com.caucho.db.sql
Class SubSelectExpr

java.lang.Object
  com.caucho.db.sql.Expr
      com.caucho.db.sql.SubSelectExpr

Direct Known Subclasses:

ExistsExpr

public class SubSelectExpr
extends Expr

Field Summary

protected static L10N

L

Fields inherited from class com.caucho.db.sql.Expr

FALSE, TRUE, UNKNOWN

Method Summary

protected Expr	bind(Query query) Binds the expression to the query.
java.lang.String	evalString(QueryContext context) Evaluates the expression as a string.
SelectQuery	getSubSelect() Returns the query.
java.lang.Class	getType() Returns the expected result type of the expression.
long	subCost(java.util.ArrayList<com.caucho.db.sql.FromItem> fromList) Returns the cost based on the given FromList.
java.lang.String	toString()

Methods inherited from class com.caucho.db.sql.Expr

cost, createOrder, evalBoolean, evalDate, evalDouble, evalGroup, evalLong, evalStream, evalToBuffer, evalToBuffer, evalToResult, getIndexExpr, getName, getSQLType, getTable, initGroup, isBinaryStream, isBoolean, isDouble, isLong, isNull, isSelect, splitAnd

Methods inherited from class java.lang.Object

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

Field Detail

L

protected static final L10N L

Method Detail

getSubSelect

public SelectQuery getSubSelect()

Returns the query.

bind

protected Expr bind(Query query)
             throws java.sql.SQLException

Binds the expression to the query.

Overrides:

bind in class Expr

Throws:

java.sql.SQLException

getType

public java.lang.Class getType()

Returns the expected result type of the expression.

Overrides:

getType in class Expr

subCost

public long subCost(java.util.ArrayList<com.caucho.db.sql.FromItem> fromList)

Returns the cost based on the given FromList.

Overrides:

subCost in class Expr

evalString

public java.lang.String evalString(QueryContext context)
                            throws java.sql.SQLException

Evaluates the expression as a string.

Overrides:

evalString in class Expr

Parameters:

rows - the current database tuple

Returns:

the string value

Throws:

java.sql.SQLException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object