However, current database management systems (DBMSs) are generally ineffective in exploiting the parallelism of such systems. In particular, contention can lead to a dramatic fall in performance. In this paper, we propose a new concurrency control protocol called DGCC (Dependency Graph based ...
DBMS - Join Operation Vs. Nested Query DBMS - Armstrong's Axioms DBMS - Dependency Preserving Decomposition DBMS - Thomas Write Rule DBMS - Equivalence of Functional Dependencies DBMS - Timestamp Ordering Protocol DBMS - Precedence Graph DBMS - Database Recovery Techniques DBMS - Schema & Instances...
This structure, as we have seen before, allows the user of a system based on it to define types in more detail than is shown in the model. Business Rule The first instances of program module type must be “DBMS Trigger”, “Stored procedure”, and so on to correspond to the sub-...
{b} & {b} -> {c}, when only the {a,c} columns are selected in the projection, we need to maintain the closure and transitive properties of this functional dependency graph, generating the remaining {a} -> {c} functional dependencies for the rest FD graph when column b is projected ...
2004) is a prior art description of a system containing two subsystems. Dependency relationships between the subsystems are one of three possible types. In FIG. 2A, the Graph Representation200chart of these three types of relationships shows the two systems in a Parallel202relationship where neith...
DBMS - Join Operation Vs. Nested Query DBMS - Armstrong's Axioms DBMS - Dependency Preserving Decomposition DBMS - Thomas Write Rule DBMS - Equivalence of Functional Dependencies DBMS - Timestamp Ordering Protocol DBMS - Precedence Graph DBMS - Database Recovery Techniques DBMS - Schema & Instances...