Inheritance diagram for Item_insert_value:

Collaboration diagram for Item_insert_value:

Public Member Functions
	Item_insert_value (Name_resolution_context context_arg, Item a)
bool	eq (const Item *item, bool binary_cmp) const
bool	fix_fields (THD , Item *)
virtual void	print (String *str, enum_query_type query_type)
type_conversion_status	save_in_field (Field *field_arg, bool no_conversions)
table_map	used_tables () const
bool	walk (Item_processor processor, bool walk_subquery, uchar *args)
Public Member Functions inherited from Item_field
	Item_field (Name_resolution_context context_arg, const char db_arg, const char table_name_arg, const char field_name_arg)
	Item_field (THD thd, Item_field item)
	Item_field (THD thd, Name_resolution_context context_arg, Field *field)
	Item_field (Field *field)
enum Type	type () const
double	val_real ()
longlong	val_int ()
longlong	val_time_temporal ()
longlong	val_date_temporal ()
my_decimal *	val_decimal (my_decimal *)
String *	val_str (String *)
double	val_result ()
longlong	val_int_result ()
longlong	val_time_temporal_result ()
longlong	val_date_temporal_result ()
String *	str_result (String *tmp)
my_decimal *	val_decimal_result (my_decimal *)
bool	val_bool_result ()
bool	is_null_result ()
bool	send (Protocol protocol, String str_arg)
void	reset_field (Field *f)
void	make_field (Send_field *tmp_field)
void	save_org_in_field (Field *field)
virtual table_map	resolved_used_tables () const
enum Item_result	result_type () const
enum Item_result	numeric_context_result_type () const
Item_result	cast_to_int_type () const
enum_field_types	field_type () const
enum_monotonicity_info	get_monotonicity_info () const
longlong	val_int_endpoint (bool left_endp, bool *incl_endp)
Field *	get_tmp_table_field ()
Field *	tmp_table_field (TABLE *t_arg)
bool	get_date (MYSQL_TIME *ltime, uint fuzzydate)
bool	get_date_result (MYSQL_TIME *ltime, uint fuzzydate)
bool	get_time (MYSQL_TIME *ltime)
bool	get_timeval (struct timeval tm, int warnings)
bool	is_null ()
void	update_null_value ()
Item *	get_tmp_table_item (THD *thd)
bool	collect_item_field_processor (uchar *arg)
bool	add_field_to_set_processor (uchar *arg)
bool	remove_column_from_bitmap (uchar *arg)
bool	find_item_in_field_list_processor (uchar *arg)
bool	register_field_in_read_map (uchar *arg)
bool	check_partition_func_processor (uchar *int_arg)
void	cleanup ()
Item_equal *	find_item_equal (COND_EQUAL *cond_equal)
bool	subst_argument_checker (uchar **arg)
Item *	equal_fields_propagator (uchar *arg)
bool	set_no_const_sub (uchar *arg)
Item *	replace_equal_field (uchar *arg)
uint32	max_disp_length ()
Item_field *	field_for_view_update ()
Item *	safe_charset_converter (const CHARSET_INFO *tocs)
int	fix_outer_field (THD thd, Field field, Item *reference)
virtual Item *	update_value_transformer (uchar *select_arg)
virtual bool	item_field_by_name_analyzer (uchar **arg)
virtual Item *	item_field_by_name_transformer (uchar *arg)
bool	is_outer_field () const
Field::geometry_type	get_geometry_type () const
const CHARSET_INFO *	charset_for_protocol (void) const
void	dbug_print ()
bool	push_to_non_agg_fields (st_select_lex *select_lex)
	Pushes the item to select_lex.non_agg_fields() and updates its marker.
Public Member Functions inherited from Item_ident
	Item_ident (Name_resolution_context context_arg, const char db_name_arg, const char table_name_arg, const char field_name_arg)
	Item_ident (THD thd, Item_ident item)
const char *	full_name () const
virtual void	fix_after_pullout (st_select_lex parent_select, st_select_lex removed_select)
bool	remove_dependence_processor (uchar *arg)
virtual bool	change_context_processor (uchar *cntx)
Public Member Functions inherited from Item
	Item (THD thd, Item item)
void	rename (char *new_name)
void	init_make_field (Send_field *tmp_field, enum enum_field_types type)
virtual Field *	make_string_field (TABLE *table)
void	quick_fix_field ()
type_conversion_status	save_in_field_no_warnings (Field *field, bool no_conversions)
virtual type_conversion_status	save_safe_in_field (Field *field)
enum Item_result	temporal_with_date_as_number_result_type () const
virtual enum_field_types	string_field_type () const
longlong	val_temporal_by_field_type ()
longlong	val_temporal_with_round (enum_field_types type, uint8 dec)
ulonglong	val_uint ()
virtual String *	val_str_ascii (String *str)
virtual bool	val_bool ()
virtual String *	val_nodeset (String *)
type_conversion_status	save_time_in_field (Field *field)
type_conversion_status	save_date_in_field (Field *field)
type_conversion_status	save_str_value_in_field (Field field, String result)
virtual table_map	not_null_tables () const
virtual bool	basic_const_item () const
virtual Item *	clone_item ()
virtual cond_result	eq_cmp_result () const
uint	float_length (uint decimals_par) const
virtual uint	decimal_precision () const
int	decimal_int_part () const
virtual uint	time_precision ()
virtual uint	datetime_precision ()
virtual bool	const_item () const
virtual bool	const_during_execution () const
void	print_item_w_name (String *, enum_query_type query_type)
void	print_for_order (String *str, enum_query_type query_type, bool used_alias)
virtual void	update_used_tables ()
virtual void	split_sum_func (THD *thd, Ref_ptr_array ref_pointer_array, List< Item > &fields)
void	split_sum_func2 (THD thd, Ref_ptr_array ref_pointer_array, List< Item > &fields, Item *ref, bool skip_registered)
virtual void	top_level_item ()
virtual void	set_result_field (Field *field)
virtual bool	is_result_field ()
virtual bool	is_bool_func ()
virtual void	save_in_result_field (bool no_conversions)
virtual void	no_rows_in_result ()
virtual Item *	copy_or_same (THD *thd)
virtual Item *	copy_andor_structure (THD *thd, bool real_items=false)
virtual Item *	real_item ()
virtual const CHARSET_INFO *	compare_collation ()
virtual Item *	transform (Item_transformer transformer, uchar *arg)
virtual Item *	compile (Item_analyzer analyzer, uchar *arg_p, Item_transformer transformer, uchar arg_t)
virtual void	traverse_cond (Cond_traverser traverser, void *arg, traverse_order order)
virtual bool	intro_version (uchar *int_arg)
virtual bool	remove_fixed (uchar *arg)
virtual bool	cleanup_processor (uchar *arg)
virtual bool	reset_query_id_processor (uchar *query_id_arg)
virtual bool	find_item_processor (uchar *arg)
virtual bool	inform_item_in_cond_of_tab (uchar *join_tab_index)
virtual bool	clean_up_after_removal (uchar *arg)
virtual bool	cache_const_expr_analyzer (uchar **arg)
virtual Item *	cache_const_expr_transformer (uchar *arg)
virtual bool	equality_substitution_analyzer (uchar **arg)
virtual Item *	equality_substitution_transformer (uchar *arg)
virtual bool	explain_subquery_checker (uchar **arg)
virtual Item *	explain_subquery_propagator (uchar *arg)
virtual bool	check_valid_arguments_processor (uchar *bool_arg)
virtual bool	find_function_processor (uchar *arg)
virtual Item *	this_item ()
virtual const Item *	this_item () const
virtual Item **	this_item_addr (THD thd, Item *addr_arg)
virtual uint	cols ()
virtual Item *	element_index (uint i)
virtual Item **	addr (uint i)
virtual bool	check_cols (uint c)
virtual bool	null_inside ()
virtual void	bring_value ()
Field *	tmp_table_field_from_field_type (TABLE *table, bool fixed_length)
virtual Item *	neg_transformer (THD *thd)
void	delete_self ()
virtual bool	is_splocal ()
virtual Settable_routine_parameter *	get_settable_routine_parameter ()
bool	is_temporal_with_date () const
bool	is_temporal_with_date_and_time () const
bool	is_temporal_with_time () const
bool	is_temporal () const
bool	has_compatible_context (Item *item) const
String *	check_well_formed_result (String *str, bool send_error=0)
bool	eq_by_collation (Item item, bool binary_cmp, const CHARSET_INFO cs)
virtual bool	is_expensive ()
virtual bool	can_be_evaluated_now () const
uint32	max_char_length () const
void	fix_length_and_charset (uint32 max_char_length_arg, const CHARSET_INFO *cs)
void	fix_char_length (uint32 max_char_length_arg)
void	fix_char_length_ulonglong (ulonglong max_char_length_arg)
void	fix_length_and_charset_datetime (uint32 max_char_length_arg)
void	fix_length_and_dec_and_charset_datetime (uint32 max_char_length_arg, uint8 dec_arg)
bool	is_blob_field () const
virtual bool	has_subquery () const
virtual bool	has_stored_program () const
virtual bool	created_by_in2exists () const
	Whether this Item was created by the IN->EXISTS subquery transformation.

Public Attributes
Item *	arg
Public Attributes inherited from Item_field
Field *	field
Field *	result_field
Item_equal *	item_equal
bool	no_const_subst
uint	have_privileges
bool	any_privileges
Public Attributes inherited from Item_ident
Name_resolution_context *	context
const char *	db_name
const char *	table_name
const char *	field_name
bool	alias_name_used
uint	cached_field_index
TABLE_LIST *	cached_table
st_select_lex *	depended_from
Public Attributes inherited from Item
uint	rsize
String	str_value
Item_name_string	item_name
Item_name_string	orig_name
Item *	next
uint32	max_length
int	marker
uint8	decimals
my_bool	maybe_null
my_bool	null_value
my_bool	unsigned_flag
my_bool	with_sum_func
my_bool	fixed
DTCollation	collation
Item_result	cmp_context

Additional Inherited Members
Public Types inherited from Item
enum	Type { FIELD_ITEM = 0, FUNC_ITEM, SUM_FUNC_ITEM, STRING_ITEM, INT_ITEM, REAL_ITEM, NULL_ITEM, VARBIN_ITEM, COPY_STR_ITEM, FIELD_AVG_ITEM, DEFAULT_VALUE_ITEM, PROC_ITEM, COND_ITEM, REF_ITEM, FIELD_STD_ITEM, FIELD_VARIANCE_ITEM, INSERT_VALUE_ITEM, SUBSELECT_ITEM, ROW_ITEM, CACHE_ITEM, TYPE_HOLDER, PARAM_ITEM, TRIGGER_FIELD_ITEM, DECIMAL_ITEM, XPATH_NODESET, XPATH_NODESET_CMP, VIEW_FIXER_ITEM }
enum	cond_result { COND_UNDEF, COND_OK, COND_TRUE, COND_FALSE }
enum	traverse_order { POSTFIX, PREFIX }
Static Public Member Functions inherited from Item
static void *	operator new (size_t size) throw ()
static void *	operator new (size_t size, MEM_ROOT *mem_root) throw ()
static void	operator delete (void *ptr, size_t size)
static void	operator delete (void ptr, MEM_ROOT mem_root)
static const CHARSET_INFO *	default_charset ()
Protected Member Functions inherited from Item_field
void	set_field (Field *field)
Protected Attributes inherited from Item_ident
const char *	orig_db_name
const char *	orig_table_name
const char *	orig_field_name

Detailed Description

Definition at line 3996 of file item.h.

Member Function Documentation

bool Item_insert_value::eq	(	const Item *	item,
		bool	binary_cmp
	)		const

virtual

This function is called when:

Comparing items in the WHERE clause (when doing where optimization)
When trying to find an ORDER BY/GROUP BY item in the SELECT part
When matching fields in multiple equality objects (Item_equal)

Reimplemented from Item_field.

Definition at line 8092 of file item.cc.

bool Item_insert_value::fix_fields	(	THD *	thd,
		Item **	reference
	)

virtual

Resolve the name of a column reference.

The method resolves the column reference represented by 'this' as a column present in one of: FROM clause, SELECT clause, GROUP BY clause of a query Q, or in outer queries that contain Q.

The name resolution algorithm used is (where [T_j] is an optional table name that qualifies the column name):

resolve_column_reference([T_j].col_ref_i)
{
  search for a column or derived column named col_ref_i
  [in table T_j] in the FROM clause of Q;
  if such a column is NOT found AND    // Lookup in outer queries.
     there are outer queries
  {
    for each outer query Q_k beginning from the inner-most one
    {
      search for a column or derived column named col_ref_i
      [in table T_j] in the FROM clause of Q_k;
      if such a column is not found
        Search for a column or derived column named col_ref_i
        [in table T_j] in the SELECT and GROUP clauses of Q_k.
    }
  }
}

Notice that compared to Item_ref::fix_fields, here we first search the FROM clause, and then we search the SELECT and GROUP BY clauses.

Parameters

[in]	thd	current thread
[in,out]	reference	view column if this item was resolved to a view column

Return values

TRUE	if error
FALSE	on success

Reimplemented from Item_field.

Definition at line 8099 of file item.cc.

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void Item_insert_value::print	(	String *	str,
		enum_query_type	query_type
	)

virtual

This method is used for to:

to generate a view definition query (SELECT-statement);
to generate a SQL-query for EXPLAIN EXTENDED;
to generate a SQL-query to be shown in INFORMATION_SCHEMA;
debug.

For more information about view definition query, INFORMATION_SCHEMA query and why they should be generated from the Item-tree,

See Also: mysql_register_view().

Reimplemented from Item_field.

Definition at line 8148 of file item.cc.

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type_conversion_status Item_insert_value::save_in_field	(	Field *	field,
		bool	no_conversions
	)

inlinevirtual

Save a temporal value in packed longlong format into a Field. Used in optimizer.

Parameters

OUT	field The field to set the value to.

Return values

0	On success.
>0	In error.

Reimplemented from Item_field.

Definition at line 4007 of file item.h.

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

sql/item.h
sql/item.cc

Public Member Functions

Public Attributes

Additional Inherited Members

Detailed Description

Member Function Documentation