Chapter 17: Parallel Databases
... ©Silberschatz, Korth and Sudarshan See www.dbbook.com for conditions on reuse ...
... ©Silberschatz, Korth and Sudarshan See www.dbbook.com for conditions on reuse ...
Oracle_ch13 - Gonzaga University
... VIEW and NON-Equality Join • Combing both VIEW (chapter 13) and NONEQUALITY JOINS (chapter 9; p.304) • A non-equality join enables you to store a range's minimum value in one column of a record and the maximum value in another column. So instead of finding a column-to-column match, you can use a non ...
... VIEW and NON-Equality Join • Combing both VIEW (chapter 13) and NONEQUALITY JOINS (chapter 9; p.304) • A non-equality join enables you to store a range's minimum value in one column of a record and the maximum value in another column. So instead of finding a column-to-column match, you can use a non ...
Enabling Intensional Access Control via Preference
... object can be used to efficiently predict the elements that make up that object in a novel way. Towards investigating this theory, she will query a small database of radio telescope readings and the elements known to be found in those objects that is maintained by PIT (in a table called simply “radi ...
... object can be used to efficiently predict the elements that make up that object in a novel way. Towards investigating this theory, she will query a small database of radio telescope readings and the elements known to be found in those objects that is maintained by PIT (in a table called simply “radi ...
CSR installation instructions
... The Conversion Software Registry (CSR) system is a web-based service for finding software to convert a file form one format to another. The CSR database stores information specifically about software and its supported input and output formats. In addition to being a general web service the CSR also ...
... The Conversion Software Registry (CSR) system is a web-based service for finding software to convert a file form one format to another. The CSR database stores information specifically about software and its supported input and output formats. In addition to being a general web service the CSR also ...
Slides - CIS @ Temple University
... else for each non-empty subset S1 of S such that S1 S P1= findbestplan(S1) P2= findbestplan(S - S1) A = best algorithm for joining results of P1 and P2 cost = P1.cost + P2.cost + cost of A if cost < bestplan[S].cost bestplan[S].cost = cost bestplan[S].plan = “execute P1.plan; execute P2.plan; join ...
... else for each non-empty subset S1 of S such that S1 S P1= findbestplan(S1) P2= findbestplan(S - S1) A = best algorithm for joining results of P1 and P2 cost = P1.cost + P2.cost + cost of A if cost < bestplan[S].cost bestplan[S].cost = cost bestplan[S].plan = “execute P1.plan; execute P2.plan; join ...
Managing scientific data - Infoscience
... integration, data archiving, and data processing: Workflow management. In a simple scenario, a scientific experiment is performed according to a workflow that dictates the sequence of tasks to be executed from the beginning until the end of the experiment. The tasks coarsely define the manner and me ...
... integration, data archiving, and data processing: Workflow management. In a simple scenario, a scientific experiment is performed according to a workflow that dictates the sequence of tasks to be executed from the beginning until the end of the experiment. The tasks coarsely define the manner and me ...
CSc-340 10a
... transaction may not be serializable – it may find some records inserted by a transaction but not find others. Read committed — only committed records can be read, but successive reads of record may return different (but committed) values. Read uncommitted — even uncommitted records may be read. ...
... transaction may not be serializable – it may find some records inserted by a transaction but not find others. Read committed — only committed records can be read, but successive reads of record may return different (but committed) values. Read uncommitted — even uncommitted records may be read. ...
งานนำเสนอ PowerPoint
... module is responsible for implementing a particular strategy for concurrency control. If a failure occurs during the transaction, then the database could be inconsistent. It is the task of the recovery manager to ensure that the database in consistent state. Finally, the buffer manager is responsibl ...
... module is responsible for implementing a particular strategy for concurrency control. If a failure occurs during the transaction, then the database could be inconsistent. It is the task of the recovery manager to ensure that the database in consistent state. Finally, the buffer manager is responsibl ...
ppt - Avi Silberschatz
... Persistent messaging systems are systems that provide transactional properties to messages Messages are guaranteed to be delivered exactly once ...
... Persistent messaging systems are systems that provide transactional properties to messages Messages are guaranteed to be delivered exactly once ...
KorthDB6_ch15
... specified by the partial order (graph-based protocol). Timeout-Based Schemes : a transaction waits for a lock only for a specified amount of ...
... specified by the partial order (graph-based protocol). Timeout-Based Schemes : a transaction waits for a lock only for a specified amount of ...
CTAMS Geomedia User Tool Documentation July 1998
... To create a Feature Schema, activate the Feature Loader in Geomedia by using IowaDOT > Import Geometry From Text File located on the Geomedia menu bar. The main Feature Loader screen will appear. To create a Feature Schema click the Create button located halfway down the form. The Feature Schema Set ...
... To create a Feature Schema, activate the Feature Loader in Geomedia by using IowaDOT > Import Geometry From Text File located on the Geomedia menu bar. The main Feature Loader screen will appear. To create a Feature Schema click the Create button located halfway down the form. The Feature Schema Set ...
Concurrency_Control_Techniques
... If transaction T issues write_item (X) and version i of X has the highest write_TS(Xi) of all versions of X that is also less than or equal to TS(T), and read _TS(Xi) > TS(T), then abort and roll-back T; otherwise create a new version Xi and read_TS(X) = write_TS(Xj) = TS(T). If transaction T issues ...
... If transaction T issues write_item (X) and version i of X has the highest write_TS(Xi) of all versions of X that is also less than or equal to TS(T), and read _TS(Xi) > TS(T), then abort and roll-back T; otherwise create a new version Xi and read_TS(X) = write_TS(Xj) = TS(T). If transaction T issues ...
to (English)
... Conceptually, generate all equivalent expressions by repeatedly executing the following step until no more expressions can be found: for each expression found so far, use all applicable equivalence rules add newly generated expressions to the set of expressions found so far The above approac ...
... Conceptually, generate all equivalent expressions by repeatedly executing the following step until no more expressions can be found: for each expression found so far, use all applicable equivalence rules add newly generated expressions to the set of expressions found so far The above approac ...
A,r - NYU Computer Science
... Conceptually, generate all equivalent expressions by repeatedly executing the following step until no more expressions can be found: for each expression found so far, use all applicable equivalence rules add newly generated expressions to the set of expressions found so far The above approac ...
... Conceptually, generate all equivalent expressions by repeatedly executing the following step until no more expressions can be found: for each expression found so far, use all applicable equivalence rules add newly generated expressions to the set of expressions found so far The above approac ...
November 28°, 2015
... Time Granularity: Determines the time interval at which runtime execution statistics data is aggregated into the query store. To optimize for space usage, the runtime execution statistics in the Runtime Stats Store are aggregated over a fixed time window. This fixed time window is configured via INT ...
... Time Granularity: Determines the time interval at which runtime execution statistics data is aggregated into the query store. To optimize for space usage, the runtime execution statistics in the Runtime Stats Store are aggregated over a fixed time window. This fixed time window is configured via INT ...
A Conceptual Model and Predicate Language for Data Selection
... David W. Archer and Lois M. L. Delcambre Department of Computer Science, Portland State University Portland, OR 97207 USA {darcher, lmd @cs.pdx.edu} Abstract Writing relational database queries over current provenance databases can be complex and error-prone because application data is typically mix ...
... David W. Archer and Lois M. L. Delcambre Department of Computer Science, Portland State University Portland, OR 97207 USA {darcher, lmd @cs.pdx.edu} Abstract Writing relational database queries over current provenance databases can be complex and error-prone because application data is typically mix ...
Data Integrity Constraints
... ENABLE … EXCEPTIONS into … can be used after creating a table (usually called EXCEPTIONS) to hold the rowid of rows that violate a constraint ON DELETE CASCADE and ON DELETE SET NULL define the behavior of the database when a parent row is deleted The CHECK constraint can look for a specified list o ...
... ENABLE … EXCEPTIONS into … can be used after creating a table (usually called EXCEPTIONS) to hold the rowid of rows that violate a constraint ON DELETE CASCADE and ON DELETE SET NULL define the behavior of the database when a parent row is deleted The CHECK constraint can look for a specified list o ...
Referential Integrity Is Important For Databases
... Referential integrity is a database constraint that ensures that references between data are indeed valid and intact. Referential integrity is a fundamental principle of database theory and arises from the notion that a database should not only store data, but should actively seek to ensure its qual ...
... Referential integrity is a database constraint that ensures that references between data are indeed valid and intact. Referential integrity is a fundamental principle of database theory and arises from the notion that a database should not only store data, but should actively seek to ensure its qual ...