Create_func_arg2 Class Reference

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Collaboration diagram for Create_func_arg2:

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 ()
Protected Member Functions inherited from Create_func
	Create_func ()
virtual	~Create_func ()

Detailed Description

Adapter for functions that takes exactly two arguments.

Definition at line 127 of file item_create.cc.

Constructor & Destructor Documentation

Create_func_arg2::Create_func_arg2 ( )

inlineprotected

Constructor.

Definition at line 143 of file item_create.cc.

virtual Create_func_arg2::~Create_func_arg2 ( )

inlineprotectedvirtual

Destructor.

Definition at line 145 of file item_create.cc.

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, Create_func_aes_decrypt, Create_func_aes_encrypt, and Create_func_addtime.

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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.

Definition at line 2934 of file item_create.cc.

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

• sql/item_create.cc