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.rel.type.RelDataType;
  import org.apache.calcite.sql.SqlKind;
  import org.apache.calcite.sql.SqlOperatorBinding;
  import org.apache.calcite.sql.type.SqlTypeUtil;
  import org.apache.calcite.sql.validate.SqlValidatorUtil;
  
  import static java.util.Objects.requireNonNull;
  
  /**
   * Definition of the SQL:2003 standard ARRAY constructor, <code>ARRAY
   * [&lt;expr&gt;, ...]</code>.
   */
  public class SqlArrayValueConstructor extends SqlMultisetValueConstructor {
    public SqlArrayValueConstructor() {
      super("ARRAY", SqlKind.ARRAY_VALUE_CONSTRUCTOR);
    }
  
    @Override public RelDataType inferReturnType(SqlOperatorBinding opBinding) {
      RelDataType type =
          getComponentType(
              opBinding.getTypeFactory(),
              opBinding.collectOperandTypes());
      requireNonNull(type, "inferred array element type");
  
      // explicit cast elements to component type if they are not same
      SqlValidatorUtil.adjustTypeForArrayConstructor(type, opBinding);
  
      return SqlTypeUtil.createArrayType(
          opBinding.getTypeFactory(), type, false);
    }
  }
  