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Explain the phases of query processing in distributed database.
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teamques10
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written 2.1 years ago by
DevarenjiniP
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Layers of Query Processing
Query processing has 4 layers:
• Query Decomposition
• Data Localization
• Global Query Optimization
• Distribution Query Execution
Query Decomposition
The first layer decomposes the calculus query into an algebraic query on global relations. The information needed for this transformation is found in the global …
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