com.caucho.db.sql

Class SubSelectParamExpr

java.lang.Object

com.caucho.db.sql.Expr

com.caucho.db.sql.SubSelectParamExpr

@Module
public class SubSelectParamExpr
extends Expr

Field Summary

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

FALSE, L, TRUE, UNKNOWN

Method Summary

Modifier and Type	Method and Description
Expr	bind(Query parent) Binds the expression.
void	eval(QueryContext parent, QueryContext context) Sets the value.
int	evalBoolean(QueryContext context) Evaluates the expression as a boolean.
long	evalDate(QueryContext context) Evaluates the expression as a date
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.
int	evalToBuffer(QueryContext context, byte[] buffer, int offset) Evaluates the expression to a buffer
Expr	getExpr() Returns the expr.
java.lang.Class	getType() Returns the type of the expression.
boolean	isNull(QueryContext context) Evaluates the expression as a string.
long	subCost(java.util.ArrayList<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, evalBytes, evalEqual, evalEqual, evalGroup, evalStream, evalToBuffer, evalToResult, getIndexExpr, getName, getSQLType, getTable, getTypeCode, indexCost, indexSubCost, initGroup, isBinaryStream, isBoolean, isDouble, isLong, isNullable, isParam, isSelect, splitAnd, updateDouble, updateLong, updateString

Methods inherited from class java.lang.Object

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

Method Detail

getType

public java.lang.Class getType()

Returns the type of the expression.

Overrides:

getType in class Expr

getExpr

public Expr getExpr()

Returns the expr.

subCost

public long subCost(java.util.ArrayList<FromItem> fromList)

Returns the cost based on the given FromList.

Overrides:

subCost in class Expr

bind

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

Binds the expression.

Overrides:

bind in class Expr

Throws:

java.sql.SQLException

eval

public void eval(QueryContext parent,
                 QueryContext context)
          throws java.sql.SQLException

Sets the value.

Throws:

java.sql.SQLException

isNull

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

Evaluates the expression as a string.

Overrides:

isNull in class Expr

Parameters:

rows - the current database tuple

Returns:

the string 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 database tuple

Returns:

the string value

Throws:

java.sql.SQLException

evalBoolean

public int evalBoolean(QueryContext context)
                throws java.sql.SQLException

Evaluates the expression as a boolean.

Overrides:

evalBoolean in class Expr

Parameters:

rows - the current database tuple

Returns:

the boolean 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 database tuple

Returns:

the long value

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 database tuple

Returns:

the double value

Throws:

java.sql.SQLException

evalDate

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

Evaluates the expression as a date

Overrides:

evalDate in class Expr

Parameters:

rows - the current database tuple

Returns:

the date value

Throws:

java.sql.SQLException

evalToBuffer

public int evalToBuffer(QueryContext context,
                        byte[] buffer,
                        int offset)
                 throws java.sql.SQLException

Evaluates the expression to a buffer

Overrides:

evalToBuffer in class Expr

Parameters:

rows - the current database tuple

Returns:

the date value

Throws:

java.sql.SQLException

toString

public java.lang.String toString()

Overrides:

toString in class java.lang.Object