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1. 发明授权

US07289978B2 Substituting parameter markers for literals in database query language statement to promote reuse of previously generated access plans 失效
标题翻译：在数据库查询语言语句中替换文字的参数标记，以促进先前生成的访问计划的重用
公开(公告)号：US07289978B2
公开(公告)日：2007-10-30
申请号：US10389315
申请日：2003-03-13
申请人： Joseph Serge Limoges , Robert A. Begg , Dominique J. Evans , William T. O'Connell , Klaus Bernhard Schiefer , Timothy J. Vincent
发明人： Joseph Serge Limoges , Robert A. Begg , Dominique J. Evans , William T. O'Connell , Klaus Bernhard Schiefer , Timothy J. Vincent
IPC分类号： G06F17/30
CPC分类号： G06F17/30404 , Y10S707/99932
摘要： A method, computer program product and computing device for promoting reuse of previously generated access plans are disclosed. SQL statements containing literals are amended so as to substitute a parameter marker for each literal. Amended statements are provided to the DBMS along with parameters including the substituted literals and a substitution indicator indicating that the substitution has been performed. The DBMS assesses the soundness of the substitutions that are performed. Soundness may be measured in terms of the semantic correctness of the amended statement and the likelihood that the literal substitution will improve DBMS efficiency. If a substitution is unsound, the DBMS may obtain and optimize the original version of the amended SQL statement. Otherwise, the amended statement is optimized. Advantageously, SQL statements originally differing only in the value of one or more literals may become functionally equivalent, and the reuse of cached, previously generated access plans is thus promoted.
摘要翻译：公开了一种用于促进先前生成的访问计划的重用的方法，计算机程序产品和计算设备。修改包含文字的SQL语句，以替换每个文字的参数标记。将修改后的语句与包括替代文字的参数以及指示已执行替换的替换指示符一起提供给DBMS。 DBMS评估所进行替换的健全性。可以根据经修改的语句的语义正确性以及字面替代可以提高DBMS效率的可能性来衡量声音。如果替换不正确，DBMS可能会获得并优化修改后的SQL语句的原始版本。否则，修改后的声明进行了优化。有利地，最初仅在一个或多个文字的值上不同的SQL语句可能在功能上是等效的，因此促进了先前生成的缓存的访问计划的重用。

2. 发明授权

US07076489B2 System and method for enabling efficient multi-protocol database transaction processing 有权
标题翻译：用于实现高效多协议数据库事务处理的系统和方法
公开(公告)号：US07076489B2
公开(公告)日：2006-07-11
申请号：US10390062
申请日：2003-03-14
申请人： Robert A. Begg , Jo-Anne M. Kirton , Timothy J. Vincent
发明人： Robert A. Begg , Jo-Anne M. Kirton , Timothy J. Vincent
IPC分类号： G06F17/30
CPC分类号： G06F17/30557
摘要： A system provides efficient multi-protocol database transaction processing in a multi-communications protocol and multi-programming model computing environment. The system separates the source and the target functionalities, and uses generic function names linked to function pointers, in order to permit the source layer to call embedded functions in the target layer. As an example, the system provides a source layer code path that includes embedded call-back functions and embedded generic function names. A target layer code path is set to include embedded functions and generic call-back function names. A function pointer array permits the source layer code path to call functions embedded in the target layer code path using the generic function names. A call-back function pointer array permits the target layer code path to call the call-back functions embedded in the source layer code path using the generic call-back function names.
摘要翻译：系统在多通信协议和多编程模型计算环境中提供有效的多协议数据库事务处理。系统分离源和目标功能，并使用链接到函数指针的通用函数名，以便允许源层调用目标层中的嵌入式函数。作为示例，系统提供包括嵌入式回调函数和嵌入式通用函数名称的源层代码路径。目标层代码路径被设置为包括嵌入式函数和通用回调函数名称。函数指针数组允许源层代码路径使用通用函数名调用嵌入在目标层代码路径中的函数。回调函数指针数组允许目标层代码路径使用通用回调函数名称来调用嵌入在源层代码路径中的回调函数。

3. 发明授权

US07039651B2 System and method for executing a large object fetch query against a database 有权
标题翻译：用于针对数据库执行大型对象提取查询的系统和方法
公开(公告)号：US07039651B2
公开(公告)日：2006-05-02
申请号：US10425851
申请日：2003-04-29
申请人： Curt L. Cotner , Robert A. Begg , Brent P. Gross , Paul A. Ostler , Timothy J. Vincent
发明人： Curt L. Cotner , Robert A. Begg , Brent P. Gross , Paul A. Ostler , Timothy J. Vincent
IPC分类号： G06F17/30
CPC分类号： G06F17/30318 , Y10S707/99944 , Y10S707/99946
摘要： A database server helps to streamline the retrieval of LOB values by deciding to send a locator in replacement of the LOB value, or the LOB value itself, depending upon the specific LOB value being retrieved. A threshold value is determined in a fetch query, and the LOB sizes below that threshold are sent as values in a corresponding fetch response, and the lengths above are sent as locators in the fetch response. Indicators are inserted in a fetch parameter of the response to inform the receiving client the form of retrieval that was used for each requested LOB value being returned.
摘要翻译：数据库服务器有助于通过根据正在检索的特定LOB值决定发送定位器替换LOB值或LOB值本身来简化LOB值的检索。在获取查询中确定阈值，并且低于该阈值的LOB大小作为相应获取响应中的值发送，并且上述长度作为定位器发送在获取响应中。指示符插入到响应的提取参数中，以通知接收客户端返回的每个请求的LOB值所使用的检索形式。

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