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.SqlLiteral;
  import org.apache.calcite.sql.SqlNode;
  import org.apache.calcite.sql.SqlOperator;
  import org.apache.calcite.sql.parser.SqlParserPos;
  
  import org.checkerframework.checker.nullness.qual.Nullable;
  
  /**
   * A factory for creating {@link org.apache.calcite.sql.SqlCall}.
   */
  @FunctionalInterface
  public interface SqlCallFactory {
  
    /**
     * Creates a call to this operator with an array of operands.
     *
     * <p>The position of the resulting call is the union of the {@code pos}
     * and the positions of all of the operands.
     *
     * @param functionQualifier Function qualifier (e.g. "DISTINCT"), or null
     * @param pos               Parser position of the identifier of the call
     * @param operands          Array of operands
     */
    SqlCall create(
        SqlOperator operator,
        @Nullable SqlLiteral functionQualifier,
        SqlParserPos pos,
        @Nullable SqlNode... operands);
  }
  