Aman Sinha created CALCITE-3390: ----------------------------------- Summary: ITEM expression does not get pushed to the right input of left-outer-join Key: CALCITE-3390 URL: https://issues.apache.org/jira/browse/CALCITE-3390 Project: Calcite Issue Type: Bug Components: core Affects Versions: 1.21.0 Reporter: Aman Sinha Assignee: Aman Sinha
In the following query, the ITEM expression above the Left Outer Join does not get pushed to the right input (null-preserving input) of the join whereas it should since ITEM does not change the nullability. {noformat} explain plan without implementation for select tt7.columns[0], tt8.columns[0] as x from tt7 left outer join tt8 on tt7.columns[0] = tt8.columns[0]; DrillScreenRel DrillProjectRel(EXPR$0=[$1], x=[ITEM($2, 0)]) DrillJoinRel(condition=[=($0, $3)], joinType=[left]) DrillProjectRel($f2=[ITEM($0, 0)], ITEM=[ITEM($0, 0)]) DrillScanRel(table=[[dfs, tmp, tt7]], groupscan=[EasyGroupScan [selectionRoot=file:/tmp/tt7, numFiles=1, columns=[`columns`[0]], files=[file:/tmp/tt7/0_0_0.csv]]]) DrillProjectRel(columns=[$0], $f2=[ITEM($0, 0)]) DrillScanRel(table=[[dfs, tmp, tt8]], groupscan=[EasyGroupScan [selectionRoot=file:/tmp/tt8, numFiles=1, columns=[`columns`, `columns`[0]], files=[file:/tmp/tt8/0_0_0.csv]]]) {noformat} >From what I can tell, the change in behavior occurred with >https://issues.apache.org/jira/browse/CALCITE-1753 ; before that the ITEM was >pushed on both sides of the Left Outer Join. -- This message was sent by Atlassian Jira (v8.3.4#803005)