[ https://issues.apache.org/jira/browse/CALCITE-6438?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Caican Cai reassigned CALCITE-6438: ----------------------------------- Assignee: Caican Cai > Add optimization to returns empty when the filter operator is a false instance > ------------------------------------------------------------------------------ > > Key: CALCITE-6438 > URL: https://issues.apache.org/jira/browse/CALCITE-6438 > Project: Calcite > Issue Type: New Feature > Components: core > Affects Versions: 1.37.0 > Reporter: Caican Cai > Assignee: Caican Cai > Priority: Major > Labels: pull-request-available > Fix For: 1.38.0 > > > {code:java} > select * from emp where false{code} > The current logical plan in calcite is > {code:java} > LogicalProject(EMPNO=[$0], ENAME=[$1], JOB=[$2], MGR=[$3], HIREDATE=[$4], > SAL=[$5], COMM=[$6], DEPTNO=[$7], SLACKER=[$8]) > LogicalFilter(condition=[false]) > LogicalTableScan(table=[[CATALOG, SALES, EMP]]) {code} > It can be optimized to > {code:java} > LogicalProject(EMPNO=[$0], ENAME=[$1], JOB=[$2], MGR=[$3], HIREDATE=[$4], > SAL=[$5], COMM=[$6], DEPTNO=[$7], SLACKER=[$8]) > LogicalValues(tuples=[[]]) {code} -- This message was sent by Atlassian Jira (v8.20.10#820010)