Package org.apache.calcite.rel.rules

Class UnionToValuesRule

java.lang.Object
org.apache.calcite.plan.RelOptRule
org.apache.calcite.plan.RelRule<UnionToValuesRule.Config>
org.apache.calcite.rel.rules.UnionToValuesRule
All Implemented Interfaces:
TransformationRule
@Enclosing public class UnionToValuesRule extends RelRule<UnionToValuesRule.Config> implements TransformationRule
Planner rule that converts Union with inputs only containing Values into an Values.

For example, 


 Union(all=[true])
     Values(tuples=[[{ 3, null }]])
     Values(tuples=[[{ 7369, null }]])
     Values(tuples=[[{ 1, 2 }]])

becomes 


 Values(tuples=[[{ 3, null }, { 7369, null }, { 1, 2 }]])

If (all = false), Values value will be set list.