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MySQL 5.1: Item_decimal Class Reference

Item_decimal Class Reference

#include <item.h>

Inheritance diagram for Item_decimal:

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[legend]List of all members.


Public Member Functions
	Item_decimal (const char str_arg, uint length, CHARSET_INFO charset)
	Item_decimal (const char str, const my_decimal val_arg, uint decimal_par, uint length)
	Item_decimal (my_decimal *value_par)
	Item_decimal (longlong val, bool unsig)
	Item_decimal (double val, int precision, int scale)
	Item_decimal (const char *bin, int precision, int scale)
enum Type	type () const
enum Item_result	result_type () const
enum_field_types	field_type () const
longlong	val_int ()
double	val_real ()
String *	val_str (String *)
my_decimal *	val_decimal (my_decimal *val)
int	save_in_field (Field *field, bool no_conversions)
bool	basic_const_item () const
Item *	new_item ()
void	cleanup ()
void	print (String *str)
Item_num *	neg ()
uint	decimal_precision () const
bool	eq (const Item *, bool binary_cmp) const
void	set_decimal_value (my_decimal *value_par)
Protected Attributes
my_decimal	decimal_value

Detailed Description

Definition at line 1569 of file item.h.

Constructor & Destructor Documentation

Item_decimal::Item_decimal	(	const char *	str_arg,
		uint	length,
		CHARSET_INFO *	charset
	)

Definition at line 1949 of file item.cc.

References charset, decimal_value, Item::decimals, E_DEC_FATAL_ERROR, Item::fixed, st_decimal_t::frac, st_decimal_t::intg, Item::max_length, my_decimal_precision_to_length(), Item::name, str2my_decimal(), and Item::unsigned_flag.

Referenced by new_item().

01951 {
01952   str2my_decimal(E_DEC_FATAL_ERROR, str_arg, length, charset, &decimal_value);
01953   name= (char*) str_arg;
01954   decimals= (uint8) decimal_value.frac;
01955   fixed= 1;
01956   max_length= my_decimal_precision_to_length(decimal_value.intg + decimals,
01957                                              decimals, unsigned_flag);
01958 }

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Item_decimal::Item_decimal	(	const char *	str,
		const my_decimal *	val_arg,
		uint	decimal_par,
		uint	length
	)

Definition at line 1980 of file item.cc.

References decimal_value, Item::decimals, Item::fixed, Item::max_length, my_decimal2decimal(), and Item::name.

01982 {
01983   my_decimal2decimal(val_arg, &decimal_value);
01984   name= (char*) str;
01985   decimals= (uint8) decimal_par;
01986   max_length= length;
01987   fixed= 1;
01988 }

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Item_decimal::Item_decimal ( my_decimal * value_par )

Definition at line 1991 of file item.cc.

References decimal_value, Item::decimals, Item::fixed, st_decimal_t::frac, st_decimal_t::intg, Item::max_length, my_decimal2decimal(), my_decimal_precision_to_length(), and Item::unsigned_flag.

01992 {
01993   my_decimal2decimal(value_par, &decimal_value);
01994   decimals= (uint8) decimal_value.frac;
01995   fixed= 1;
01996   max_length= my_decimal_precision_to_length(decimal_value.intg + decimals,
01997                                              decimals, unsigned_flag);
01998 }

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Item_decimal::Item_decimal	(	longlong	val,
		bool	unsig
	)

Definition at line 1960 of file item.cc.

References decimal_value, Item::decimals, E_DEC_FATAL_ERROR, Item::fixed, st_decimal_t::frac, int2my_decimal(), st_decimal_t::intg, Item::max_length, my_decimal_precision_to_length(), and Item::unsigned_flag.

01961 {
01962   int2my_decimal(E_DEC_FATAL_ERROR, val, unsig, &decimal_value);
01963   decimals= (uint8) decimal_value.frac;
01964   fixed= 1;
01965   max_length= my_decimal_precision_to_length(decimal_value.intg + decimals,
01966                                              decimals, unsigned_flag);
01967 }

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Item_decimal::Item_decimal	(	double	val,
		int	precision,
		int	scale
	)

Definition at line 1970 of file item.cc.

References decimal_value, Item::decimals, double2my_decimal(), E_DEC_FATAL_ERROR, Item::fixed, st_decimal_t::frac, st_decimal_t::intg, Item::max_length, my_decimal_precision_to_length(), and Item::unsigned_flag.

01971 {
01972   double2my_decimal(E_DEC_FATAL_ERROR, val, &decimal_value);
01973   decimals= (uint8) decimal_value.frac;
01974   fixed= 1;
01975   max_length= my_decimal_precision_to_length(decimal_value.intg + decimals,
01976                                              decimals, unsigned_flag);
01977 }

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Item_decimal::Item_decimal	(	const char *	bin,
		int	precision,
		int	scale
	)

Definition at line 2001 of file item.cc.

References binary2my_decimal(), decimal_value, Item::decimals, E_DEC_FATAL_ERROR, Item::fixed, st_decimal_t::frac, Item::max_length, my_decimal_precision_to_length(), and Item::unsigned_flag.

02002 {
02003   binary2my_decimal(E_DEC_FATAL_ERROR, bin,
02004                     &decimal_value, precision, scale);
02005   decimals= (uint8) decimal_value.frac;
02006   fixed= 1;
02007   max_length= my_decimal_precision_to_length(precision, decimals,
02008                                              unsigned_flag);
02009 }

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Member Function Documentation

bool Item_decimal::basic_const_item ( ) const [inline, virtual]

Reimplemented from Item.

Definition at line 1590 of file item.h.

01590 { return 1; }

void Item_decimal::cleanup ( ) [inline, virtual]

Reimplemented from Item.

Definition at line 1596 of file item.h.

01596 {}

uint Item_decimal::decimal_precision ( ) const [inline, virtual]

Reimplemented from Item.

Definition at line 1604 of file item.h.

References decimal_value, and my_decimal::precision().

01604 { return decimal_value.precision(); }

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bool Item_decimal::eq	(	const Item *	,
		bool	binary_cmp
	)			const `[virtual]`

Reimplemented from Item.

Definition at line 2040 of file item.cc.

References Item::basic_const_item(), decimal_value, my_decimal_cmp(), Item::type(), type(), and value.

02041 {
02042   if (type() == item->type() && item->basic_const_item())
02043   {
02044     /*
02045       We need to cast off const to call val_decimal(). This should
02046       be OK for a basic constant. Additionally, we can pass 0 as
02047       a true decimal constant will return its internal decimal
02048       storage and ignore the argument.
02049     */
02050     Item *arg= (Item*) item;
02051     my_decimal *value= arg->val_decimal(0);
02052     return !my_decimal_cmp(&decimal_value, value);
02053   }
02054   return 0;
02055 }

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

Reimplemented from Item.

Definition at line 1584 of file item.h.

References MYSQL_TYPE_NEWDECIMAL.

01584 { return MYSQL_TYPE_NEWDECIMAL; }

Item_num* Item_decimal::neg ( ) [inline, virtual]

Implements Item_num.

Definition at line 1598 of file item.h.

References decimal_value, my_decimal_neg(), my_decimal::sign(), and Item::unsigned_flag.

Referenced by Item_uint::neg().

01599   {
01600     my_decimal_neg(&decimal_value);
01601     unsigned_flag= !decimal_value.sign();
01602     return this;
01603   }

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Item* Item_decimal::new_item ( ) [inline, virtual]

Reimplemented from Item.

Definition at line 1591 of file item.h.

References decimal_value, Item::decimals, Item_decimal(), Item::max_length, and Item::name.

01592   {
01593     return new Item_decimal(name, &decimal_value, decimals, max_length);
01594   }

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void Item_decimal::print ( String * str ) [virtual]

Reimplemented from Item.

Definition at line 2033 of file item.cc.

References String::append(), decimal_value, E_DEC_FATAL_ERROR, my_decimal2string(), and Item::str_value.

02034 {
02035   my_decimal2string(E_DEC_FATAL_ERROR, &decimal_value, 0, 0, 0, &str_value);
02036   str->append(str_value);
02037 }

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enum Item_result Item_decimal::result_type ( ) const [inline, virtual]

Reimplemented from Item.

Definition at line 1583 of file item.h.

References DECIMAL_RESULT.

01583 { return DECIMAL_RESULT; }

int Item_decimal::save_in_field	(	Field *	field,
		bool	no_conversions
	)			`[virtual]`

Reimplemented from Item.

Definition at line 4256 of file item.cc.

References decimal_value, Field::set_notnull(), and Field::store_decimal().

04257 {
04258   field->set_notnull();
04259   return field->store_decimal(&decimal_value);
04260 }

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void Item_decimal::set_decimal_value ( my_decimal * value_par )

Definition at line 2058 of file item.cc.

References decimal_value, Item::decimals, st_decimal_t::frac, st_decimal_t::intg, Item::max_length, my_decimal2decimal(), my_decimal_precision_to_length(), my_decimal::sign(), and Item::unsigned_flag.

Referenced by in_decimal::value_to_item().

02059 {
02060   my_decimal2decimal(value_par, &decimal_value);
02061   decimals= (uint8) decimal_value.frac;
02062   unsigned_flag= !decimal_value.sign();
02063   max_length= my_decimal_precision_to_length(decimal_value.intg + decimals,
02064                                              decimals, unsigned_flag);
02065 }

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enum Type Item_decimal::type ( ) const [inline, virtual]

Implements Item.

Definition at line 1582 of file item.h.

References Item::DECIMAL_ITEM.

Referenced by eq().

01582 { return DECIMAL_ITEM; }

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my_decimal* Item_decimal::val_decimal ( my_decimal * val ) [inline, virtual]

Implements Item.

Definition at line 1588 of file item.h.

References decimal_value.

01588 { return &decimal_value; }

longlong Item_decimal::val_int ( ) [virtual]

Implements Item.

Definition at line 2012 of file item.cc.

References decimal_value, E_DEC_FATAL_ERROR, my_decimal2int(), and Item::unsigned_flag.

02013 {
02014   longlong result;
02015   my_decimal2int(E_DEC_FATAL_ERROR, &decimal_value, unsigned_flag, &result);
02016   return result;
02017 }

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double Item_decimal::val_real ( ) [virtual]

Implements Item.

Definition at line 2019 of file item.cc.

References decimal_value, E_DEC_FATAL_ERROR, and my_decimal2double().

02020 {
02021   double result;
02022   my_decimal2double(E_DEC_FATAL_ERROR, &decimal_value, &result);
02023   return result;
02024 }

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String * Item_decimal::val_str ( String * ) [virtual]

Implements Item.

Definition at line 2026 of file item.cc.

References decimal_value, E_DEC_FATAL_ERROR, my_charset_bin, my_decimal2string(), and String::set_charset().

02027 {
02028   result->set_charset(&my_charset_bin);
02029   my_decimal2string(E_DEC_FATAL_ERROR, &decimal_value, 0, 0, 0, result);
02030   return result;
02031 }

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Member Data Documentation

my_decimal Item_decimal::decimal_value [protected]

Definition at line 1572 of file item.h.

Referenced by decimal_precision(), eq(), Item_decimal(), neg(), new_item(), print(), save_in_field(), set_decimal_value(), val_decimal(), val_int(), val_real(), and val_str().

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

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

Generated on Sat Sep 9 21:22:10 2006 for MySQL 5.1 by

1.4.7

The world's most popular open source database

Item_decimal Class Reference

Public Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

Member Function Documentation

Member Data Documentation