Yu Xu created CALCITE-7015:
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Summary: MinusToFilterRule should return empty Values when minus
Non-Filter RelNode
Key: CALCITE-7015
URL: https://issues.apache.org/jira/browse/CALCITE-7015
Project: Calcite
Issue Type: Improvement
Components: core
Affects Versions: 1.39.0
Reporter: Yu Xu
Assignee: Yu Xu
Fix For: 1.40.0
sql:
{code:java}
final String sql = "SELECT mgr, comm FROM emp WHERE mgr = 12\n"
+ "EXCEPT\n"
+ "SELECT mgr, comm FROM emp\n";
sql(sql)
.withPreRule(CoreRules.PROJECT_FILTER_TRANSPOSE)
.withRule(CoreRules.MINUS_TO_FILTER)
.check();{code}
result:
{code:java}
LogicalMinus(all=[false])
LogicalFilter(condition=[=($0, 12)])
LogicalProject(MGR=[$3], COMM=[$6])
LogicalTableScan(table=[[CATALOG, SALES, EMP]])
LogicalProject(MGR=[$3], COMM=[$6])
LogicalTableScan(table=[[CATALOG, SALES, EMP]]) {code}
should better convert to:
{code:java}
LogicalValues(tuples=[[]]) {code}
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