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MySQL 5.1: Item_func_convert_tz Class Reference

Item_func_convert_tz Class Reference

#include <item_timefunc.h>

Inheritance diagram for Item_func_convert_tz:

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[legend]List of all members.


Public Member Functions
	Item_func_convert_tz (Item a, Item b, Item *c)
longlong	val_int ()
double	val_real ()
String *	val_str (String *str)
const char *	func_name () const
bool	fix_fields (THD , Item *)
void	fix_length_and_dec ()
bool	get_date (TIME *res, uint fuzzy_date)
void	cleanup ()
Private Attributes
TABLE_LIST *	tz_tables
bool	from_tz_cached
bool	to_tz_cached
Time_zone *	from_tz
Time_zone *	to_tz

Detailed Description

Definition at line 603 of file item_timefunc.h.

Constructor & Destructor Documentation

Item_func_convert_tz::Item_func_convert_tz	(	Item *	a,
		Item *	b,
		Item *	c
	)			`[inline]`

Definition at line 616 of file item_timefunc.h.

00616                                                  :
00617     Item_date_func(a, b, c), from_tz_cached(0), to_tz_cached(0) {}
  longlong val_int();

Member Function Documentation

void Item_func_convert_tz::cleanup ( ) [virtual]

Reimplemented from Item_result_field.

Definition at line 1925 of file item_timefunc.cc.

References Item_result_field::cleanup(), from_tz_cached, and to_tz_cached.

01926 {
01927   from_tz_cached= to_tz_cached= 0;
01928   Item_date_func::cleanup();
01929 }

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bool Item_func_convert_tz::fix_fields	(	THD *	,
		Item **
	)			`[virtual]`

Reimplemented from Item_func.

Definition at line 1844 of file item_timefunc.cc.

References FALSE, Item_func::fix_fields(), TRUE, and tz_tables.

01845 {
01846   String str;
01847   if (Item_date_func::fix_fields(thd_arg, ref))
01848     return TRUE;
01849 
01850   tz_tables= thd_arg->lex->time_zone_tables_used;
01851 
01852   return FALSE;
01853 }

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void Item_func_convert_tz::fix_length_and_dec ( ) [virtual]

Implements Item_result_field.

Definition at line 1834 of file item_timefunc.cc.

References Item::collation, Item::decimals, MAX_DATETIME_WIDTH, Item::max_length, Item::maybe_null, my_charset_bin, MY_CHARSET_BIN_MB_MAXLEN, and DTCollation::set().

01835 {
01836   collation.set(&my_charset_bin);
01837   decimals= 0;
01838   max_length= MAX_DATETIME_WIDTH*MY_CHARSET_BIN_MB_MAXLEN;
01839   maybe_null= 1;
01840 }

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const char* Item_func_convert_tz::func_name ( ) const [inline, virtual]

Implements Item_func.

Definition at line 621 of file item_timefunc.h.

00621 { return "convert_tz"; }

bool Item_func_convert_tz::get_date	(	TIME *	res,
		uint	fuzzy_date
	)			`[virtual]`

Reimplemented from Item.

Referenced by val_int(), and val_str().

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longlong Item_func_convert_tz::val_int ( ) [virtual]

Reimplemented from Item_str_func.

Definition at line 1874 of file item_timefunc.cc.

References get_date(), and TIME_to_ulonglong_datetime().

Referenced by val_real().

01875 {
01876   TIME time_tmp;
01877 
01878   if (get_date(&time_tmp, 0))
01879     return 0;
01880   
01881   return (longlong)TIME_to_ulonglong_datetime(&time_tmp);
01882 }

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double Item_func_convert_tz::val_real ( void ) [inline, virtual]

Reimplemented from Item_str_func.

Definition at line 619 of file item_timefunc.h.

References val_int().

00619 { return (double) val_int(); }

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String * Item_func_convert_tz::val_str ( String * str ) [virtual]

Implements Item.

Definition at line 1856 of file item_timefunc.cc.

References String::alloc(), get_date(), make_datetime(), MY_CHARSET_BIN_MB_MAXLEN, and Item::null_value.

01857 {
01858   TIME time_tmp;
01859 
01860   if (get_date(&time_tmp, 0))
01861     return 0;
01862   
01863   if (str->alloc(20*MY_CHARSET_BIN_MB_MAXLEN))
01864   {
01865     null_value= 1;
01866     return 0;
01867   }
01868   
01869   make_datetime((DATE_TIME_FORMAT *) 0, &time_tmp, str);
01870   return str;
01871 }