical project Key: DRILL-6093 URL: https://issues.apache.org/jira/browse/DRILL-6093 Project: Apache Drill Issue Type: Bug Affects Versions: 1.12.0, 1.11.0 Reporter: Gautam Kumar Parai Assignee: Gautam Kumar Parai Fix For: 1.12.0 Here is an example query with the corresponding logical plan. The project contains unnecessary columns L_ORDERKEY, O_ORDERKEY in the projection even when it is not required by subsequent operators e.g. DrillJoinRel. EXPLAIN PLAN without implementation FOR SELECT L.L_QUANTITY FROM cp.`tpch/lineitem.parquet` L, cp.`tpch/orders.parquet` O WHERE cast(L.L_ORDERKEY as int) = cast(O.O_ORDERKEY as int); *+------+------+* *|* *text* *|* *json* *|* *+------+------+* *|* DrillScreenRel DrillProjectRel(L_QUANTITY=[$1]) DrillJoinRel(condition=[=($2, $4)], joinType=[inner]) DrillProjectRel(L_ORDERKEY=[$0], L_QUANTITY=[$1], $f2=[CAST($0):INTEGER]) DrillScanRel(table=[[cp, tpch/lineitem.parquet]], groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=classpath:/tpch/lineitem.parquet]], selectionRoot=classpath:/tpch/lineitem.parquet, numFiles=1, numRowGroups=1, usedMetadataFile=false, columns=[`L_ORDERKEY`, `L_QUANTITY`]]]) DrillProjectRel(O_ORDERKEY=[$0], $f1=[CAST($0):INTEGER]) DrillScanRel(table=[[cp, tpch/orders.parquet]], groupscan=[ParquetGroupScan [entries=[ReadEntryWithPath [path=classpath:/tpch/orders.parquet]], selectionRoot=classpath:/tpch/orders.parquet, numFiles=1, numRowGroups=1, usedMetadataFile=false, columns=[`O_ORDERKEY`]]]) -- This message was sent by Atlassian JIRA (v7.6.3#76005)