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.SqlFunction;
  import org.apache.calcite.sql.util.ReflectiveSqlOperatorTable;
  
  import com.google.common.base.Suppliers;
  
  import java.util.function.Supplier;
  
  /**
   * Operator table that contains only Oracle-specific functions and operators.
   *
   * @deprecated Use
   * {@link SqlLibraryOperatorTableFactory#getOperatorTable(SqlLibrary...)}
   * instead, passing {@link SqlLibrary#ORACLE} as argument.
   */
  @Deprecated // to be removed before 2.0
  public class OracleSqlOperatorTable extends ReflectiveSqlOperatorTable {
    //~ Static fields/initializers ---------------------------------------------
  
    /**
     * The table of Oracle-specific operators.
     */
    private static final Supplier<OracleSqlOperatorTable> INSTANCE =
        Suppliers.memoize(() ->
            (OracleSqlOperatorTable) new OracleSqlOperatorTable().init());
  
    @Deprecated // to be removed before 2.0
    public static final SqlFunction DECODE = SqlLibraryOperators.DECODE;
  
    @Deprecated // to be removed before 2.0
    public static final SqlFunction NVL = SqlLibraryOperators.NVL;
  
    @Deprecated // to be removed before 2.0
    public static final SqlFunction LTRIM = SqlLibraryOperators.LTRIM;
  
    @Deprecated // to be removed before 2.0
    public static final SqlFunction RTRIM = SqlLibraryOperators.RTRIM;
  
    @Deprecated // to be removed before 2.0
    public static final SqlFunction SUBSTR = SqlLibraryOperators.SUBSTR_ORACLE;
  
    @Deprecated // to be removed before 2.0
    public static final SqlFunction GREATEST = SqlLibraryOperators.GREATEST;
  
    @Deprecated // to be removed before 2.0
    public static final SqlFunction LEAST = SqlLibraryOperators.LEAST;
  
    @Deprecated // to be removed before 2.0
    public static final SqlFunction TRANSLATE3 = SqlLibraryOperators.TRANSLATE3;
  
    /**
     * Returns the Oracle operator table, creating it if necessary.
     */
    public static OracleSqlOperatorTable instance() {
      return INSTANCE.get();
    }
  }
  