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Create_native_func Class Reference
Inheritance diagram for Create_native_func:
Create_func Create_func_aes_base Create_func_atan Create_func_concat Create_func_concat_ws Create_func_des_decrypt Create_func_des_encrypt Create_func_elt Create_func_encrypt Create_func_export_set Create_func_field Create_func_from_unixtime Create_func_greatest Create_func_last_insert_id Create_func_least Create_func_locate Create_func_log Create_func_make_set Create_func_master_gtid_set_wait Create_func_master_pos_wait Create_func_rand Create_func_round Create_func_unix_timestamp Create_func_year_week

List of all members.

Public Member Functions

virtual Itemcreate_func (THD *thd, LEX_STRING name, List< Item > *item_list)
virtual Itemcreate_native (THD *thd, LEX_STRING name, List< Item > *item_list)=0

Protected Member Functions

 Create_native_func ()
virtual ~Create_native_func ()

Detailed Description

Adapter for native functions with a variable number of arguments. The main use of this class is to discard the following calls: foo(expr1 AS name1, expr2 AS name2, ...) which are syntactically correct (the syntax can refer to a UDF), but semantically invalid for native functions.

Constructor & Destructor Documentation

Create_native_func::Create_native_func ( ) [inline, protected]


virtual Create_native_func::~Create_native_func ( ) [inline, protected, virtual]


Member Function Documentation

Item * Create_native_func::create_func ( THD *  thd,
List< Item > *  item_list 
) [virtual]

The builder create method. Given the function name and list or arguments, this method creates an Item that represents the function call. In case or errors, a NULL item is returned, and an error is reported. Note that the thd object may be modified by the builder. In particular, the following members/methods can be set/called, depending on the function called and the function possible side effects.

  • thd->lex->binlog_row_based_if_mixed
  • thd->lex->current_context()
  • thd->lex->safe_to_cache_query
  • thd->lex->uncacheable(UNCACHEABLE_SIDEEFFECT)
  • thd->lex->uncacheable(UNCACHEABLE_RAND)
  • thd->lex->add_time_zone_tables_to_query_tables(thd)
thdThe current thread
nameThe function name
item_listThe list of arguments to the function, can be NULL
An item representing the parsed function call, or NULL

Implements Create_func.

virtual Item* Create_native_func::create_native ( THD *  thd,
List< Item > *  item_list 
) [pure virtual]

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