MySQL 5.1: Item_copy_string Class Reference

Item_copy_string Class Reference

#include <item.h>

Inheritance diagram for Item_copy_string:

[legend]Collaboration diagram for Item_copy_string:


Public Member Functions
	Item_copy_string (Item *i)
enum Type	type () const
enum Item_result	result_type () const
enum_field_types	field_type () const
double	val_real ()
longlong	val_int ()
String *	val_str (String *)
my_decimal *	val_decimal (my_decimal *)
void	make_field (Send_field *field)
void	copy ()
int	save_in_field (Field *field, bool no_conversions)
table_map	used_tables () const
bool	const_item () const
bool	is_null ()
Public Attributes
Item *	item
Private Attributes
enum enum_field_types	cached_field_type

Detailed Description

Definition at line 2070 of file item.h.

Constructor & Destructor Documentation

Item_copy_string::Item_copy_string ( Item * i ) [inline]

Definition at line 2075 of file item.h.

References cached_field_type, Item::decimals, Item::field_type(), item, Item::max_length, Item::maybe_null, Item::name, and Item::null_value.

02075                             :item(i)
02076   {
02077     null_value=maybe_null=item->maybe_null;
02078     decimals=item->decimals;
02079     max_length=item->max_length;
02080     name=item->name;
02081     cached_field_type= item->field_type();
02082   }

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Member Function Documentation

bool Item_copy_string::const_item ( ) const [inline, virtual]

Reimplemented from Item.

Definition at line 2107 of file item.h.

02107 { return 0; }

void Item_copy_string::copy ( )

Definition at line 2881 of file item.cc.

References String::copy(), item, Item::null_value, Item::str_value, and Item::val_str().

02882 {
02883   String *res=item->val_str(&str_value);
02884   if (res && res != &str_value)
02885     str_value.copy(*res);
02886   null_value=item->null_value;
02887 }

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

Reimplemented from Item.

Definition at line 2085 of file item.h.

References cached_field_type.

02085 { return cached_field_type; }

bool Item_copy_string::is_null ( ) [inline, virtual]

Reimplemented from Item.

Definition at line 2108 of file item.h.

References Item::null_value.

02108 { return null_value; }

void Item_copy_string::make_field ( Send_field * field ) [inline, virtual]

Reimplemented from Item.

Definition at line 2103 of file item.h.

References item, and Item::make_field().

02103 { item->make_field(field); }

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

Reimplemented from Item.

Definition at line 2084 of file item.h.

References STRING_RESULT.

02084 { return STRING_RESULT; }

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

Reimplemented from Item.

Definition at line 2910 of file item.cc.

References DTCollation::collation, Item::collation, String::length(), Item::null_value, String::ptr(), set_field_to_null(), and Item::str_value.

02911 {
02912   if (null_value)
02913     return set_field_to_null(field);
02914   field->set_notnull();
02915   return field->store(str_value.ptr(),str_value.length(),
02916                       collation.collation);
02917 }

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

Implements Item.

Definition at line 2083 of file item.h.

References Item::COPY_STR_ITEM.

02083 { return COPY_STR_ITEM; }

table_map Item_copy_string::used_tables ( ) const [inline, virtual]

Reimplemented from Item.

Definition at line 2106 of file item.h.

02106 { return (table_map) 1L; }

my_decimal * Item_copy_string::val_decimal ( my_decimal * ) [virtual]

Implements Item.

Definition at line 2899 of file item.cc.

References E_DEC_FATAL_ERROR, Item::null_value, and Item::str_value.

02900 {
02901   // Item_copy_string is used without fix_fields call
02902   if (null_value)
02903     return 0;
02904   string2my_decimal(E_DEC_FATAL_ERROR, &str_value, decimal_value);
02905   return (decimal_value);
02906 }

longlong Item_copy_string::val_int ( void ) [inline, virtual]

Implements Item.

Definition at line 2094 of file item.h.

References String::charset(), err, String::length(), LL, my_strntoll, Item::null_value, String::ptr(), and Item::str_value.

02095   {
02096     int err;
02097     return null_value ? LL(0) : my_strntoll(str_value.charset(),str_value.ptr(),
02098                                             str_value.length(),10, (char**) 0,
02099                                             &err); 
02100   }

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

Implements Item.

Definition at line 2086 of file item.h.

References String::charset(), String::length(), my_strntod, Item::null_value, String::ptr(), and Item::str_value.

02087   {
02088     int err_not_used;
02089     char *end_not_used;
02090     return (null_value ? 0.0 :
02091             my_strntod(str_value.charset(), (char*) str_value.ptr(),
02092                        str_value.length(), &end_not_used, &err_not_used));
02093   }

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

Implements Item.

Definition at line 2890 of file item.cc.

References Item::null_value, and Item::str_value.

02891 {
02892   // Item_copy_string is used without fix_fields call
02893   if (null_value)
02894     return (String*) 0;
02895   return &str_value;
02896 }