net.ontopia.persistence.query.sql

Class SQLExists

java.lang.Object

net.ontopia.persistence.query.sql.SQLExists

All Implemented Interfaces:

SQLExpressionIF

public class SQLExists
extends 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

Fields

Modifier and Type	Field and Description
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

Constructors

Constructor and Description
SQLExists(SQLExpressionIF expression)

Method Summary

Modifier and Type	Method and Description
SQLExpressionIF	getExpression()
int	getType() INTERNAL: Returns the expression type.
void	setExpression(SQLExpressionIF expression)
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 String toString()

Overrides:

toString in class Object