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1. 发明申请

US20070299834A1 Techniques of rewriting descendant and wildcard XPath using combination of SQL OR, UNION ALL, and XMLConcat() construct 有权
标题翻译：使用SQL OR，UNION ALL和XMLConcat（）构造的组合重写后代和通配符XPath的技术
公开(公告)号：US20070299834A1
公开(公告)日：2007-12-27
申请号：US11474038
申请日：2006-06-23
申请人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Anand Manikutty , James W. Warner , Vikas Arora , Susan Kotsovolos
发明人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Anand Manikutty , James W. Warner , Vikas Arora , Susan Kotsovolos
IPC分类号： G06F17/30
CPC分类号： G06F17/30935
摘要： A method for processing queries is provided. A first representation of a query is generated, where the query includes a certain operator that is to be performed based on an XPath expression that is expandable into multiple location paths. The first representation of the query is rewritten into a second representation that corresponds to an equivalent query, where rewriting the first representation includes expanding the XPath expression into the plurality of location paths and, based on the certain operator, including a plurality of operators in the second representation, where the plurality of operators include: a first set of operators that is to be performed based on each of the plurality of location paths, and a second set of operators that is to be performed based on data returned from at least one operator included in the first set of operators. The query may thereafter be executed based on the second representation. The second representation may be further rewritten to third representation depending on the physical storage of XML.
摘要翻译：提供了一种处理查询的方法。生成查询的第一个表示形式，其中查询包含一个基于可扩展到多个位置路径的XPath表达式执行的某个运算符。查询的第一表示被重写成对应于等效查询的第二表示，其中重写第一表示包括将XPath表达式扩展到多个位置路径中，并且基于特定运算符，包括多个运算符第二表示，其中所述多个运算符包括：将基于所述多个位置路径中的每一个来执行的第一组运算符，以及将基于从至少一个运算符返回的数据来执行的第二组运算符包含在第一组运算符中。此后可以基于第二表示来执行查询。取决于XML的物理存储，第二表示可以进一步重写为第三表示。

2. 发明授权

US07730080B2 Techniques of rewriting descendant and wildcard XPath using one or more of SQL OR, UNION ALL, and XMLConcat() construct 有权
标题翻译：使用SQL OR，UNION ALL和XMLConcat（）构造中的一个或多个重写后代和通配符XPath的技术
公开(公告)号：US07730080B2
公开(公告)日：2010-06-01
申请号：US11474038
申请日：2006-06-23
申请人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Anand Manikutty , James W. Warner , Vikas Arora , Susan Kotsovolos
发明人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Anand Manikutty , James W. Warner , Vikas Arora , Susan Kotsovolos
IPC分类号： G06F7/00 , G06F17/30
CPC分类号： G06F17/30935
摘要： A method for processing queries is provided. A first representation of a query is generated, where the query includes a certain operator that is to be performed based on an XPath expression that is expandable into multiple location paths. The first representation of the query is rewritten into a second representation that corresponds to an equivalent query, where rewriting the first representation includes expanding the XPath expression into the plurality of location paths and, based on the certain operator, including a plurality of operators in the second representation, where the plurality of operators include: a first set of operators that is to be performed based on each of the plurality of location paths, and a second set of operators that is to be performed based on data returned from at least one operator included in the first set of operators. The query may thereafter be executed based on the second representation. The second representation may be further rewritten to third representation depending on the physical storage of XML.
摘要翻译：提供了一种处理查询的方法。生成查询的第一个表示形式，其中查询包含一个基于可扩展到多个位置路径的XPath表达式执行的某个运算符。查询的第一表示被重写成对应于等效查询的第二表示，其中重写第一表示包括将XPath表达式扩展到多个位置路径中，并且基于特定运算符，包括多个运算符第二表示，其中所述多个运算符包括：将基于所述多个位置路径中的每一个来执行的第一组运算符，以及将基于从至少一个运算符返回的数据来执行的第二组运算符包含在第一组运算符中。此后可以基于第二表示来执行查询。取决于XML的物理存储，第二表示可以进一步重写为第三表示。

3. 发明授权

US07739219B2 Techniques of optimizing queries using NULL expression analysis 有权
标题翻译：使用NULL表达式分析优化查询的技术
公开(公告)号：US07739219B2
公开(公告)日：2010-06-15
申请号：US11517969
申请日：2006-09-08
申请人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Anand Manikutty , James W. Warner , Vikas Arora , Susan Kotsovolos
发明人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Anand Manikutty , James W. Warner , Vikas Arora , Susan Kotsovolos
IPC分类号： G06F17/30
CPC分类号： G06F17/30454
摘要： A method for optimizing queries is described. A query, which includes a first expression for determining whether each of a set of values evaluates to NULL or NOT NULL, is received. At compile-time, a first representation of the query is generated, where the first representation indicates that the query is to be performed based on the first expression. Based on the first expression, a second expression is determined. The second expression is such that the first expression would evaluate to any NOT NULL value if and only if the second expression would evaluate to any NOT NULL value. The second expression, when evaluated, is much more computationally efficient compared with the evaluation of the first expression. Based on the first representation, a second representation of the query is generated, where the second representation indicates that the query is to be performed based on the second expression. Thereafter, the query is executed based on the second representation.
摘要翻译：描述用于优化查询的方法。一个查询，其中包含一个第一表达式，用于确定一组值中的每一个是否计算为NULL或NOT NULL。在编译时，生成查询的第一个表示，其中第一个表示指示要根据第一个表达式执行查询。基于第一个表达式，确定第二个表达式。第二个表达式使得当且仅当第二个表达式计算为任何NOT NULL值时，第一个表达式将求值为任何NOT NULL值。第二个表达式与评估第一个表达式相比，计算效率要高得多。基于第一表示，生成查询的第二表示，其中第二表示指示将基于第二表达式执行查询。此后，基于第二表示执行查询。

4. 发明申请

US20080065674A1 Techniques of optimizing queries using NULL expression analysis 有权
标题翻译：使用NULL表达式分析优化查询的技术
公开(公告)号：US20080065674A1
公开(公告)日：2008-03-13
申请号：US11517969
申请日：2006-09-08
申请人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Anand Manikutty , James W. Warner , Vikas Arora , Susan Kotsovolos
发明人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Anand Manikutty , James W. Warner , Vikas Arora , Susan Kotsovolos
IPC分类号： G06F17/00
CPC分类号： G06F17/30454
摘要： A method for optimizing queries is described. A query, which includes a first expression for determining whether each of a set of values evaluates to NULL or NOT NULL, is received. At compile-time, a first representation of the query is generated, where the first representation indicates that the query is to be performed based on the first expression. Based on the first expression, a second expression is determined. The second expression is such that the first expression would evaluate to any NOT NULL value if and only if the second expression would evaluate to any NOT NULL value. The second expression, when evaluated, is much more computationally efficient compared with the evaluation of the first expression. Based on the first representation, a second representation of the query is generated, where the second representation indicates that the query is to be performed based on the second expression. Thereafter, the query is executed based on the second representation.
摘要翻译：描述用于优化查询的方法。一个查询，其中包含一个第一表达式，用于确定一组值中的每一个是否计算为NULL或NOT NULL。在编译时，生成查询的第一个表示，其中第一个表示指示要根据第一个表达式执行查询。基于第一个表达式，确定第二个表达式。第二个表达式使得当且仅当第二个表达式计算为任何NOT NULL值时，第一个表达式将求值为任何NOT NULL值。第二个表达式与评估第一个表达式相比，计算效率要高得多。基于第一表示，生成查询的第二表示，其中第二表示指示将基于第二表达式执行查询。此后，基于第二表示执行查询。

5. 发明授权

US07644066B2 Techniques of efficient XML meta-data query using XML table index 有权
标题翻译：使用XML表索引的高效XML元数据查询技术
公开(公告)号：US07644066B2
公开(公告)日：2010-01-05
申请号：US11394878
申请日：2006-03-31
申请人： Muralidhar Krishnaprasad , Zhen Hua Liu , Hui Joe Chang , Vikas Arora , Susan M. Kotsovolos
发明人： Muralidhar Krishnaprasad , Zhen Hua Liu , Hui Joe Chang , Vikas Arora , Susan M. Kotsovolos
IPC分类号： G06F17/30
CPC分类号： G06F17/30911 , Y10S707/99933
摘要： XML table indexes provide a more efficient mechanism for searching data stored in aggregate form. XML table indexes are a set of tables created to project out in column form commonly sought metadata from stored XML documents. By projecting the data includes into column form, queries on the XML documents can be efficiently processed as they can leverage the enhanced functionality provided by the database tables. The XML table indexes may use aliases, partitioning, constraints and other functions to further improve query flexibility and performance.
摘要翻译： XML表索引为搜索以聚合形式存储的数据提供了更有效的机制。 XML表索引是一组创建的表格，通常以存储的XML文档寻求元数据的形式进行投射。通过将数据包括到列形式中，可以有效地处理关于XML文档的查询，因为它们可以利用数据库表提供的增强功能。 XML表索引可以使用别名，分区，约束和其他功能来进一步提高查询的灵活性和性能。

6. 发明授权

US09436779B2 Techniques of efficient XML query using combination of XML table index and path/value index 有权
标题翻译：使用XML表索引和路径/值索引的组合的高效XML查询技术
公开(公告)号：US09436779B2
公开(公告)日：2016-09-06
申请号：US11601146
申请日：2006-11-17
申请人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Vikas Arora
发明人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Vikas Arora
IPC分类号： G06F17/30
CPC分类号： G06F17/30917 , G06F17/30463 , G06F17/30911
摘要： A mechanism is provided for accessing XML data in a database system using a combination of a XML Table Index table and a XML Path Index table. By using a combination of a XML Table Index and a XML Path Index, both selection access and navigational access involved in a query can be optimized. For example, the XML Table Index gives the database system an ability to readily evaluate the predicate expression, thereby improving the selection access. Moreover, in some embodiments, the selection access can be further improved by using secondary indexes on columns contained in the XML Table Index table. In a complementary manner, the XML Path Index table gives the database system an ability to navigate to a specific location given a path expression, thereby improving the navigational access. Thus, by combining both tables, both selection and navigational accesses are improved.
摘要翻译：提供了一种机制，用于使用XML表索引表和XML路径索引表的组合来访问数据库系统中的XML数据。通过使用XML表索引和XML路径索引的组合，可以优化查询中涉及的选择访问和导航访问。例如，XML表索引使数据库系统能够容易地评估谓词表达式，从而改善选择访问。此外，在一些实施例中，可以通过在XML表索引表中包含的列上使用辅助索引来进一步改进选择访问。以互补的方式，XML路径索引表给数据库系统一个导航到指定路径表达式的特定位置的能力，从而改善导航访问。因此，通过组合两个表，提高了选择和导航访问。

7. 发明申请

US20080120322A1 Techniques of efficient query over text, image, audio, video and other domain specific data in XML using XML table index with integration of text index and other domain specific indexes 有权
标题翻译：使用XML表索引对文本，图像，音频，视频和XML中的其他域特定数据进行高效查询的技术，整合文本索引和其他域特定索引
公开(公告)号：US20080120322A1
公开(公告)日：2008-05-22
申请号：US11601147
申请日：2006-11-17
申请人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Vikas Arora
发明人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Vikas Arora
IPC分类号： G06F17/30
CPC分类号： G06F17/30911 , G06F17/30929
摘要： Commonly searched nodes of complex data types contained in a collection of XML documents can be projected to, and their values can be stored in, corresponding columns in XML Table Index tables in a database system. In one embodiment, those columns stores logical pointers, rather than raw values, of the complex data types. Domain indexes are further provided to index at least one of the columns of complex data types in XML Table Indexes. The inclusion of complex data types and domain indexes provide a more efficient mechanism for searching domain specific data, such as audio, video, text stored in the collection of XML documents. Query optimizer logic of the database system can prepare one or more query execution plans for a submitted query including a plan that leverages XML Table Indexes and domain indexes and select a query execution plan based on cost information.
摘要翻译：可以将包含在XML文档集合中的复杂数据类型的常见搜索节点投影到其数据库系统中的XML表索引表中的相应列中，并将其值存储在相应的列中。在一个实施例中，这些列存储复杂数据类型的逻辑指针而不是原始值。进一步提供域索引以索引XML表索引中复杂数据类型的列中的至少一列。包含复杂数据类型和域索引提供了一种更有效的机制，用于搜索存储在XML文档集合中的域特定数据，例如音频，视频，文本。数据库系统的查询优化器逻辑可以为提交的查询准备一个或多个查询执行计划，包括利用XML表索引和域索引的计划，并根据成本信息选择查询执行计划。

8. 发明授权

US08478760B2 Techniques of efficient query over text, image, audio, video and other domain specific data in XML using XML table index with integration of text index and other domain specific indexes 有权
标题翻译：使用XML表索引对文本，图像，音频，视频和XML中的其他域特定数据进行高效查询的技术，整合文本索引和其他域特定索引
公开(公告)号：US08478760B2
公开(公告)日：2013-07-02
申请号：US11601147
申请日：2006-11-17
申请人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Vikas Arora
发明人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Vikas Arora
IPC分类号： G06F17/30
CPC分类号： G06F17/30911 , G06F17/30929
摘要： Commonly searched nodes of complex data types contained in a collection of XML documents can be projected to, and their values can be stored in, corresponding columns in XML Table Index tables in a database system. In one embodiment, those columns stores logical pointers, rather than raw values, of the complex data types. Domain indexes are further provided to index at least one of the columns of complex data types in XML Table Indexes. The inclusion of complex data types and domain indexes provide a more efficient mechanism for searching domain specific data, such as audio, video, text stored in the collection of XML documents. Query optimizer logic of the database system can prepare one or more query execution plans for a submitted query including a plan that leverages XML Table Indexes and domain indexes and select a query execution plan based on cost information.
摘要翻译：可以将包含在XML文档集合中的复杂数据类型的常见搜索节点投影到其数据库系统中的XML表索引表中的相应列中，并将其值存储在相应的列中。在一个实施例中，这些列存储复杂数据类型的逻辑指针而不是原始值。进一步提供域索引以索引XML表索引中复杂数据类型的列中的至少一列。包含复杂数据类型和域索引提供了一种更有效的机制，用于搜索存储在XML文档集合中的域特定数据，例如音频，视频，文本。数据库系统的查询优化器逻辑可以为提交的查询准备一个或多个查询执行计划，包括利用XML表索引和域索引的计划，并根据成本信息选择查询执行计划。

9. 发明申请

US20080120321A1 Techniques of efficient XML query using combination of XML table index and path/value index 有权
标题翻译：使用XML表索引和路径/值索引的组合的高效XML查询技术
公开(公告)号：US20080120321A1
公开(公告)日：2008-05-22
申请号：US11601146
申请日：2006-11-17
申请人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Vikas Arora
发明人： Zhen Hua Liu , Muralidhar Krishnaprasad , Hui Joe Chang , Vikas Arora
IPC分类号： G06F17/30
CPC分类号： G06F17/30917 , G06F17/30463 , G06F17/30911
摘要： A mechanism is provided for accessing XML data in a database system using a combination of a XML Table Index table and a XML Path Index table. By using a combination of a XML Table Index and a XML Path Index, both selection access and navigational access involved in a query can be optimized. For example, the XML Table Index gives the database system an ability to readily evaluate the predicate expression, thereby improving the selection access. Moreover, in some embodiments, the selection access can be further improved by using secondary indexes on columns contained in the XML Table Index table. In a complementary manner, the XML Path Index table gives the database system an ability to navigate to a specific location given a path expression, thereby improving the navigational access. Thus, by combining both tables, both selection and navigational accesses are improved.
摘要翻译：提供了一种机制，用于使用XML表索引表和XML路径索引表的组合来访问数据库系统中的XML数据。通过使用XML表索引和XML路径索引的组合，可以优化查询中涉及的选择访问和导航访问。例如，XML表索引使数据库系统能够容易地评估谓词表达式，从而改善选择访问。此外，在一些实施例中，可以通过在XML表索引表中包含的列上使用辅助索引来进一步改进选择访问。以互补的方式，XML路径索引表给数据库系统一个导航到指定路径表达式的特定位置的能力，从而改善导航访问。因此，通过组合两个表，提高了选择和导航访问。

10. 发明授权

US07870121B2 Matching up XML query expression for XML table index lookup during query rewrite 有权
标题翻译：在查询重写期间匹配XML表索引查找的XML查询表达式
公开(公告)号：US07870121B2
公开(公告)日：2011-01-11
申请号：US12014238
申请日：2008-01-15
申请人： Hui Joe Chang , Zhen Hua Liu , Vikas Arora
发明人： Hui Joe Chang , Zhen Hua Liu , Vikas Arora
IPC分类号： G06F17/30
CPC分类号： G06F17/30935
摘要： Techniques are provided for determining whether an XML table index may be used when executing an XML query. An XML table index is defined with a row pattern expression and one or more column pattern expressions. In one technique, an index expression is generated for each row pattern expression-column pattern expression combination. An expression included in the XML query (“query expression”) is compared against one or more of the index expressions. In another technique, even if a query expression does not exactly match a row pattern expression, it is determined whether the query expression is equivalent to the row pattern expression. In another technique, even if a query expression does not exactly match and a row pattern expression, it is determined whether the query expression is “contained by” the row pattern expression.
摘要翻译：提供了用于确定在执行XML查询时是否可以使用XML表索引的技术。使用行模式表达式和一个或多个列模式表达式定义XML表索引。在一种技术中，为每个行模式表达式 - 列模式表达式组合生成索引表达式。包含在XML查询（“查询表达式”）中的表达式与一个或多个索引表达式进行比较。在另一种技术中，即使查询表达式与行模式表达式不完全匹配，则确定查询表达式是否等同于行模式表达式。在另一种技术中，即使查询表达式与行模式表达式不完全匹配，则确定查询表达式是否由行模式表达式“包含”。

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