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.sql.fun;
  
  import org.apache.calcite.sql.SqlCall;
  import org.apache.calcite.sql.SqlKind;
  import org.apache.calcite.sql.SqlNode;
  import org.apache.calcite.sql.SqlPrefixOperator;
  import org.apache.calcite.sql.validate.SqlValidator;
  
  /**
   * SqlNewOperator represents an SQL <code>new specification</code> such as
   * <code>NEW UDT(1, 2)</code>. When used in an SqlCall, SqlNewOperator takes a
   * single operand, which is an invocation of the constructor method; but when
   * used in a RexCall, the operands are the initial values to be used for the new
   * instance.
   */
  public class SqlNewOperator extends SqlPrefixOperator {
    //~ Constructors -----------------------------------------------------------
  
    public SqlNewOperator() {
      super("NEW", SqlKind.NEW_SPECIFICATION, 0, null, null, null);
    }
  
    //~ Methods ----------------------------------------------------------------
  
    // override SqlOperator
    @Override public SqlNode rewriteCall(SqlValidator validator, SqlCall call) {
      // New specification is purely syntactic, so we rewrite it as a
      // direct call to the constructor method.
      return call.operand(0);
    }
  
    // override SqlOperator
    @Override public boolean requiresDecimalExpansion() {
      return false;
    }
  }
  