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.dialect;
  
  import org.apache.calcite.sql.SqlDialect;
  import org.apache.calcite.sql.SqlNodeList;
  import org.apache.calcite.sql.SqlWriter;
  
  /**
   * A <code>SqlDialect</code> implementation for an unknown ANSI compatible database.
   */
  public class AnsiSqlDialect extends SqlDialect {
  
    public static final Context DEFAULT_CONTEXT = SqlDialect.EMPTY_CONTEXT
        .withDatabaseProduct(SqlDialect.DatabaseProduct.UNKNOWN)
        .withIdentifierQuoteString("`");
  
    /**
     * A dialect useful for generating generic SQL. If you need to do something
     * database-specific like quoting identifiers, don't rely on this dialect to
     * do what you want.
     */
    public static final SqlDialect DEFAULT = new AnsiSqlDialect(DEFAULT_CONTEXT);
  
    /** Creates an AnsiSqlDialect. */
    public AnsiSqlDialect(Context context) {
      super(context);
    }
  
    /** Converts table scan hints.*/
    @Override public void unparseTableScanHints(SqlWriter writer,
        SqlNodeList hints, int leftPrec, int rightPrec) {
      writer.newlineAndIndent();
      writer.keyword("/*+");
      hints.unparse(writer, 0, 0);
      writer.keyword("*/");
    }
  
  }
  