com.hazelcast.org.apache.calcite.rel.core.Minus Maven / Gradle / Ivy
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to you under the Apache License, Version 2.0
* (the "License"); you may not use this file except in com.hazelcast.com.liance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.com.hazelcast.org.licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.hazelcast.org.apache.calcite.rel.core;
import com.hazelcast.org.apache.calcite.plan.RelOptCluster;
import com.hazelcast.org.apache.calcite.plan.RelTraitSet;
import com.hazelcast.org.apache.calcite.rel.RelInput;
import com.hazelcast.org.apache.calcite.rel.RelNode;
import com.hazelcast.org.apache.calcite.rel.metadata.RelMdUtil;
import com.hazelcast.org.apache.calcite.rel.metadata.RelMetadataQuery;
import com.hazelcast.org.apache.calcite.sql.SqlKind;
import java.util.List;
/**
* Relational expression that returns the rows of its first input minus any
* matching rows from its other inputs.
*
* Corresponds to the SQL {@code EXCEPT} operator.
*
*
If "all" is true, then multiset subtraction is
* performed; otherwise, set subtraction is performed (implying no duplicates in
* the results).
*/
public abstract class Minus extends SetOp {
public Minus(RelOptCluster cluster, RelTraitSet traits, List inputs,
boolean all) {
super(cluster, traits, inputs, SqlKind.EXCEPT, all);
}
/**
* Creates a Minus by parsing serialized output.
*/
protected Minus(RelInput input) {
super(input);
}
@Override public double estimateRowCount(RelMetadataQuery mq) {
return RelMdUtil.getMinusRowCount(mq, this);
}
}