LogicalUnionToPhysicalUnion.java

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package org.apache.doris.nereids.rules.implementation;

import org.apache.doris.nereids.rules.Rule;
import org.apache.doris.nereids.rules.RuleType;
import org.apache.doris.nereids.trees.plans.physical.PhysicalUnion;

/**
 * Implementation rule that convert logical Union to Physical Union.
 */
public class LogicalUnionToPhysicalUnion extends OneImplementationRuleFactory {
    @Override
    public Rule build() {
        return logicalUnion().then(union ->
            new PhysicalUnion(union.getQualifier(),
                    union.getOutputs(),
                    union.getRegularChildrenOutputs(),
                    union.getConstantExprsList(),
                    union.getLogicalProperties(),
                    union.children())
        ).toRule(RuleType.LOGICAL_UNION_TO_PHYSICAL_UNION);
    }
}