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1.发明申请公开(公告)号：US20100036803A1
公开(公告)日：2010-02-11
申请号：US12326822
申请日：2008-12-02
CPC分类号： G06F17/3051
摘要： Techniques are disclosed for creating and using a filter index in order to identify registered queries whose result sets are likely to have been changed by changes made to tables. The filter index entries are based on filter conditions. The filter conditions are created based on predicates contained in the registered queries. The filter conditions may include exclusive predicates and join predicates. Join predicates that join a table T1 with a table T2 may be instantiated by replacing references to table T2 with values extracted from table T2. Various techniques are described for recognizing situations in which a query can be included in, or excluded from, the set of likely-changed queries, without fully evaluating the filter conditions that correspond to the queries.
摘要翻译： 公开了用于创建和使用过滤器索引的技术，以便识别其结果集可能由于对表的改变而改变的注册查询。 过滤器索引条目基于过滤器条件。 过滤条件是根据注册查询中包含的谓词创建的。 过滤条件可能包括排除谓词和连接谓词。 可以通过用从表T2提取的值替换对表T2的引用来实例化加入具有表T2的表T1的连接谓词。 描述各种技术用于识别其中可以将查询包括在可能改变的查询集合中或从可能改变的查询集合中排除的情况，而不完全评估与查询相对应的过滤条件。
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2.发明授权Adaptive filter index for determining queries affected by a DML operation 有权用于确定受DML操作影响的查询的自适应过滤器索引公开(公告)号：US08185508B2
公开(公告)日：2012-05-22
申请号：US12326822
申请日：2008-12-02
IPC分类号： G06F17/30
CPC分类号： G06F17/3051
摘要： Techniques are disclosed for creating and using a filter index in order to identify registered queries whose result sets are likely to have been changed by changes made to tables. The filter index entries are based on filter conditions. The filter conditions are created based on predicates contained in the registered queries. The filter conditions may include exclusive predicates and join predicates. Join predicates that join a table T1 with a table T2 may be instantiated by replacing references to table T2 with values extracted from table T2. Various techniques are described for recognizing situations in which a query can be included in, or excluded from, the set of likely-changed queries, without fully evaluating the filter conditions that correspond to the queries.
摘要翻译： 公开了用于创建和使用过滤器索引的技术，以便识别其结果集可能由于对表的改变而改变的注册查询。 过滤器索引条目基于过滤器条件。 过滤条件是根据注册查询中包含的谓词创建的。 过滤条件可能包括排除谓词和连接谓词。 可以通过用从表T2提取的值替换对表T2的引用来实例化加入具有表T2的表T1的连接谓词。 描述各种技术用于识别其中可以将查询包括在可能改变的查询集合中或从可能改变的查询集合中排除的情况，而不完全评估与查询相对应的过滤条件。
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公开(公告)号：US08037040B2
公开(公告)日：2011-10-11
申请号：US12189078
申请日：2008-08-08
IPC分类号： G06F17/30
CPC分类号： G06F17/30516
摘要： Techniques are described to allow a query to be registered as a persistent stored entity within the database, and to generate notifications as and when the query result changes continuously as long as the query continues to be registered with the database. According to one aspect, for a table referenced in a query, a filter condition is generated based, at least in part, on a predicate of the query. Then, the database server determines whether the filter condition is satisfied by either a before image of a row, or an after image of the row, that was modified by a transaction. If the filter condition is satisfied by either the before image or the after image, then the query is added to a first set of queries whose result sets may have been affected by the transaction. From among the first set of queries, a second set of queries that have result sets that were actually affected by the transaction is determined. Notifications are then sent based on the second set of queries.
摘要翻译： 描述技术来允许将查询注册为数据库内的持久存储实体，并且只要查询继续向数据库注册，就可以随着查询结果不断更改而生成通知。 根据一个方面，对于在查询中引用的表，基于至少部分地基于查询的谓词生成过滤条件。 然后，数据库服务器通过由事务修改的行的先前图像或行的后续图像来确定滤波器条件是否满足。 如果过滤条件由前图像或后图像所满足，则将查询添加到其结果集可能受事务影响的第一组查询中。 从第一组查询中，确定具有实际受事务影响的结果集的第二组查询。 然后基于第二组查询发送通知。
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公开(公告)号：US20100036831A1
公开(公告)日：2010-02-11
申请号：US12189078
申请日：2008-08-08
IPC分类号： G06F17/30
CPC分类号： G06F17/30516
摘要： Techniques are described to allow a query to be registered as a persistent stored entity within the database, and to generate notifications as and when the query result changes continuously as long as the query continues to be registered with the database. According to one aspect, for a table referenced in a query, a filter condition is generated based, at least in part, on a predicate of the query. Then, the database server determines whether the filter condition is satisfied by either a before image of a row, or an after image of the row, that was modified by a transaction. If the filter condition is satisfied by either the before image or the after image, then the query is added to a first set of queries whose result sets may have been affected by the transaction. From among the first set of queries, a second set of queries that have result sets that were actually affected by the transaction is determined. Notifications are then sent based on the second set of queries.
摘要翻译： 描述技术来允许将查询注册为数据库内的持久存储实体，并且只要查询继续向数据库注册，就可以随着查询结果不断更改而生成通知。 根据一个方面，对于在查询中引用的表，基于至少部分地基于查询的谓词生成过滤条件。 然后，数据库服务器通过由事务修改的行的先前图像或行的后续图像来确定滤波器条件是否满足。 如果过滤条件由前图像或后图像所满足，则将查询添加到其结果集可能受事务影响的第一组查询中。 从第一组查询中，确定具有实际受事务影响的结果集的第二组查询。 然后基于第二组查询发送通知。
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公开(公告)号：US10296629B2
公开(公告)日：2019-05-21
申请号：US11876679
申请日：2007-10-22
申请人： Lakshminarayanan Chidambaran , Mehul Dilip Bastawala , Srinath Krishnaswamy , Tirthankar Lahiri , Juan R. Loaiza , Bipul Sinha , Srinivas S. Vemuri
发明人： Lakshminarayanan Chidambaran , Mehul Dilip Bastawala , Srinath Krishnaswamy , Tirthankar Lahiri , Juan R. Loaiza , Bipul Sinha , Srinivas S. Vemuri
摘要： A method, system, and computer program product is disclosed for interacting with a client supported by a client-side cache. Embodiments of a method, a system, and a computer program product are disclosed that retrieve a first snapshot, indicating a state of the database after a last database request by the client, associated with the client, determine any number of invalid cached results for the client based on the first snapshot, and transmit the any number of invalid cached results and a second snapshot, an update for the first snapshot.
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公开(公告)号：US09697253B2
公开(公告)日：2017-07-04
申请号：US11875782
申请日：2007-10-19
申请人： Lakshminarayanan Chidambaran , Mehul Dilip Bastawala , Srinath Krishnaswamy , Tirthankar Lahiri , Juan R. Loaiza , Bipul Sinha , Srinivas S. Vemuri
发明人： Lakshminarayanan Chidambaran , Mehul Dilip Bastawala , Srinath Krishnaswamy , Tirthankar Lahiri , Juan R. Loaiza , Bipul Sinha , Srinivas S. Vemuri
IPC分类号： G06F17/30
CPC分类号： G06F17/3048
摘要： A method, system, and computer program product is disclosed for caching results in a client-side cache. Embodiments of a method, a system, and a computer program product are disclosed that associate a first snapshot of a database with a client that indicates a state of the database after a last database request by the client, and indicate any number of invalid cached results in the client cache for the client based upon the first snapshot. In some embodiments, the method further includes receiving a second snapshot that indicates a state of the database upon receipt of a database server request by the client, and updating the first snapshot with the second snapshot.
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7.发明授权公开(公告)号：US09400812B2
公开(公告)日：2016-07-26
申请号：US13209224
申请日：2011-08-12
申请人： Bipul Sinha , Vivekanandhan Raja , Amit Ganesh
发明人： Bipul Sinha , Vivekanandhan Raja , Amit Ganesh
CPC分类号： G06F17/30309
摘要： Disclosed is a mechanism, system, interface, and process to determine one or more life intervals when given a key. In addition, one or more life intervals can be determined for each key within a range of keys. This type of process is useful for auditing purposes or if it is desire to implement a query upon past versions when a key or range of keys is specified for the data for which past versions is desired. This facilitates algorithms, mechanisms, and processes to implement a query upon past versions.
摘要翻译： 公开了一种在给予键时确定一个或多个生命周期的机制，系统，界面和过程。 另外，可以在一系列键内为每个键确定一个或多个生命周期。 这种类型的过程对于审计目的是有用的，或者如果希望在为期望的过去版本的数据指定密钥或密钥范围时希望在过去的版本上实现查询。 这有助于算法，机制和过程来实现过去版本的查询。
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8.发明授权Apparatus to selectively remove the effects of transactions in online database and enable logical recovery 有权用于选择性地消除在线数据库中事务的影响并启用逻辑恢复的装置公开(公告)号：US07873605B2
公开(公告)日：2011-01-18
申请号：US11699689
申请日：2007-01-29
申请人： Manosiz Bhattacharyya , Bipul Sinha , Amit Ganesh
发明人： Manosiz Bhattacharyya , Bipul Sinha , Amit Ganesh
CPC分类号： G06F17/30377
摘要： A method and apparatus for selective removal of user data changes is provided. In one embodiment, the methodology is implemented by a logical recovery mechanism. Upon receiving a request to selectively remove user data changes stored in a database, the mechanism creates an empty set of transactions to be populated for selective removal, identifies one or more transactions and places them in the causal set of transactions. The mechanism further identifies other transactions that logically depend on any transaction already in the causal set of transactions. Finally, either while the causal set of transactions is being identified or after the identification is completed, the mechanism also determines user data changes made by the causal set of transactions. One or more compensating transactions may be generated by the logical recovery mechanism, which when executed, reverse the user data changes.
摘要翻译： 提供了用于选择性地去除用户数据变化的方法和装置。 在一个实施例中，该方法由逻辑恢复机制来实现。 在接收到选择性地删除存储在数据库中的用户数据改变的请求时，该机制创建要填充的空的一组事务以进行选择性删除，识别一个或多个事务并将它们放置在因果集合中。 该机制进一步识别逻辑上依赖于因果交易集合中的任何交易的其他交易。 最后，既然确定了交易的因果集合，或者在识别完成之后，该机制还确定了因果集交易所做的用户数据更改。 一个或多个补偿事务可以由逻辑恢复机制产生，逻辑恢复机制在执行时反转用户数据改变。
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9.发明授权Method and apparatus for accessing data as it existed at a previous point in time 有权用于访问在先前时间点存在的数据的方法和装置公开(公告)号：US06983286B1
公开(公告)日：2006-01-03
申请号：US10325211
申请日：2002-12-18
申请人： Bipul Sinha , Namit Jain , Amit Ganesh , Archna Kalra Johnson , Srinivas Vemuri
发明人： Bipul Sinha , Namit Jain , Amit Ganesh , Archna Kalra Johnson , Srinivas Vemuri
IPC分类号： G06F17/30
CPC分类号： G06F17/30551 , Y10S707/99943
摘要： Techniques are provided for sharing of flashback cursors by adding a time domain property to flashback cursors. This time domain property defines the range of flashback times for which the flashback cursor is valid. According to one embodiment, this “validity range” is closed at the lower bound and open at the upper bound. A subsequent flashback query can share an existing flashback cursor if the flashback time of the subsequent flashback query falls within the validity range of the existing flashback cursor. In one embodiment, the validity range of a flashback cursor is established based on times associated with indexes used to process the flashback query for which the flashback cursor was made. Consequently, an existing flashback cursor is less likely to be used by a subsequent flashback query when it would be inefficient to do so.
摘要翻译： 提供了通过向闪回光标添加时域属性来共享闪回光标的技术。 此时域属性定义闪回光标有效的闪回时间范围。 根据一个实施例，该“有效范围”在下限处封闭并在上限处打开。 如果后续闪回查询的闪回时间落在现有闪回游标的有效范围内，后续闪回查询可以共享现有闪回游标。 在一个实施例中，闪回光标的有效范围基于与用于处理闪回光标的闪回查询的索引相关联的时间来建立。 因此，当这样做的效率低下时，现有的闪回游标不太可能被随后的闪回查询使用。
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10.发明申请公开(公告)号：US20050120064A1
公开(公告)日：2005-06-02
申请号：US10933828
申请日：2004-09-03
申请人： Bipul Sinha , Vivekanandhan Raja , Amit Ganesh
发明人： Bipul Sinha , Vivekanandhan Raja , Amit Ganesh
CPC分类号： G06F17/30309
摘要： Disclosed is a mechanism, system, interface, and process to determine one or more life intervals when given a key. In addition, one or more life intervals can be determined for each key within a range of keys. This type of process is useful for auditing purposes or if it is desire to implement a query upon past versions when a key or range of keys is specified for the data for which past versions is desired. This facilitates algorithms, mechanisms, and processes to implement a query upon past versions.
摘要翻译： 公开了一种在给予键时确定一个或多个生命周期的机制，系统，界面和过程。 另外，可以在一系列键内为每个键确定一个或多个生命周期。 这种类型的过程对于审计目的是有用的，或者如果希望在为期望的过去版本的数据指定密钥或密钥范围时希望在过去的版本上实现查询。 这有助于算法，机制和过程来实现过去版本的查询。
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