#include <stddef.h>
#include <sys/types.h>
#include "lex_string.h"
#include "my_inttypes.h"
#include "my_table_map.h"
#include "mysql/udf_registration_types.h"

Classes
struct	udf_func

struct	Udf_args_extension

struct	Udf_return_value_extension

class	udf_handler

Typedefs
typedef void	udf_hash_for_each_func_t(udf_func , void )

Functions
void	udf_init_globals ()
	Initialize the UDF global structures. More...

void	udf_read_functions_table ()

void	udf_unload_udfs ()
	Deinitialize the UDF subsystem. More...

void	udf_deinit_globals ()
	Deinitialize the UDF subsystem. More...

udf_func *	find_udf (const char *name, size_t len=0, bool mark_used=false)

void	free_udf (udf_func *udf)

bool	mysql_create_function (THD thd, udf_func udf, bool if_not_exists)
	Create a user defined function. More...

bool	mysql_drop_function (THD thd, const LEX_STRING name)
	Drop a user defined function. More...

ulong	udf_hash_size (void)

void	udf_hash_rlock (void)

void	udf_hash_unlock (void)

void	udf_hash_for_each (udf_hash_for_each_func_t func, void arg)

Typedef Documentation

◆ udf_hash_for_each_func_t

typedef void udf_hash_for_each_func_t(udf_func *, void *)

Function Documentation

◆ find_udf()

udf_func * find_udf	(	const char *	name,
		size_t	len = `0`,
		bool	mark_used = `false`
	)

◆ free_udf()

void free_udf ( udf_func * udf )

◆ mysql_create_function()

bool mysql_create_function	(	THD *	thd,
		udf_func *	udf,
		bool	if_not_exists
	)

Create a user defined function.

Atomicity: The operation to create a user defined function is atomic/crash-safe. Changes to the Data-dictionary and writing event to binlog are part of the same transaction. All the changes are done as part of the same transaction or do not have any side effects on the operation failure. UDF hash is in sync with operation state. UDF hash do not contain any stale/incorrect data in case of failure. In case of crash, there won't be any discrepancy between the data-dictionary table and the binary log.

Parameters

thd	THD context.
udf	Pointer to UDF function.
if_not_exists	True if 'IF NOT EXISTS' clause was specified.

Note: Like implementations of other DDL/DML in MySQL, this function relies on the caller to close the thread tables. This is done in the end of dispatch_command().

◆ mysql_drop_function()

bool mysql_drop_function	(	THD *	thd,
		const LEX_STRING *	udf_name
	)

Drop a user defined function.

Atomicity: The operation to drop a user defined function is atomic/crash-safe. Changes to the Data-dictionary and writing event to binlog are part of the same transaction. All the changes are done as part of the same transaction or do not have any side effects on the operation failure. UDF hash is in sync with operation state. UDF hash do not contain any stale/incorrect data in case of failure. In case of crash, there won't be any discrepancy between the data-dictionary table and the binary log.

Parameters

thd	THD context.
udf_name	Name of the UDF function.

◆ udf_deinit_globals()

void udf_deinit_globals ( )

Deinitialize the UDF subsystem.

This function does the following:

Free the UDF hash.
Free the memroot allocated.
Destroy the RW mutex object.

◆ udf_hash_for_each()

void udf_hash_for_each	(	udf_hash_for_each_func_t *	func,
		void *	arg
	)

◆ udf_hash_rlock()

void udf_hash_rlock ( void )

◆ udf_hash_size()

ulong udf_hash_size ( void )

◆ udf_hash_unlock()

void udf_hash_unlock ( void )

◆ udf_init_globals()

void udf_init_globals ( )

Initialize the UDF global structures.

This is done as a separate step so that the UDF registration service can work when initializing plugins, which happens before reading the UDF table.

◆ udf_read_functions_table()

void udf_read_functions_table ( )

◆ udf_unload_udfs()

void udf_unload_udfs ( )