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MySQL 5.1: Item_func_makedate Class Reference

Item_func_makedate Class Reference

#include <item_timefunc.h>

Inheritance diagram for Item_func_makedate:

[legend]Collaboration diagram for Item_func_makedate:

[legend]List of all members.


Public Member Functions
	Item_func_makedate (Item a, Item b)
String *	val_str (String *str)
const char *	func_name () const
enum_field_types	field_type () const
void	fix_length_and_dec ()
Field *	tmp_table_field (TABLE *table)
bool	result_as_longlong ()
longlong	val_int ()
bool	check_partition_func_processor (byte *bool_arg)

Detailed Description

Definition at line 814 of file item_timefunc.h.

Constructor & Destructor Documentation

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

Definition at line 817 of file item_timefunc.h.

00817 :Item_str_func(a,b) {}

Member Function Documentation

bool Item_func_makedate::check_partition_func_processor ( byte * bool_arg ) [inline, virtual]

Reimplemented from Item.

Definition at line 832 of file item_timefunc.h.

00832 { return 0;}

enum_field_types Item_func_makedate::field_type ( ) const [inline, virtual]

Reimplemented from Item.

Definition at line 820 of file item_timefunc.h.

References MYSQL_TYPE_DATE.

00820 { return MYSQL_TYPE_DATE; }

void Item_func_makedate::fix_length_and_dec ( ) [inline, virtual]

Implements Item_result_field.

Definition at line 821 of file item_timefunc.h.

References Item::decimals, MAX_DATE_WIDTH, Item::max_length, and MY_CHARSET_BIN_MB_MAXLEN.

00822   { 
00823     decimals=0;
00824     max_length=MAX_DATE_WIDTH*MY_CHARSET_BIN_MB_MAXLEN;
00825   }

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

Implements Item_func.

Definition at line 819 of file item_timefunc.h.

00819 { return "makedate"; }

bool Item_func_makedate::result_as_longlong ( ) [inline, virtual]

Reimplemented from Item.

Definition at line 830 of file item_timefunc.h.

References TRUE.

00830 { return TRUE; }

Field* Item_func_makedate::tmp_table_field ( TABLE * table ) [inline, virtual]

Reimplemented from Item_func.

Definition at line 826 of file item_timefunc.h.

References Item::tmp_table_field_from_field_type().

00827   {
00828     return tmp_table_field_from_field_type(table, 0);
00829   }

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longlong Item_func_makedate::val_int ( ) [virtual]

Reimplemented from Item_str_func.

Definition at line 2482 of file item_timefunc.cc.

References Item_func::args, calc_daynr(), st_mysql_time::day, DBUG_ASSERT, err, Item::fixed, get_date_from_daynr(), MAX_DAY_NUMBER, st_mysql_time::month, Item::null_value, and st_mysql_time::year.

Referenced by val_str().

02483 {
02484   DBUG_ASSERT(fixed == 1);
02485   TIME l_time;
02486   long daynr=  (long) args[1]->val_int();
02487   long yearnr= (long) args[0]->val_int();
02488   long days;
02489 
02490   if (args[0]->null_value || args[1]->null_value ||
02491       yearnr < 0 || daynr <= 0)
02492     goto err;
02493 
02494   days= calc_daynr(yearnr,1,1) + daynr - 1;
02495   /* Day number from year 0 to 9999-12-31 */
02496   if (days >= 0 && days < MAX_DAY_NUMBER)
02497   {
02498     null_value=0;
02499     get_date_from_daynr(days,&l_time.year,&l_time.month,&l_time.day);
02500     return (longlong) (l_time.year * 10000L + l_time.month * 100 + l_time.day);
02501   }
02502 
02503 err:
02504   null_value= 1;
02505   return 0;
02506 }

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

Implements Item.

Definition at line 2452 of file item_timefunc.cc.

References String::alloc(), Item_func::args, calc_daynr(), st_mysql_time::day, DBUG_ASSERT, err, Item::fixed, get_date_from_daynr(), make_date(), MAX_DAY_NUMBER, st_mysql_time::month, Item::null_value, val_int(), and st_mysql_time::year.

02453 {
02454   DBUG_ASSERT(fixed == 1);
02455   TIME l_time;
02456   long daynr=  (long) args[1]->val_int();
02457   long yearnr= (long) args[0]->val_int();
02458   long days;
02459 
02460   if (args[0]->null_value || args[1]->null_value ||
02461       yearnr < 0 || daynr <= 0)
02462     goto err;
02463 
02464   days= calc_daynr(yearnr,1,1) + daynr - 1;
02465   /* Day number from year 0 to 9999-12-31 */
02466   if (days >= 0 && days <= MAX_DAY_NUMBER)
02467   {
02468     null_value=0;
02469     get_date_from_daynr(days,&l_time.year,&l_time.month,&l_time.day);
02470     if (str->alloc(11))
02471       goto err;
02472     make_date((DATE_TIME_FORMAT *) 0, &l_time, str);
02473     return str;
02474   }
02475 
02476 err:
02477   null_value=1;
02478   return 0;
02479 }

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

mysql/src/5.1-dbg/sql/item_timefunc.h
mysql/src/5.1-dbg/sql/item_timefunc.cc

Generated on Sat Sep 9 21:36:48 2006 for MySQL 5.1 by

1.4.7

The world's most popular open source database

Item_func_makedate Class Reference

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation