gum::learning::NanodbcParser< ALLOC > Class Template Reference

Class for parsing SQL results using Nanodbc. More...

#include <nanodbcParser.h>

Public Member Functions
Constructors / Destructors
	NanodbcParser (const ALLOC< std::string > &alloc=ALLOC< std::string >())
	Default constructor: create a parser without being connected. More...
	NanodbcParser (nanodbc::connection &connection, const std::string &query, const ALLOC< std::string > &alloc=ALLOC< std::string >())
	constructor that executes an SQL query if the connection is active More...
virtual	~NanodbcParser ()
	destructor More...
Accessors / Modifiers
bool	next ()
	Gets the next line of the SQL stream and parses it. More...
const std::vector< std::string, ALLOC< std::string > > &	current () const
	returns the current parsed line. More...
std::size_t	nbLine () const
	returns the current line number within the query More...
std::size_t	nbColumns () const
	returns the number of columns in the query result More...
std::string	columnName (const std::size_t i) const
	returns the name of the ith column More...
void	useNewQuery (nanodbc::connection &connexion, const std::string &query)
	start a new query More...

Public Types
using	allocator_type = ALLOC< std::string >
	type for the allocators passed in arguments of methods More...

Detailed Description

template<template< typename > class ALLOC = std::allocator>
class gum::learning::NanodbcParser< ALLOC >

Class for parsing SQL results using Nanodbc.

This class should probably not be used by itself. It is essentially used by Class DBInitializerFromSQL.

Definition at line 54 of file nanodbcParser.h.

Member Typedef Documentation

allocator_type

template<template< typename > class ALLOC = std::allocator>

using gum::learning::NanodbcParser< ALLOC >::allocator_type = ALLOC<std::string>

type for the allocators passed in arguments of methods

Definition at line 58 of file nanodbcParser.h.

Constructor & Destructor Documentation

NanodbcParser() [1/2]

template<template< typename > class ALLOC = std::allocator>

gum::learning::NanodbcParser< ALLOC >::NanodbcParser

(

const ALLOC< std::string > &

alloc = ALLOC< std::string >()

)

Default constructor: create a parser without being connected.

NanodbcParser() [2/2]

template<template< typename > class ALLOC = std::allocator>

gum::learning::NanodbcParser< ALLOC >::NanodbcParser	(	nanodbc::connection &	connection,
		const std::string &	query,
		const ALLOC< std::string > &	alloc = ALLOC< std::string >()
	)

constructor that executes an SQL query if the connection is active

Parameters

connection	a nanODBC connection to a SQL database
query	a string containing an SQL query
alloc	The allocator that will be used by all methods

~NanodbcParser()

template<template< typename > class ALLOC = std::allocator>

virtual gum::learning::NanodbcParser< ALLOC >::~NanodbcParser ( )

virtual

destructor

Member Function Documentation

columnName()

template<template< typename > class ALLOC = std::allocator>

std::string gum::learning::NanodbcParser< ALLOC >::columnName

(

const std::size_t

i

)

const

returns the name of the ith column

current()

template<template< typename > class ALLOC = std::allocator>

const std::vector<std::string,ALLOC<std::string> >& gum::learning::NanodbcParser< ALLOC >::current

(

)

const

returns the current parsed line.

Exceptions

NullElement

is raised if there is no data.

nbColumns()

template<template< typename > class ALLOC = std::allocator>

std::size_t gum::learning::NanodbcParser< ALLOC >::nbColumns

(

)

const

returns the number of columns in the query result

nbLine()

template<template< typename > class ALLOC = std::allocator>

std::size_t gum::learning::NanodbcParser< ALLOC >::nbLine

(

)

const

returns the current line number within the query

next()

template<template< typename > class ALLOC = std::allocator>

bool gum::learning::NanodbcParser< ALLOC >::next

(

)

Gets the next line of the SQL stream and parses it.

Returns

false if there is no next line.

useNewQuery()

template<template< typename > class ALLOC = std::allocator>

void gum::learning::NanodbcParser< ALLOC >::useNewQuery	(	nanodbc::connection &	connexion,
		const std::string &	query
	)

start a new query

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The documentation for this class was generated from the following file:

• agrum/learning/database/nanodbcParser.h