Package simpledb.query

Interface Summary

Constant	The interface that denotes values stored in the database.
Expression	The interface corresponding to SQL expressions.
Plan	The interface implemented by each query plan.
Scan	The interface will be implemented by each query scan.
UpdateScan	The interface implemented by all updateable scans.

Class Summary

ConstantExpression	An expression consisting entirely of a single constant.
FieldNameExpression	An expression consisting entirely of a single field.
IntConstant	The class that wraps Java ints as database constants.
Predicate	A predicate is a Boolean combination of terms.
ProductPlan	The Plan class corresponding to the product relational algebra operator.
ProductScan	The scan class corresponding to the product relational algebra operator.
ProjectPlan	The Plan class corresponding to the project relational algebra operator.
ProjectScan	The scan class corresponding to the project relational algebra operator.
SelectPlan	The Plan class corresponding to the select relational algebra operator.
SelectScan	The scan class corresponding to the select relational algebra operator.
StringConstant	The class that wraps Java strings as database constants.
TablePlan	The Plan class corresponding to a table.
TableScan	The Scan class corresponding to a table.
Term	A term is a comparison between two expressions.