Value Class Reference

#include <Pt/Db/Value.h>

One column value of a query result. More...

Public Member Functions
	Value (IValue *value=0)
	Takes ownership of the backend value.
bool	isNull () const
	Returns true if the value is unbound or SQL NULL.
bool	getBool () const
	Returns the value as bool.
int	getInt () const
	Returns the value as int.
unsigned	getUnsigned () const
	Returns the value as unsigned.
float	getFloat () const
	Returns the value as float.
double	getDouble () const
	Returns the value as double.
char	getChar () const
	Returns the value as char.
std::string	getString () const
	Returns the value as string.
Date	getDate () const
	Returns the value as date.
Time	getTime () const
	Returns the value as time.
DateTime	getDateTime () const
	Returns the value as date-time.
bool	operator! () const
	Returns true if this object is not bound to a value.
const IValue *	getImpl () const
	Returns the backend implementation.
void	getBlob (Blob &blobdata) const
	Writes the value as binary data into blobdata.

Detailed Description

Value is one column of a Row. It is a shared value. An unbound value and SQL NULL both make isNull() true. operator!() is true when the object is not bound.

Typed getters convert the stored value. A null or a conversion that cannot be performed throws TypeMismatch. getChar() on a string returns the first character. getBlob() writes binary data into a Blob.

Member Function Documentation

getBool()

bool getBool

(

)

const

Exceptions

%TypeMismatch

if the value is null or cannot be converted.

getInt()

int getInt

(

)

const

Exceptions

%TypeMismatch

if the value is null or cannot be converted.

getUnsigned()

unsigned getUnsigned

(

)

const

Exceptions

%TypeMismatch

if the value is null or cannot be converted.

getFloat()

float getFloat

(

)

const

Exceptions

%TypeMismatch

if the value is null or cannot be converted.

getDouble()

double getDouble

(

)

const

Exceptions

%TypeMismatch

if the value is null or cannot be converted.

getChar()

char getChar

(

)

const

If the value is a string, the first character is returned.

Exceptions

%TypeMismatch

if the value is null or cannot be converted.

getString()

std::string getString

(

)

const

Exceptions

%TypeMismatch

if the value is null or cannot be converted.

getDate()

Date getDate

(

)

const

Exceptions

%TypeMismatch

if the value is null or cannot be converted.

getTime()

Time getTime

(

)

const

Exceptions

%TypeMismatch

if the value is null or cannot be converted.

getDateTime()

DateTime getDateTime

(

)

const

Exceptions

%TypeMismatch

if the value is null or cannot be converted.

getBlob()

void getBlob

(

Blob &

blobdata

)

const

Exceptions

%TypeMismatch

if the value is null or cannot be converted.