isql.predicate
Class LikePredicate

java.lang.Object
  isql.predicate.LikePredicate

All Implemented Interfaces:

IPredicate

public class LikePredicate
extends java.lang.Object
implements IPredicate

exp LIKE exp can be a column or an expression that involves table columns or a constant (which does actually not make so much sense)

Author:

SHZ Oct 11, 2007

Constructor Summary

LikePredicate(IExpression test, java.lang.String like, ColumnValues values, boolean negated)

Method Summary

WhereView	apply() Returns, for each involved column, the indices (possibly repeated) of the table rows that are connected by the predicate.
java.lang.String	toString()

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

LikePredicate

public LikePredicate(IExpression test,
                     java.lang.String like,
                     ColumnValues values,
                     boolean negated)

Parameters:

test -

like -

Method Detail

apply

public WhereView apply()
                throws ISQLException

Description copied from interface: IPredicate

Returns, for each involved column, the indices (possibly repeated) of the table rows that are connected by the predicate. In practice it returns a view that consists of the table rows of the involved tables put together depending by the predicate. For example a C1 = C2 operator will put together all the table rows for which the columns C1 and C2 are equal, and discard the others

Specified by:

apply in interface IPredicate

Returns:

map table name -> indices of the rows that the predicate connects (possibly repeated).

Throws:

ISQLException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object