摘要:
System, method, and program product for managing transactions on a plurality of Database Management Systems residing on separate participant servers and a coordinator server. A single transaction proceeds by multiple steps across more then one of the plurality of Database Management Systems as participants. Savepoints are assigned to the participants across the Database Management System, with at least one savepoint within a multiple step transaction. The DBMS responds to application requests to rollback to savepoint by rolling back the transaction, across the Database Management System participants, to the savepoint Further disclosed is a program product that contains code, which, either as written on the medium, or as instantiated in RAM, or both, controls the operation of a distributed database management system.
摘要:
A method for establishing a connection between a data server and a middleware server is disclosed. The method includes defining a plurality of trust attributes corresponding to a trusted context between the middleware server and the data server and validating the plurality of trust attributes against a plurality of attributes corresponding to the middleware server. The plurality of attributes provided in a connection request. The method also includes establishing the trusted context based on the validating the plurality of trust attributes.
摘要:
A method and system for providing package resolution in a database system is disclosed. The method and system comprise providing a statement within a server which allows an application to identify a list of package collections. The method and system further includes executing the statement to obtain the appropriate package. A system and method in accordance with the present invention provides a new current package path value, which is set via a statement referred to as Set Current Package Path. The SET CURRENT PACKAGE PATH statement allows the application to supply a precedence list of qualified package collections during execution time, therefore the scheme for resolving packages can be changed at any point during execution. The SET CURRENT PACKAGE PATH statement improves application development by making the package resolution mechanism less error prone and less tedious for the application developer, while providing an optimal-performance solution in the client-server environment.
摘要翻译:公开了一种在数据库系统中提供打包分辨率的方法和系统。 方法和系统包括在服务器内提供允许应用程序识别包集合列表的语句。 该方法和系统还包括执行该语句以获得适当的包。 根据本发明的系统和方法提供新的当前包路径值,其通过称为设置当前包路径的语句来设置。 SET CURRENT PACKAGE PATH语句允许应用程序在执行时间内提供合格的包集合的优先列表,因此可以在执行期间的任何时候更改解决包的方案。 SET CURRENT PACKAGE PATH语句通过使程序包解析机制对于应用程序开发人员而言更不容易出错,更乏味,同时在客户端 - 服务器环境中提供最佳性能解决方案,从而改进了应用程序开发。
摘要:
A system for establishing a connection between a data server and a middleware server is disclosed. The system includes defining a plurality of trust attributes corresponding to a trusted context between the middleware server and the data server and validating the plurality of trust attributes against a plurality of attributes corresponding to the middleware server. The plurality of attributes provided in a connection request. The system also includes establishing the trusted context based on the validating the plurality of trust attributes.
摘要:
In a system for avoiding section collision for application server requests over a single database connection, the database server assigns query identifiers to each instance of the same cursor opened for the same processing level within an application, allowing multiple instances of the same cursor to be processed in parallel without section collision. The application server assigns a command source identifier to each statement sent over a single database connection to uniquely identify the application source of the statement. This applies for multiples of the same statement sent by different application sources within the same application, for a single statement containing multiple application sources, and for multiple statements from different applications multiplexed over a single database connection. These statements can be processed separately from and in parallel with the each other without section collision.
摘要:
In a system for avoiding section collision for application server requests over a single database connection, the database server assigns query identifiers to each instance of the same cursor opened for the same processing level within an application, allowing multiple instances of the same cursor to be processed in parallel without section collision. The application server assigns a command source identifier to each statement sent over a single database connection to uniquely identify the application source of the statement. This applies for multiples of the same statement sent by different application sources within the same application, for a single statement containing multiple application sources, and for multiple statements from different applications multiplexed over a single database connection. These statements can be processed separately from and in parallel with the each other without section collision.
摘要:
In a method for avoiding section collision for application server requests over a single database connection, the database server assigns query identifiers to each instance of the same cursor opened for the same processing level within an application, allowing multiple instances of the same cursor to be processed in parallel without section collision. The application server assigns a command source identifier to each statement sent over a single database connection to uniquely identify the application source of the statement. This applies for multiples of the same statement sent by different application sources within the same application, for a single statement containing multiple application sources, and for multiple statements from different applications multiplexed over a single database connection. These statements can be processed separately from and in parallel with the each other without section collision.
摘要:
A method for generating an execution plan for updating and retrieving data from a database in a single process includes: receiving a statement by a server to update a database with a first set of data and to retrieve a second set of data from the database; building a first execution plan to update the database with the first set of data; building a second execution plan to retrieve the second set of data from the database; and building a single execution plan including a combination of the first and second execution plans. The single execution plan allows for the updating and retrieval of data with a single crossing of an interface between a client and the database. By performing both functions in this manner, the efficiency of performing such tasks on the database is significantly increased.
摘要:
A method and system of subsetting a group of server systems configures a server system with a group name and a group port, and with at least one subset name and subset port. The server system, when activated, reads its configuration and registers with a system routing entity as being part of the group name and the group port, and as being part of the subset name and the subset port. In this manner, server systems can be targeted via its subset name and subset port, while also accessible via the common name and port for the group. If the group includes a workload balancer, the server system also registers with the workload balancer using the group name and the subset name, such that workload balancing is provided for the subset.
摘要:
Techniques are provided for processing data. Connections having different security properties are stored, wherein each of the connections allows applications at the client computer to access data sources at a server computer. A request is received from an application to access a data source, wherein the request has associated security properties. In response to the client computer requesting establishment of a connection on behalf of the application, it is determined whether there is a stored connection that used a same set of security properties as are associated with the request from the application and that connected to the data source that the application requests access to. In response to determining that there is a stored connection that used the same set of security properties and that connected to the data source, the connection and an associated client encryption seed, client encryption token, server encryption seed, and server encryption token are re-used. In response to determining that there is not a connection that used the same set of security properties and that connected to the data source, a new client connection key, client encryption seed, client encryption token, sever connection key, server encryption seed, and server encryption token are generated.