Create_func_arg2 Class Reference

Inheritance diagram for Create_func_arg2:

List of all members.

Public Member Functions
virtual Item *	create_func (THD *thd, LEX_STRING name, List< Item > *item_list)
virtual Item *	create (THD *thd, Item *arg1, Item *arg2)=0
Protected Member Functions
	Create_func_arg2 ()
virtual	~Create_func_arg2 ()

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Detailed Description

Adapter for functions that takes exactly two arguments.

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Constructor & Destructor Documentation

Create_func_arg2::Create_func_arg2

(

)

[inline, protected]

Constructor.

virtual Create_func_arg2::~Create_func_arg2

(

)

[inline, protected, virtual]

Destructor.

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Member Function Documentation

virtual Item* Create_func_arg2::create	(	THD *	thd,
		Item *	arg1,
		Item *	arg2
	)		[pure virtual]

Builder method, with two arguments.

Parameters:

thd	The current thread
arg1	The first argument of the function
arg2	The second argument of the function

Returns:

An item representing the function call

Implemented in Create_func_xml_extractvalue, Create_func_timediff, Create_func_time_format, Create_func_subtime, Create_func_strcmp, Create_func_str_to_date, Create_func_sha2, Create_func_pow, Create_func_period_diff, Create_func_period_add, Create_func_nullif, Create_func_name_const, Create_func_makedate, Create_func_like_range_max, Create_func_like_range_min, Create_func_instr, Create_func_ifnull, Create_func_gtid_subset, Create_func_gtid_subtract, Create_func_get_lock, Create_func_find_in_set, Create_func_encode, Create_func_decode, Create_func_datediff, Create_func_date_format, Create_func_benchmark, and Create_func_addtime.

Item * Create_func_arg2::create_func	(	THD *	thd,
		LEX_STRING	name,
		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)

Parameters:

thd	The current thread
name	The function name
item_list	The list of arguments to the function, can be NULL

Returns:

An item representing the parsed function call, or NULL

Implements Create_func.

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

• item_create.cc