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.SqlFunction;
  import org.apache.calcite.sql.SqlFunctionCategory;
  import org.apache.calcite.sql.SqlKind;
  import org.apache.calcite.sql.SqlNode;
  import org.apache.calcite.sql.SqlWriter;
  import org.apache.calcite.sql.type.OperandTypes;
  import org.apache.calcite.sql.type.ReturnTypes;
  
  /**
   * Definition of the "TRANSLATE" built-in SQL function that takes 3 arguments.
   *
   * <p>Based on Oracle's {@code TRANSLATE} function, it is commonly called
   * "TRANSLATE3" to distinguish it from the standard SQL function
   * {@link SqlStdOperatorTable#TRANSLATE} that takes 2 arguments and has an
   * entirely different purpose.
   */
  public class SqlTranslate3Function extends SqlFunction {
    //~ Constructors -----------------------------------------------------------
  
    /**
     * Creates the SqlTranslate3Function.
     */
    SqlTranslate3Function() {
      super("TRANSLATE3",
          SqlKind.OTHER_FUNCTION,
          ReturnTypes.ARG0_NULLABLE_VARYING,
          null,
          OperandTypes.STRING_STRING_STRING,
          SqlFunctionCategory.STRING);
    }
  
    //~ Methods ----------------------------------------------------------------
  
    @Override public void unparse(SqlWriter writer, SqlCall call, int leftPrec,
        int rightPrec) {
      final SqlWriter.Frame frame = writer.startFunCall("TRANSLATE");
      for (SqlNode sqlNode : call.getOperandList()) {
        writer.sep(",");
        sqlNode.unparse(writer, leftPrec, rightPrec);
      }
      writer.endFunCall(frame);
    }
  
    @Override public String getSignatureTemplate(final int operandsCount) {
      if (3 == operandsCount) {
        return "{0}({1}, {2}, {3})";
      }
      throw new AssertionError();
    }
  
  }
  