Data processing: database and file management or data structures – Database design – Data structure types
Reexamination Certificate
2005-11-01
2005-11-01
Corrielus, Jean M. (Department: 2162)
Data processing: database and file management or data structures
Database design
Data structure types
C707S793000, C707S793000
Reexamination Certificate
active
06961729
ABSTRACT:
A mechanism is described for constructing work granules, where the work granules are constructed independently of whether two or more of the work granules are assigned to operate on a logical storage unit that contains a portion of the same row. A database system maintains transaction control data for data blocks in a manner that avoids self-deadlocks for slaves that follow a row collision protocol. A row collision protocol is a set of rules or steps that slaves follow to ensure that only one subtransaction in a distributed transaction updates a spanning row. Thus, for a particular spanning row, a single subtransaction modifies all the row pieces of the spanning row in any data block containing any row pieces of the spanning row. Consequently, a given data block may be affected by multiple subtransactions in a distributed transaction, one subtransaction affecting a row piece in the data block, another subtransaction affecting other rows in the data block.
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Ganesh Amit
Klein Jonathan D.
Ngai Gary C.
Potapov Dmitry Mikhailovich
Toohey Rosanne Park
Bingham Marcel K.
Corrielus Jean M.
Hickman Palermo & Truong & Becker LLP
Oracle International Corporation
To Baoquoc N.
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