content: /*
   * 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.calcite.rex;
  
  import java.util.List;
  
  /** Can reduce expressions, writing a literal for each into a list. */
  public interface RexExecutor {
  
    /** Reduces expressions, and writes their results into {@code reducedValues}.
     *
     * <p>If an expression cannot be reduced, writes the original expression.
     * For example, {@code CAST('abc' AS INTEGER)} gives an error when executed, so the executor
     * ignores the error and writes the original expression.
     *
     * @param rexBuilder Rex builder
     * @param constExps Expressions to be reduced
     * @param reducedValues List to which reduced expressions are appended
     */
    void reduce(RexBuilder rexBuilder, List<RexNode> constExps, List<RexNode> reducedValues);
  }
  