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Chapter 13: Query Processing Database System Concepts, 5th Ed . ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use Aug 10, 2006
Chapter 13: Query Processing ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.2 Database System Concepts - 5 th Edition.
Basic Steps in Query Processing 1. Parsing and translation 2. Optimization 3. Evaluation 13.3 Database System Concepts - 5 th Edition.
Basic Steps in Query Processing (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],13.4 Database System Concepts - 5 th Edition.
Basic Steps in Query Processing : Optimization ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.5 Database System Concepts - 5 th Edition.
Basic Steps: Optimization (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.6 Database System Concepts - 5 th Edition.
Measures of Query Cost ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.7 Database System Concepts - 5 th Edition.
Measures of Query Cost (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.8 Database System Concepts - 5 th Edition.
Selection Operation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.9 Database System Concepts - 5 th Edition.
Selection Operation (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.10 Database System Concepts - 5 th Edition.
Selections Using Indices ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.11 Database System Concepts - 5 th Edition.
Selections Involving Comparisons ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.12 Database System Concepts - 5 th Edition.
Implementation of Complex Selections ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.13 Database System Concepts - 5 th Edition.
Algorithms for Complex Selections ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.14 Database System Concepts - 5 th Edition.
Sorting ,[object Object],[object Object],13.15 Database System Concepts - 5 th Edition.
External Sort-Merge ,[object Object],[object Object],13.16 Database System Concepts - 5 th Edition. Let M denote memory size (in pages).
External Sort-Merge (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.17 Database System Concepts - 5 th Edition.
External Sort-Merge (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],13.18 Database System Concepts - 5 th Edition.
Example: External Sorting Using Sort-Merge 13.19 Database System Concepts - 5 th Edition.
External Merge Sort (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.20 Database System Concepts - 5 th Edition.
External Merge Sort (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.21 Database System Concepts - 5 th Edition.
Join Operation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.22 Database System Concepts - 5 th Edition.
Nested-Loop Join ,[object Object],[object Object],[object Object],[object Object],13.23 Database System Concepts - 5 th Edition.
Nested-Loop Join (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.24 Database System Concepts - 5 th Edition.
Block Nested-Loop Join ,[object Object],[object Object],13.25 Database System Concepts - 5 th Edition.
Block Nested-Loop Join (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.26 Database System Concepts - 5 th Edition.
Indexed Nested-Loop Join ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.27 Database System Concepts - 5 th Edition.
Example of Nested-Loop Join Costs ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.28 Database System Concepts - 5 th Edition.
Merge-Join ,[object Object],[object Object],[object Object],[object Object],[object Object],13.29 Database System Concepts - 5 th Edition.
Merge-Join (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.30 Database System Concepts - 5 th Edition.
Hash-Join ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.31 Database System Concepts - 5 th Edition.
Hash-Join (Cont.) 13.32 Database System Concepts - 5 th Edition.
Hash-Join (Cont.) ,[object Object],[object Object],[object Object],13.33 Database System Concepts - 5 th Edition.
Hash-Join Algorithm ,[object Object],[object Object],[object Object],[object Object],[object Object],13.34 Database System Concepts - 5 th Edition. The hash-join of r and s is computed as follows.
Hash Join (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.35 Database System Concepts - 5 th Edition. Relation s is called the build input and r is called the probe input. Hash Join Algorithm (cont)
Hash-Join algorithm (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.36 Database System Concepts - 5 th Edition.
Handling of Overflows ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.37 Database System Concepts - 5 th Edition.
Cost of Hash-Join ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.38 Database System Concepts - 5 th Edition.
Example of Cost of Hash-Join ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.39 Database System Concepts - 5 th Edition. customer depositor
Hybrid Hash–Join ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.40 Database System Concepts - 5 th Edition.
Complex Joins ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.41 Database System Concepts - 5 th Edition.
Other Operations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.42 Database System Concepts - 5 th Edition.
Other Operations : Aggregation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.43 Database System Concepts - 5 th Edition.
Other Operations : Set Operations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.44 Database System Concepts - 5 th Edition.
Other Operations : Outer Join ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.45 Database System Concepts - 5 th Edition.
Evaluation of Expressions ,[object Object],[object Object],[object Object],[object Object],[object Object],13.46 Database System Concepts - 5 th Edition.
Materialization ,[object Object],[object Object],13.47 Database System Concepts - 5 th Edition.
Materialization (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.48 Database System Concepts - 5 th Edition.
Pipelining ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.49 Database System Concepts - 5 th Edition.
Pipelining (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.50 Database System Concepts - 5 th Edition.
Pipelining (Cont.) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.51 Database System Concepts - 5 th Edition.
Evaluation Algorithms for Pipelining ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.52 Database System Concepts - 5 th Edition.
End of Chapter Database System Concepts, 5th Ed . ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use
Figure 13.2 13.54 Database System Concepts - 5 th Edition.
Complex Joins ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],13.55 Database System Concepts - 5 th Edition.

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ch13

  • 1. Chapter 13: Query Processing Database System Concepts, 5th Ed . ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use Aug 10, 2006
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  • 3. Basic Steps in Query Processing 1. Parsing and translation 2. Optimization 3. Evaluation 13.3 Database System Concepts - 5 th Edition.
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  • 19. Example: External Sorting Using Sort-Merge 13.19 Database System Concepts - 5 th Edition.
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  • 32. Hash-Join (Cont.) 13.32 Database System Concepts - 5 th Edition.
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  • 53. End of Chapter Database System Concepts, 5th Ed . ©Silberschatz, Korth and Sudarshan See www.db-book.com for conditions on re-use
  • 54. Figure 13.2 13.54 Database System Concepts - 5 th Edition.
  • 55.