001 /* 002 // $Id: SymbolType.java 482 2012-01-05 23:27:27Z jhyde $ 003 // 004 // Licensed to Julian Hyde under one or more contributor license 005 // agreements. See the NOTICE file distributed with this work for 006 // additional information regarding copyright ownership. 007 // 008 // Julian Hyde licenses this file to you under the Apache License, 009 // Version 2.0 (the "License"); you may not use this file except in 010 // compliance with the License. You may obtain a copy of the License at: 011 // 012 // http://www.apache.org/licenses/LICENSE-2.0 013 // 014 // Unless required by applicable law or agreed to in writing, software 015 // distributed under the License is distributed on an "AS IS" BASIS, 016 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 017 // See the License for the specific language governing permissions and 018 // limitations under the License. 019 */ 020 package org.olap4j.type; 021 022 /** 023 * The type of a symbolic expression. 024 * 025 * <p>Symbols are identifiers which occur in particular function calls, 026 * generally to indicate an option for how the function should be executed. 027 * They are similar to an enumerated type in other 028 * languages. 029 * 030 * <p>For example, the optional 3rd argument to the <code>Order</code> function 031 * can be one of the symbols <code>ASC</code>, <code>DESC</code>, 032 * <code>BASC</code>, <code>BDESC</code>. The signature of the 033 * <code>Order</code> function is therefore 034 * 035 * <blockquote> 036 * <code>Order(<Set>, <Scalar expression> [, <Symbol>])</code> 037 * </blockquote> 038 * 039 * and 040 * 041 * <blockquote> 042 * <code>Order([Store].Members, [Measures].[Unit Sales], BDESC)</code> 043 * </blockquote> 044 * 045 * would be a valid call to the function. 046 * 047 * @author jhyde 048 * @since Feb 17, 2005 049 * @version $Id: SymbolType.java 482 2012-01-05 23:27:27Z jhyde $ 050 */ 051 public class SymbolType extends ScalarType { 052 053 /** 054 * Creates a symbol type. 055 */ 056 public SymbolType() { 057 } 058 059 } 060 061 // End SymbolType.java