Service for turning. More...

#include <udf_registration.h>

Public Attributes
mysql_service_status_t(*	udf_register )(const char *func_name, enum Item_result return_type, Udf_func_any func, Udf_func_init init_func, Udf_func_deinit deinit_func, Udf_func_add add_func, Udf_func_clear clear_func)
	Registers an aggregate UDF function with a given name. More...

mysql_service_status_t(*	udf_unregister )(const char name, int was_present)
	Unregisters an aggregate UDF function with a given name. More...

Detailed Description

Service for turning.

Member Data Documentation

◆ udf_register

mysql_service_status_t(* s_mysql_udf_registration_aggregate::udf_register) (const char *func_name, enum Item_result return_type, Udf_func_any func, Udf_func_init init_func, Udf_func_deinit deinit_func, Udf_func_add add_func, Udf_func_clear clear_func)

Registers an aggregate UDF function with a given name.

The name must be unique. Does not store in any table, just updates the global function list. Plugins/components need to handle registration deregistration during their initialization and deinitialization. You can use udf_registration::unregister to unregister the function.

See also: udf_registration

Parameters

name	name of the function
return_type	return type.
func	function to call
init_func	function to call at query start
deinit_func	function to call at query cleanup
add_func	function to call at adding a row to the current aggregate
clear_func	function to call at the start of a new aggregate group

Returns: Status of performed operation

Return values

false	success
true	failure

◆ udf_unregister

mysql_service_status_t(* s_mysql_udf_registration_aggregate::udf_unregister) (const char *name, int *was_present)

Unregisters an aggregate UDF function with a given name.

Does not store in any table, just updates the global function list. Plugins/components need to handle registration deregistration during their initialization and deinitialization.

Currently it's a synonym for udf_registration::udf_unregister.