Create_func_arg3 Class Reference

Inheritance diagram for Create_func_arg3:

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, Item *arg3)=0
Protected Member Functions
	Create_func_arg3 ()
virtual	~Create_func_arg3 ()

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Detailed Description

Adapter for functions that takes exactly three arguments.

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Constructor & Destructor Documentation

Create_func_arg3::Create_func_arg3

(

)

[inline, protected]

Constructor.

virtual Create_func_arg3::~Create_func_arg3

(

)

[inline, protected, virtual]

Destructor.

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Member Function Documentation

virtual Item* Create_func_arg3::create	(	THD *	thd,
		Item *	arg1,
		Item *	arg2,
		Item *	arg3
	)		[pure virtual]

Builder method, with three arguments.

Parameters:

thd	The current thread
arg1	The first argument of the function
arg2	The second argument of the function
arg3	The third argument of the function

Returns:

An item representing the function call

Implemented in Create_func_xml_update, Create_func_substr_index, Create_func_rpad, Create_func_maketime, Create_func_lpad, Create_func_convert_tz, and Create_func_conv.

Item * Create_func_arg3::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