Assume that, in addition to the operations read(x) and write(x), a database has the operation copy(x,y), which (atomically) copies the value stored in record x into record y. Design a conflict table for these operations for use in an immediate-update pessimistic concurrency control.
What will be an ideal response?
The conflict table is for operations on a single item. Therefore we must distinguish
the cases where the copy is from the item described by the table and when the copy
is to that item. Copy-from is like a read, and copy-to is like a write.
You might also like to view...
List 5 of the 11 specific competencies dictated by the EBK for the ISO function.
What will be an ideal response?
What key can be pressed repeatedly to increase your brush size?
A. left bracket B. right arrow C. right bracket D. left arrow
To ensure that query results are listed in a desired order, use the ORDER BY clause.
Answer the following statement true (T) or false (F)
In the Perl programming language, which of the following keywords is used in front of function names?
A. func B. declare C. sub D. proc