Session_sysvars_tracker::vars_list Class Reference

Public Member Functions
	vars_list (const CHARSET_INFO *char_set)
void	claim_memory_ownership (bool claim)
	~vars_list ()
sysvar_node_st *	search (sysvar_node_st *node, const LEX_CSTRING &tmp)
sysvar_map::iterator	begin () const
sysvar_map::iterator	end () const
const CHARSET_INFO *	char_set () const
bool	insert (sysvar_node_st *node, const LEX_CSTRING &var)
	Inserts the variable to be tracked into m_registered_sysvars hash. More...
void	reset ()
bool	update (vars_list *from, THD *thd)
	This function is used to update the members of one vars_list object with the members from the other. More...
bool	parse_var_list (THD *thd, LEX_STRING var_list, bool throw_error, const CHARSET_INFO *char_set, bool session_created)
	Parse the specified system variables list. More...

Private Types
using	sysvar_map = collation_unordered_map< std::string, unique_ptr_my_free< sysvar_node_st > >
	Registered system variables. More...

Private Member Functions
void	init (const CHARSET_INFO *char_set)
void	free_hash ()
sysvar_node_st *	search (const uchar *token, size_t length)

Private Attributes
std::unique_ptr< sysvar_map >	m_registered_sysvars
char *	variables_list
bool	track_all
	The boolean which when set to true, signifies that every variable is to be tracked. More...
const CHARSET_INFO *	m_char_set

Member Typedef Documentation

sysvar_map

using Session_sysvars_tracker::vars_list::sysvar_map = collation_unordered_map<std::string, unique_ptr_my_free<sysvar_node_st> >

private

Registered system variables.

(@session_track_system_variables) A hash to store the name of all the system variables specified by the user.

Constructor & Destructor Documentation

vars_list()

Session_sysvars_tracker::vars_list::vars_list ( const CHARSET_INFO *  char_set )

inline

~vars_list()

Session_sysvars_tracker::vars_list::~vars_list ( )

inline

Member Function Documentation

begin()

sysvar_map::iterator Session_sysvars_tracker::vars_list::begin ( void  ) const

inline

char_set()

const CHARSET_INFO * Session_sysvars_tracker::vars_list::char_set ( ) const

inline

claim_memory_ownership()

void Session_sysvars_tracker::vars_list::claim_memory_ownership ( bool  claim )

inline

end()

sysvar_map::iterator Session_sysvars_tracker::vars_list::end ( void  ) const

inline

free_hash()

void Session_sysvars_tracker::vars_list::free_hash ( )

inlineprivate

init()

void Session_sysvars_tracker::vars_list::init ( const CHARSET_INFO *  char_set )

inlineprivate

insert()

bool Session_sysvars_tracker::vars_list::insert	(	sysvar_node_st *	node,
		const LEX_CSTRING &	var
	)

Inserts the variable to be tracked into m_registered_sysvars hash.

@param node Node to be inserted. @param var LEX_STRING which has the name of variable.

@return false success true error

parse_var_list()

bool Session_sysvars_tracker::vars_list::parse_var_list	(	THD *	thd,
		LEX_STRING	var_list,
		bool	throw_error,
		const CHARSET_INFO *	char_set,
		bool	session_created
	)

Parse the specified system variables list.

While parsing raise warning/error on invalid/duplicate entries.

In case of duplicate entry ER_DUP_LIST_ENTRY is raised. In case of invalid entry a warning is raised per invalid entry. This is done in order to handle 'potentially' valid system variables from uninstalled plugins which might get installed in future.

Value of @session_track_system_variables is initially put into variables_list. This string is used to update the hash with valid system variables.

Parameters

thd	The thd handle.
var_list	System variable list.
throw_error	bool when set to true, returns an error in case of invalid/duplicate values.
char_set	character set information used for string manipulations.
session_created	bool variable which says if the parse is already executed once. The mutex on variables is not acquired if this variable is false.

Returns

true Error false Success

reset()

void Session_sysvars_tracker::vars_list::reset

(

void

)

search() [1/2]

sysvar_node_st * Session_sysvars_tracker::vars_list::search ( const uchar *  token, size_t  length  )

inlineprivate

search() [2/2]

sysvar_node_st * Session_sysvars_tracker::vars_list::search ( sysvar_node_st *  node, const LEX_CSTRING &  tmp  )

inline

update()

bool Session_sysvars_tracker::vars_list::update	(	vars_list *	from,
		THD *	thd
	)

This function is used to update the members of one vars_list object with the members from the other.

@param from Source vars_list object. @param thd THD handle to retrieve the charset in use.

@return true if the m_registered_sysvars hash has any records. Else the value of track_all.

Member Data Documentation

m_char_set

const CHARSET_INFO* Session_sysvars_tracker::vars_list::m_char_set

private

m_registered_sysvars

std::unique_ptr<sysvar_map> Session_sysvars_tracker::vars_list::m_registered_sysvars

private

track_all

bool Session_sysvars_tracker::vars_list::track_all

private

The boolean which when set to true, signifies that every variable is to be tracked.

variables_list

char* Session_sysvars_tracker::vars_list::variables_list

private

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

• sql/session_tracker.cc