com.caucho.db.sql

Class GroupResultExpr

java.lang.Object

com.caucho.db.sql.Expr

com.caucho.db.sql.GroupResultExpr

All Implemented Interfaces:

GroupExpr

public class GroupResultExpr
extends Expr
implements GroupExpr

Represents a GROUP BY expression.

Field Summary

Fields

Modifier and Type	Field and Description
protected static L10N	L

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

FALSE, TRUE, UNKNOWN

Method Summary

Modifier and Type	Method and Description
Expr	bind(Query query)
void	evalGroup(QueryContext context) Evaluates aggregate functions during the group phase.
java.lang.String	evalString(QueryContext context) Evaluates the expression as a string.
java.lang.String	getName() Returns any name.
java.lang.String	toString()

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

cost, createOrder, evalBoolean, evalBytes, evalDate, evalDouble, evalEqual, evalEqual, evalLong, evalStream, evalToBuffer, evalToBuffer, evalToResult, getIndexExpr, getSQLType, getTable, getType, getTypeCode, indexCost, indexSubCost, initGroup, isBinaryStream, isBoolean, isDouble, isLong, isNull, isNullable, isParam, isSelect, splitAnd, subCost, updateDouble, updateLong, updateString

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

getName

public java.lang.String getName()

Returns any name.

Overrides:

getName in class Expr

bind

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

Overrides:

bind in class Expr

Throws:

java.sql.SQLException

evalGroup

public void evalGroup(QueryContext context)
               throws java.sql.SQLException

Evaluates aggregate functions during the group phase.

Overrides:

evalGroup in class Expr

Parameters:

context - the current database tuple

Throws:

java.sql.SQLException

evalString

public java.lang.String evalString(QueryContext context)

Description copied from class: Expr

Evaluates the expression as a string.

Overrides:

evalString in class Expr

Returns:

the string value

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object