G - Physics – 06 – F
Patent
G - Physics
06
F
G06F 17/30 (2006.01) G06F 9/45 (2006.01)
Patent
CA 2382712
Conflict checking for writing operations in an SQL database system is carried out for nested statements invoked by a parent statement. Each statement has an associated table access data structure defined at compile-time indicating the tables in the database that the statement accesses and the mode of access. At execution-time the table access data structure for each nested statement is accessed and the information is compared with a list of tables maintained for the parent statement to determine if there is a read/write or write/write conflict possible if the nested statement is executed. Where there is no conflict detected, the information from the table access data structure is copied to the list of tables.
Bird Paul M.
Doole Douglas J.
Ibm Canada Limited-Ibm Canada Limitee
Rosen Arnold
LandOfFree
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