/*
* 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 compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.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 org.apache.tajo.plan.logical;
import org.apache.tajo.plan.expr.EvalNode;
/**
* An interface for logical node which is able to filter tuples.
*/
public interface SelectableNode {
/**
* Checking if it has filter condition
*
* @return True if it has filter condition. Otherwise, it will return false.
*/
public boolean hasQual();
/**
* Set a filter condition.
*
* @param eval EvalNode resulting in a boolean result.
*/
public void setQual(EvalNode eval);
/**
* Get a filter condition
*
* @return Filter Condition
*/
public EvalNode getQual();
}