15664566
Description
Mind Map by Parag Gawde, updated more than 1 year ago
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Created by Parag Gawde
over 5 years ago
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Query Processing
- Parsing
- checks syntax, verifies relation
- checks syntax, verifies relation
- Optimization
- determines the most efficient way to
execute a given query by considering the
possible query plans
- determines the most efficient way to
execute a given query by considering the
possible query plans
- Translation
- Translate the query into its internal form
- Further, translates into relational algebra.
- Further, translates into relational algebra.
- Translate the query into its internal form
- Evaluation
- In this, the query evaluation engine
takes a query evaluation plan,
executes that plan and returns the
answer to the query.
- In this, the query evaluation engine
takes a query evaluation plan,
executes that plan and returns the
answer to the query.
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