com.caucho.db.fun

Class NowExpr

java.lang.Object

com.caucho.db.sql.Expr

com.caucho.db.sql.FunExpr

com.caucho.db.fun.NowExpr

public class NowExpr
extends FunExpr

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

Constructor Summary

Constructors

Constructor and Description
NowExpr()

Method Summary

Modifier and Type	Method and Description
protected void	addArg(Expr expr)
double	evalDouble(QueryContext context) Evaluates the expression as a double.
long	evalLong(QueryContext context) Evaluates the expression as a long.
java.lang.String	evalString(QueryContext context) Evaluates the expression as a string.
java.lang.Class	getType() Returns the expected result type of the expression.
boolean	isNull(QueryContext context) Returns true for a null value.

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

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

Methods inherited from class java.lang.Object

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

Field Detail

L

protected static final L10N L

Constructor Detail

NowExpr

public NowExpr()

Method Detail

addArg

protected void addArg(Expr expr)
               throws java.sql.SQLException

Specified by:

addArg in class FunExpr

Throws:

java.sql.SQLException

getType

public java.lang.Class getType()

Returns the expected result type of the expression.

Overrides:

getType in class Expr

isNull

public boolean isNull(QueryContext context)
               throws java.sql.SQLException

Returns true for a null value.

Overrides:

isNull in class Expr

Parameters:

rows - the current tuple being evaluated

Returns:

true if null

Throws:

java.sql.SQLException

evalDouble

public double evalDouble(QueryContext context)
                  throws java.sql.SQLException

Evaluates the expression as a double.

Overrides:

evalDouble in class Expr

Parameters:

rows - the current tuple being evaluated

Returns:

the double value

Throws:

java.sql.SQLException

evalLong

public long evalLong(QueryContext context)
              throws java.sql.SQLException

Evaluates the expression as a long.

Overrides:

evalLong in class Expr

Parameters:

rows - the current tuple being evaluated

Returns:

the long value

Throws:

java.sql.SQLException

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 tuple being evaluated

Returns:

the string value

Throws:

java.sql.SQLException