net.ontopia.persistence.query.sql
Class SQLExists

java.lang.Object
  net.ontopia.persistence.query.sql.SQLExists

All Implemented Interfaces:

SQLExpressionIF

public class SQLExists
extends java.lang.Object
implements SQLExpressionIF

INTERNAL: SQL condition: exists. Evaluates to true if the left value contains the right value.

An EXISTS condition tests for existence of rows in a subquery.

Field Summary

protected SQLExpressionIF

expression

Fields inherited from interface net.ontopia.persistence.query.sql.SQLExpressionIF

AND, EQUALS, EXISTS, FALSE, IN, IS_NULL, JOIN, LIKE, NOT, NOT_EQUALS, OR, SET_OPERATION, VALUE_EXPRESSION, VERBATIM

Constructor Summary

SQLExists(SQLExpressionIF expression)

Method Summary

SQLExpressionIF	getExpression()
int	getType() INTERNAL: Returns the expression type.
void	setExpression(SQLExpressionIF expression)
java.lang.String	toString()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Detail

expression

protected SQLExpressionIF expression

Constructor Detail

SQLExists

public SQLExists(SQLExpressionIF expression)

Method Detail

getType

public int getType()

Description copied from interface: SQLExpressionIF

INTERNAL: Returns the expression type. The type is represented by one of the constants in the SQLExpressionIF interface.

Specified by:

getType in interface SQLExpressionIF

getExpression

public SQLExpressionIF getExpression()

setExpression

public void setExpression(SQLExpressionIF expression)

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object