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java版本的SQL语句解析源代码,包含demo(zql)
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文件大小: 218kb
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上传时间: 2010-03-03
详细说明: SQL语句解析java包,含源代码: SELECT ANTIQUEOWNERS.OWNERLASTNAME, ANTIQUEOWNERS.OWNERFIRSTNAME FROM ANTIQUEOWNERS, ANTIQUES WHERE ANTIQUES.BUYERID = ANTIQUEOWNERS.OWNERID AND ANTIQUES.ITEM = 'Chair'; Will result in a ZqlQuery structure. ZqlQuery's getSelect(), getFrom() and getWhere() methods will extract the SELECT, FROM and WHERE parts of the query. getSelect() will return a Vector of ZSelectItem, data structures that give information about the columns and/or operations requested (including SQL expression support, like in SELECT a+b FROM num;). getFrom() will return a Vector of ZFromItem, data structures that give information about the tables involved in the query. getWhere() will return a SQL expression, a data structure that represents ANTIQUES.BUYERID = ANTIQUEOWNERS.OWNERID AND ANTIQUES.ITEM = 'Chair' in the example above (the expression evaluator that comes with Zql can evaluate such expressions, for a given data tuple). ...展开收缩
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