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Final Review

Final Review. Datalog (Ch 10) Rules and queries RA expressions for Datalog rules Datalog program as a query expression and rectification Concept of Safety Negation combined with Recursion Safe and Stratified Rules Fixed Point Solution for recursive and non-recursive datalog programs.

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Final Review

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  1. Final Review • Datalog (Ch 10) • Rules and queries • RA expressions for Datalog rules • Datalog program as a query expression and rectification • Concept of Safety • Negation combined with Recursion • Safe and Stratified Rules • Fixed Point Solution for recursive and non-recursive datalog programs

  2. Index Structures (Ch. 13) • Conventional Indexes • Dense, Sparse, Multiple levels, Secondary • B+ Tree • Hash Tables • Extensible and Linear

  3. Logging (Ch. 17) • Basics of UNDO and REDO logging, checkpointing, recovery

  4. Concurrency Control (Ch. 18) • Serializability, schedules, transactions, • Conflict Serializability • Precedence graphs • Lock-based protocols, Two-phase locking • Tree protocol • Timestamp-based protocol

  5. More about TM (Ch. 19) • Dirty data problem, cascading rollback, recoverable schedules • Resolving deadlocks, timeouts, the Waits-for graph, locks by ordering elements, timestamps

  6. The Query Compiler (Ch. 16) • Algebraic laws • Estimating sizes of intermediate relations • Projection, Selection, and Join

  7. Query Execution (Ch. 15) • Nested-loop joins • Sort-based joins • Index-based Selection • Index-based Join

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