Dv::Sql::Command::iterator Class Reference

A logical pointer (input iterator) inside the query result of a Dv::Sql::Command. More...

#include <sqldb.h>

Collaboration diagram for Dv::Sql::Command::iterator:

[legend]List of all members.


Public Member Functions
iterator &	operator++ () throw (Exception)
	Make the iterator point to the next row in the result: prefix version.
iterator	operator++ (int)
	Make the iterator point to the next row in the result: postfix version.
std::vector< std::string >	operator * () const throw (Exception)
	Dereference to the current row.
bool	operator== (const iterator &j) const
	Compare two iterators.
bool	operator!= (const iterator &j) const
	Compare two iterators.
std::string	operator() (unsigned int c) const throw (Exception)
	Non standard operator: get c'th column of current row.
Command &	command () const
	Return command associated with iterator.
Private Types
enum	{ END = -1, BEGIN = 0 }
Private Member Functions
	iterator (Command &cmd, int r)
Private Attributes
Command &	cmd_
int	row_
Friends
class	Command
	Friend.

Detailed Description

A logical pointer (input iterator) inside the query result of a Dv::Sql::Command.

A valid iterator in the range [begin,end[ points to a row of the query result.

Its value type is the type of a row in the query result, i.e. a vector of strings (classes like Dv::Int can be used to convert to numeric types, see dvutil).

Definition at line 408 of file sqldb.h.

Member Enumeration Documentation

anonymous enum [private]

Enumeration values:

END

BEGIN

Definition at line 449 of file sqldb.h.

Constructor & Destructor Documentation

Dv::Sql::Command::iterator::iterator ( Command & cmd,

int r

) [inline, private]

Definition at line 454 of file sqldb.h.
References cmd_, and row_.

Member Function Documentation

iterator& Dv::Sql::Command::iterator::operator++ ( ) throw (Exception)

Make the iterator point to the next row in the result: prefix version.

iterator Dv::Sql::Command::iterator::operator++ ( int ) [inline]

Make the iterator point to the next row in the result: postfix version.

Definition at line 417 of file sqldb.h.

std::vector<std::string> Dv::Sql::Command::iterator::operator * ( ) const throw (Exception)

Dereference to the current row.
NULL is represented by the std::string ``NULL''.

bool Dv::Sql::Command::iterator::operator== ( const iterator & j ) const [inline]

Compare two iterators.

Definition at line 425 of file sqldb.h.
References cmd_, and row_.

bool Dv::Sql::Command::iterator::operator!= ( const iterator & j ) const [inline]

Compare two iterators.

Definition at line 428 of file sqldb.h.
References cmd_, and row_.

std::string Dv::Sql::Command::iterator::operator() ( unsigned int c ) const throw (Exception)

Non standard operator: get c'th column of current row.
Example
MySql::Db db(...); std::string name; Sql::Command query("select * from person where name = "); query << name; if (q.exec()) for (Sql::Command::iterator i=q.begin(); i!=q.end(); ++i) cout << i(0) << "\t" << i(1) << endl;

Command& Dv::Sql::Command::iterator::command ( ) const [inline]

Return command associated with iterator.

Definition at line 447 of file sqldb.h.
References cmd_.