International Business Machines Corporation

Reinhold Geiselhart

Felix O Beier

Knut Stolze

Luis Eduardo Oliveira Lizardo

Rene Blath

Frank Küster

Vassil Radkov Dimov

Alexander Lang

Iliyana P Ivanova

Zalina Baysarova

Juergen Schimpf

Christoph Lingenfelder

Verena Henrich

Frank Kuster

Janna Orechkina

Dominik Schnell

Magdalena Leshtanska

A request to query sampled data of a database is obtained. Based on the request, a determination is made as to whether access to the sampled data of the database is to be allowed. To determine whether access to the sampled data of the database is to be allowed, a query domain defined for the query is checked with a data domain defined for the sampled data. Based on determining that access is to be allowed, access to the sampled data, via the query, is allowed.

Controlling access to sampled databases

Modifying original computer-generated messages is provided. An original computer-generated message is modified by at least one of replacing text or appending text of the original computer-generated message according to instructions located in a structure of a selected modification layer to form a modified computer-generated message corresponding to a current user-system context of a user of the computer system. The modified computer-generated message corresponding to the current user-system context of the user is output.

Crowd-based intelligence for computer message enhancement

A computer implemented method includes identifying a query view of a target database system enabling access to a first source table stored in a first target table, executing a load program for a current version of a first source partition of the first source table, wherein executing the load program includes loading the first source partition in a second load target partition of the first target table, changing the query view to select records of the first target table, executing an update program for assigning records of the first replication target partition to the first load target partition, selecting a mode of operation for a replication program based on determining whether the execution of the update program is finished, executing the replication program in accordance with the selected mode of operation, and changing the query view to further select the records of the first replication target partition.

Loading data in a target database system using different synchronization programs

The present disclosure relates to a method for storing a table in a database system. The table comprises a first set of one or more columns of first data type and a second set of one or more columns of second data type. The method comprises: storing the first set of columns and a set of locator columns in a first regular table space. The second set of columns may be stored in a second large object table space. In case a first recorded data volume is higher than or equal to a second recorded data volume, data of the second large object table space may be assigned to a first large object table space. In case the first recorded data volume is smaller than the second recorded data volume, data of the first regular table space may be assigned to a second regular table space.

Storing a table in a database system

A computer-implemented method for facilitating large data transfers from a first data management system to a second data management system is disclosed. The method comprises receiving data from the first data management system by a first buffer component, rerouting, upon the first buffer component reaching a predefined fill-level, dynamically the received data to a second buffer component, wherein the second buffer component is adapted to process the rerouted received data, forwarding, by the second buffer component, the rerouted data once the first buffer component is again ready for receiving the rerouted data from the second buffer component, and sending, by a sending component, the data buffered in the first component to the second data management system.

Processing large query results in a database accelerator environment

A computer implemented method for synchronizing a first database with a second database. The method comprises a replication method comprising determining that a first change in the first database fulfils a defined tolerance range in response to detecting that the first change indicates a value of at least one selected attribute of the set of attributes, and determining that a second change in the first database does not fulfil the defined tolerance range in response to detecting that the second change indicates a value of at least one selected attribute of the set of attributes. The replication method further comprises preventing replication of the first change to the second database in response to determining that the first change fulfils the tolerance range, and replicating the second change to the second database in response to determining that the second change does not fulfil the tolerance range.

Conditional replication of data

The invention relates to a computer-implemented method for managing multiple services in a DBMS. The services respectively are configured to process data that is stored in or is received for being stored in a database managed by the DBMS. The method comprises providing a service manager operatively coupled to the DBMS; registering the multiple services automatically and dynamically at runtime of the DBMS at the service manager; and automatically managing, by the service manager, dependencies between different ones of the multiple registered services.

Service management in a DBMS

In an approach to copying of table rows across logical nodes in a distributed database system comprising a plurality of logical nodes, for each logical node of a plurality of logical nodes, a connection is made to a current logical node of the plurality of logical nodes. One or more rows are selected from source nodes of the logical nodes to be stored in a target table on the current logical node, where the one or more rows are selected based on a distribution rule for distributing data in the distributed database system. The rows are stored into the target table, where the rows are pulled from the source nodes and stored in the current logical node.

Distributing rows of a table in a distributed database system

Visual data transmission by an air-gapped system, including: transmitting, by an air-gapped system comprising at least one first computing device, a visual encoding of data via a display; detecting, during capture of the visual encoding of the data by a second computing device via a camera, an error; generating, by the second computing device in response to the error, and alert; and retransmitting, in response to a user input to the air-gapped system, at least a portion of the visual encoding of the data via the display.

Visual data transmission by an air-gapped system

In an approach for dynamically selecting the application algorithm to be used for each change in a target database system, a processor provides at least two application algorithms for applying changes to a table in a target database system. A processor determines, for each application algorithm of the at least two application algorithms, a performance behavior of each application algorithm for sizes of changes that are applied to the table by the respective application algorithm. A processor receives a data change request for applying a change to the table. A processor determines a size of the change to the table. A processor selects one of the at least two application algorithms that provides a best performance for the size based on the performance behavior of each application algorithm. A processor applies the change to the table using the selected application algorithm that provides the best performance for the size.

Applying changes in a target database system

Controlling the timing of an execution of a database query for test purposes includes: receiving the database query, the database query comprising control code; the control code causing a database management system to control the timing of the execution of the database query within the database management system; executing the database query within the database management system.

Controlling the timing of a database query execution

Managing concurrent accesses by a set of tasks to a shared resource of a computer system. Synchronizing the set of tasks for assigning and releasing a resource according to a predefined access period with flexibility of providing an extended access period where an external task is not detected during the predefined access period. Where an extended access period is provided, resynchronizing is performed, and the external task is identified and access is prevented when the external task is determined to be a particular type of task.

Managing concurrent accesses by a set of tasks to a shared resource of a computer system

Methods, computer program products, and/or systems are provided that perform the following operations: generating log files while performing data changes of a source database system table; storing the log files on a first memory device having a first access time; archiving a part of the log files from the first memory device on a second memory device having a second access time, the second access time being higher than the first access time; tracking a second number of pending data changes, the pending data changes being data changes of the records of data change of log files archived on the second memory device which are not yet replicated in a target database system table; selecting a type of data replication from a first type of data replication and a second type of data replication based on the second number; and replicating the data changes in the target database system table.

Replicating data changes using multiple storage devices and tracking records of pending data changes stored on the storage devices

A computer-implemented method, a computer program product, and a computer system for detecting an inappropriate data type of a column in a database and correcting an encoding for the column. The computer system detects in a table a candidate column that has a mismatching type definition, using database usage statistics. The computer system determines whether conversion of the candidate column is possible. In response to determining that the conversion of the candidate column is possible, the computer system converts values in the candidate column with a first data type to values in a new column with a second data type. The computer system appends the new column in the table. The computer system registers the new column and the second data type in a metadata catalog. The computer system generates a query plan operator for processing a query for the new column.

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Rottenburg-Ergenzingen, Germany

Reinhold Geiselhart