All accesses to THD variables and functions are defined in this header file. More...

#include <mysqld_error.h>
#include "sql/conn_handler/channel_info.h"
#include "sql/conn_handler/connection_handler_manager.h"

Classes
struct	Connection_handler_functions
	This structure must be populated by plugins which implement connection handlers and passed as an argument to my_connection_handler_set() in order to activate the connection handler. More...

Typedefs
typedef bool(*	add_connection_t) (Channel_info *channel_info)
	Called by the server when a new client connects. More...

typedef void(*	end_t) (void)
	Called by the server when the connection handler is destroyed. More...

typedef void()	do_thd_impl_uint64(THD *, uint64)

Functions
THD *	create_thd (Channel_info *channel_info)

void	destroy_channel_info (Channel_info *channel_info)

bool	connection_events_loop_aborted ()

void	dec_connection_count ()

void	inc_thread_created ()

void	thd_lock_thread_count ()

void	thd_unlock_thread_count ()

void	do_for_all_thd (do_thd_impl_uint64, uint64)

void *	thd_get_scheduler_data (THD *thd)
	Get reference to scheduler data object. More...

void	thd_set_scheduler_data (THD thd, void data)
	Set reference to Scheduler data object for THD object. More...

PSI_thread *	thd_get_psi (THD *thd)
	Get reference to Performance Schema object for THD object. More...

void	thd_set_psi (THD thd, PSI_thread psi)
	Set reference to Performance Schema object for THD object. More...

void	thd_set_killed (THD *thd)
	Set the state on connection to killed. More...

void	thd_clear_errors (THD *thd)
	Clear errors from the previous THD. More...

void	thd_close_connection (THD *thd)
	Close the socket used by this connection. More...

THD *	thd_get_current_thd ()
	Get current THD object from thread local data. More...

void	thd_lock_data (THD *thd)
	Lock data that needs protection in THD object. More...

void	thd_unlock_data (THD *thd)
	Unlock data that needs protection in THD object. More...

bool	thd_is_transaction_active (THD *thd)
	Support method to check if connection has already started transaction. More...

bool	thd_in_active_multi_stmt_transaction (const THD *)
	Predicate for determining if connection is in active multi-statement transaction. More...

int	thd_connection_has_data (THD *thd)
	Check if there is buffered data on the socket representing the connection. More...

void	thd_set_net_read_write (THD *thd, uint val)
	Set reading/writing on socket, used by SHOW PROCESSLIST. More...

uint	thd_get_net_read_write (THD *thd)
	Get reading/writing on socket from THD object. More...

void	thd_set_not_killable (THD *thd)
	Mark the THD as not killable as it is not currently used by a thread. More...

ulong	thd_get_net_wait_timeout (THD *thd)
	Get net_wait_timeout for THD object. More...

my_socket	thd_get_fd (THD *thd)
	Get socket file descriptor for this connection. More...

MYSQL_SOCKET	thd_get_mysql_socket (THD *)
	Get MYSQL_SOCKET struct for this connection. More...

void	thd_store_globals (THD *thd)
	Set thread specific environment required for thd cleanup in thread pool. More...

bool	thd_check_connection_admin_privilege (THD *thd)

bool	do_command (THD *thd)
	Read one command from connection and execute it (query or simple command). More...

bool	thd_prepare_connection (THD *thd)

void	mysql_audit_release (THD *thd)
	Release any resources associated with the current thd. More...

bool	thd_connection_alive (THD *thd)

void	close_connection (THD *thd, uint sql_errno, bool server_shutdown, bool generate_event)
	Close a connection. More...

void	end_connection (THD *thd)

void	reset_thread_globals (THD *thd)
	Reset thread globals associated. More...

ulong	get_max_connections (void)
	Get max number of connections. More...

my_thread_attr_t *	get_connection_attrib (void)
	Get thread attributes for connection threads. More...

void	increment_aborted_connects ()

longlong	get_incoming_connects ()

longlong	get_aborted_connects ()

Detailed Description

All accesses to THD variables and functions are defined in this header file.

Typedef Documentation

◆ add_connection_t

typedef bool(* add_connection_t) (Channel_info *channel_info)

Called by the server when a new client connects.

Parameters

channel_info Pointer to object containing information about the new connection.

Return values

true	failure
false	success

◆ do_thd_impl_uint64

typedef void() do_thd_impl_uint64(THD *, uint64)

◆ end_t

typedef void(* end_t) (void)

Called by the server when the connection handler is destroyed.

Function Documentation

◆ close_connection()

void close_connection	(	THD *	thd,
		uint	sql_errno,
		bool	server_shutdown,
		bool	generate_event
	)

Close a connection.

Parameters

thd	Thread handle.
sql_errno	The error code to send before disconnect.
server_shutdown	True for a server shutdown
generate_event	Generate Audit API disconnect event.

Note: For the connection that is doing shutdown, this is called twice

◆ connection_events_loop_aborted()

bool connection_events_loop_aborted ( )

inline

◆ create_thd()

THD * create_thd ( Channel_info * channel_info )

◆ dec_connection_count()

void dec_connection_count ( )

◆ destroy_channel_info()

void destroy_channel_info ( Channel_info * channel_info )

◆ do_for_all_thd()

void do_for_all_thd	(	do_thd_impl_uint64	f,
		uint64	v
	)

◆ end_connection()

void end_connection ( THD * thd )

◆ get_aborted_connects()

longlong get_aborted_connects ( )

◆ get_connection_attrib()

my_thread_attr_t * get_connection_attrib ( void )

Get thread attributes for connection threads.

Returns the server connection attribute.

Return values

Reference to thread attribute for connection threads

◆ get_incoming_connects()

longlong get_incoming_connects ( )

◆ get_max_connections()

ulong get_max_connections ( void )

Get max number of connections.

Return values

Max	number of connections for MySQL Server

◆ inc_thread_created()

void inc_thread_created ( )

◆ increment_aborted_connects()

void increment_aborted_connects ( )

◆ mysql_audit_release()

void mysql_audit_release ( THD * thd )

Release any resources associated with the current thd.

Parameters

[in] thd Current thread

◆ reset_thread_globals()

void reset_thread_globals ( THD * thd )

Reset thread globals associated.

Parameters

thd	THD object

◆ thd_check_connection_admin_privilege()

bool thd_check_connection_admin_privilege ( THD * thd )

◆ thd_clear_errors()

void thd_clear_errors ( THD * thd )

Clear errors from the previous THD.

Parameters

thd	THD object

◆ thd_close_connection()

void thd_close_connection ( THD * thd )

Close the socket used by this connection.

Parameters

thd	THD object

Note: Expects lock on thd->LOCK_thd_data.

◆ thd_connection_alive()

bool thd_connection_alive ( THD * thd )

◆ thd_connection_has_data()

int thd_connection_has_data ( THD * thd )

Check if there is buffered data on the socket representing the connection.

Parameters

thd	THD object

◆ thd_get_current_thd()

THD * thd_get_current_thd ( )

Get current THD object from thread local data.

Return values

The	THD object for the thread, NULL if not connection thread

◆ thd_get_fd()

my_socket thd_get_fd ( THD * thd )

Get socket file descriptor for this connection.

Parameters

thd	THD object

Return values

Socket of the connection

◆ thd_get_mysql_socket()

MYSQL_SOCKET thd_get_mysql_socket ( THD * thd )

Get MYSQL_SOCKET struct for this connection.

Parameters

thd	THD object

Return values

MYSQL_SOCKET struct of the connection

◆ thd_get_net_read_write()

uint thd_get_net_read_write ( THD * thd )

Get reading/writing on socket from THD object.

Parameters

thd	THD object

Return values

net.reading_or_writing value for thread on THD.

◆ thd_get_net_wait_timeout()

ulong thd_get_net_wait_timeout ( THD * thd )

Get net_wait_timeout for THD object.

Parameters

thd	THD object

Return values

net_wait_timeout value for thread on THD

◆ thd_get_psi()

PSI_thread * thd_get_psi ( THD * thd )

Get reference to Performance Schema object for THD object.

Parameters

thd	THD object

Return values

Performance schema object for thread on THD

◆ thd_get_scheduler_data()

void * thd_get_scheduler_data ( THD * thd )

Get reference to scheduler data object.

Parameters

thd	THD object

Return values

Scheduler data object on THD

◆ thd_in_active_multi_stmt_transaction()

bool thd_in_active_multi_stmt_transaction ( const THD * thd )

Predicate for determining if connection is in active multi-statement transaction.

◆ thd_is_transaction_active()

bool thd_is_transaction_active ( THD * thd )

Support method to check if connection has already started transaction.

Parameters

thd	Current thread

Return values

true	if connection already started transaction

◆ thd_lock_data()

void thd_lock_data ( THD * thd )

Lock data that needs protection in THD object.

Parameters

thd	THD object

◆ thd_lock_thread_count()

void thd_lock_thread_count ( )

◆ thd_prepare_connection()

bool thd_prepare_connection ( THD * thd )

◆ thd_set_killed()

void thd_set_killed ( THD * thd )

Set the state on connection to killed.

Parameters

thd	THD object

◆ thd_set_net_read_write()

void thd_set_net_read_write	(	THD *	thd,
		uint	val
	)

Set reading/writing on socket, used by SHOW PROCESSLIST.

Parameters

thd	THD object
val	Value to set it to (0 or 1)

◆ thd_set_not_killable()

void thd_set_not_killable ( THD * thd )

Mark the THD as not killable as it is not currently used by a thread.

Parameters

thd	THD object

◆ thd_set_psi()

void thd_set_psi	(	THD *	thd,
		PSI_thread *	psi
	)

Set reference to Performance Schema object for THD object.

Parameters

thd	THD object
psi	Performance schema object for thread

◆ thd_set_scheduler_data()

void thd_set_scheduler_data	(	THD *	thd,
		void *	data
	)

Set reference to Scheduler data object for THD object.

Parameters

thd	THD object
data	Scheduler data object to set on THD

◆ thd_store_globals()

void thd_store_globals ( THD * thd )

Set thread specific environment required for thd cleanup in thread pool.

Parameters

thd	THD object

◆ thd_unlock_data()

void thd_unlock_data ( THD * thd )

Unlock data that needs protection in THD object.

Parameters

thd	THD object

◆ thd_unlock_thread_count()

void thd_unlock_thread_count ( )

Classes

Typedefs

Functions

Detailed Description

Typedef Documentation

◆ add_connection_t

◆ do_thd_impl_uint64

◆ end_t

Function Documentation

◆ close_connection()

◆ connection_events_loop_aborted()

◆ create_thd()

◆ dec_connection_count()

◆ destroy_channel_info()

◆ do_for_all_thd()

◆ end_connection()

◆ get_aborted_connects()

◆ get_connection_attrib()

◆ get_incoming_connects()

◆ get_max_connections()

◆ inc_thread_created()

◆ increment_aborted_connects()

◆ mysql_audit_release()

◆ reset_thread_globals()

◆ thd_check_connection_admin_privilege()

◆ thd_clear_errors()

◆ thd_close_connection()

◆ thd_connection_alive()

◆ thd_connection_has_data()

◆ thd_get_current_thd()

◆ thd_get_fd()

◆ thd_get_mysql_socket()

◆ thd_get_net_read_write()

◆ thd_get_net_wait_timeout()

◆ thd_get_psi()

◆ thd_get_scheduler_data()

◆ thd_in_active_multi_stmt_transaction()

◆ thd_is_transaction_active()

◆ thd_lock_data()

◆ thd_lock_thread_count()

◆ thd_prepare_connection()

◆ thd_set_killed()

◆ thd_set_net_read_write()

◆ thd_set_not_killable()

◆ thd_set_psi()

◆ thd_set_scheduler_data()

◆ thd_store_globals()

◆ thd_unlock_data()

◆ thd_unlock_thread_count()