org.datanucleus.store.mapped.expression
Interface ExpressionLogicSetAdapter

All Known Subinterfaces:
DatastoreAdapter

public interface ExpressionLogicSetAdapter

Interface that allows performing algebra operations over sets

Version:
$Revision: 1.1 $

Method Summary
 java.lang.String cartersianProduct(LogicSetExpression Y)
          Generates a expression that represents the cartesian product of two sets: X and Y.
 

Method Detail

cartersianProduct

java.lang.String cartersianProduct(LogicSetExpression Y)
Generates a expression that represents the cartesian product of two sets: X and Y. Actually, X is not generated to the expression.

Parameters:
Y - right hand set
Returns:
the cartesion product expression. if the cartesian product expression is "X x Y", the returned expression is " x Y". Note that the left hand set was not introduced to the expression


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