tajo-algebra/src/main/java/org/apache/tajo/algebra/CountRowsFunctionExpr.java

/*
 * Licensed 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.algebra;

/**
 * Describe a aggregation function count(*).
 */
public class CountRowsFunctionExpr extends GeneralSetFunctionExpr {
  public CountRowsFunctionExpr() {
    super(OpType.CountRowsFunction, "count", false, new Expr[] {});
  }

  @Override
  public int hashCode() {
    return "count_row".hashCode();
  }
}