_Wolframe::db::BaseStatement Class Reference

Implements basic parsing of the Wolframe SQL statement with placeholders, derived classes can steer how the SQL string is converted to native format. More...

#include <baseStatement.hpp>

Inheritance diagram for _Wolframe::db::BaseStatement:

Public Types
enum	{ MaxNofParams = 32 }

Public Member Functions
	BaseStatement ()
	BaseStatement (const BaseStatement &o)
	BaseStatement (const std::string &stmtStr)
virtual void	init (const std::string &stmtStr)
	Set new SQL statement. More...
virtual void	clear ()
	Clear current statement. More...
virtual void	substitute (bool checkForMissingPlaceholders=true)
	Trigger substitution (nativeSQL is valid after this call and not before!) More...
virtual void	bind (const unsigned int idx, const types::Variant &value)
	Binds parameter at position idx with variant data in the format with Wolframe placeholders. More...
virtual const std::string	originalSQL () const
	Returns the SQL statement as passed down to the database layer. More...
virtual const std::string	nativeSQL () const
	Returns the SQL statement with the native database placeholders or the data filled in (this is up to the derived classes). More...
Public Member Functions inherited from _Wolframe::db::Statement
virtual	~Statement ()
virtual const std::string	replace (const unsigned int idx) const =0
	Funtion called when the placeholder should be put into the final string (this is either for subsituting data or rewrite placeholders to native syntax) More...

Protected Attributes
std::string	m_stmtStr
	The original SQL. More...
unsigned int	m_maxParam
	The maximum number of parsed placeholders so far. More...

Private Types
typedef std::pair< unsigned int, std::string >	Element

Private Member Functions
void	parse ()

Private Attributes
std::vector< Element >	m_data
	Remembers positions and parts of SQL snippets. More...
std::string	m_nativeStmt
	The SQL statement as understood by the database. More...
std::bitset< MaxNofParams >	m_usedIdx
	Remembers the indexes used in the SQL statement. More...
std::bitset< MaxNofParams >	m_setIdx
	Remembers the placeholders bound to actual data. More...

Detailed Description

Implements basic parsing of the Wolframe SQL statement with placeholders, derived classes can steer how the SQL string is converted to native format.

Member Typedef Documentation

typedef std::pair<unsigned int, std::string> _Wolframe::db::BaseStatement::Element

private

Member Enumeration Documentation

anonymous enum

Enumerator
MaxNofParams

Constructor & Destructor Documentation

_Wolframe::db::BaseStatement::BaseStatement

(

)

_Wolframe::db::BaseStatement::BaseStatement

(

const BaseStatement &

o

)

_Wolframe::db::BaseStatement::BaseStatement ( const std::string &  stmtStr )

explicit

Member Function Documentation

virtual void _Wolframe::db::BaseStatement::bind ( const unsigned int  idx, const types::Variant &  arg  )

virtual

Binds parameter at position idx with variant data in the format with Wolframe placeholders.

Implements _Wolframe::db::Statement.

Reimplemented in _Wolframe::db::SubstitutingStatement.

virtual void _Wolframe::db::BaseStatement::clear ( )

virtual

Clear current statement.

Implements _Wolframe::db::Statement.

Reimplemented in _Wolframe::db::SubstitutingStatement.

virtual void _Wolframe::db::BaseStatement::init ( const std::string &  stmtStr )

virtual

Set new SQL statement.

Implements _Wolframe::db::Statement.

Reimplemented in _Wolframe::db::SubstitutingStatement.

virtual const std::string _Wolframe::db::BaseStatement::nativeSQL ( ) const

virtual

Returns the SQL statement with the native database placeholders or the data filled in (this is up to the derived classes).

Implements _Wolframe::db::Statement.

virtual const std::string _Wolframe::db::BaseStatement::originalSQL ( ) const

virtual

Returns the SQL statement as passed down to the database layer.

Implements _Wolframe::db::Statement.

void _Wolframe::db::BaseStatement::parse ( )

private

virtual void _Wolframe::db::BaseStatement::substitute ( bool  checkForMissingPlaceholders = true )

virtual

Trigger substitution (nativeSQL is valid after this call and not before!)

Parameters

[in]

checkForMissingPlaceholders

whether the function should already check the validity and cardinality of the placeholders in the SQL statement

Implements _Wolframe::db::Statement.

Member Data Documentation

std::vector<Element> _Wolframe::db::BaseStatement::m_data

private

Remembers positions and parts of SQL snippets.

unsigned int _Wolframe::db::BaseStatement::m_maxParam

protected

The maximum number of parsed placeholders so far.

std::string _Wolframe::db::BaseStatement::m_nativeStmt

private

The SQL statement as understood by the database.

std::bitset<MaxNofParams> _Wolframe::db::BaseStatement::m_setIdx

private

Remembers the placeholders bound to actual data.

std::string _Wolframe::db::BaseStatement::m_stmtStr

protected

The original SQL.

std::bitset<MaxNofParams> _Wolframe::db::BaseStatement::m_usedIdx

private

Remembers the indexes used in the SQL statement.

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

• include/database/baseStatement.hpp