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MySQL 5.1: Item_name_const Class Reference

Item_name_const Class Reference

#include <item.h>

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List of all members.

Public Member Functions

 Item_name_const (Item *name, Item *val)
bool check_partition_func_processor (byte *bool_arg)
bool fix_fields (THD *, Item **)
enum Type type () const
double val_real ()
longlong val_int ()
String * val_str (String *sp)
my_decimal * val_decimal (my_decimal *)
bool is_null ()
void print (String *str)
Item_result result_type () const
bool const_item () const
int save_in_field (Field *field, bool no_conversions)
bool send (Protocol *protocol, String *str)

Private Attributes

Item * value_item
Item * name_item

Detailed Description

Definition at line 1100 of file item.h.

Constructor & Destructor Documentation

Item_name_const::Item_name_const ( Item *  name,
Item *  val 
) [inline]

Definition at line 1105 of file item.h.

References Item::maybe_null, and TRUE.

01105                                         : value_item(val), name_item(name)
01106   {
01107     Item::maybe_null= TRUE;
01108   }

Member Function Documentation

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

Reimplemented from Item.

Definition at line 1110 of file item.h.

01110 { return 0; }

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

Reimplemented from Item.

Definition at line 1126 of file item.h.

References TRUE.

01127   {
01128     return TRUE;
01129   }

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

Reimplemented from Item.

Definition at line 1099 of file item.cc.

References buf, Item::const_item(), Item::decimals, FALSE, Item::fix_fields(), fix_fields(), Item::fixed, String::length(), Item::max_length, my_charset_bin, name_item, String::ptr(), Item::set_name(), system_charset_info, TRUE, Item::val_str(), and value_item.

Referenced by fix_fields().

01100 {
01101   char buf[128];
01102   String *item_name;
01103   String s(buf, sizeof(buf), &my_charset_bin);
01104   s.length(0);
01105 
01106   if (value_item->fix_fields(thd, &value_item) ||
01107       name_item->fix_fields(thd, &name_item))
01108     return TRUE;
01109   if (!(value_item->const_item() && name_item->const_item()))
01110     return TRUE;
01111 
01112   if (!(item_name= name_item->val_str(&s)))
01113     return TRUE; /* Can't have a NULL name */
01114 
01115   set_name(item_name->ptr(), (uint) item_name->length(), system_charset_info);
01116   max_length= value_item->max_length;
01117   decimals= value_item->decimals;
01118   fixed= 1;
01119   return FALSE;
01120 }

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bool Item_name_const::is_null (  )  [virtual]

Reimplemented from Item.

Definition at line 1088 of file item.cc.

References Item::is_null(), is_null(), and value_item.

Referenced by is_null().

01089 {
01090   return value_item->is_null();
01091 }

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

Reimplemented from Item.

Definition at line 1123 of file item.cc.

References String::append(), name_item, Item::print(), STRING_WITH_LEN, and value_item.

01124 {
01125   str->append(STRING_WITH_LEN("NAME_CONST("));
01126   name_item->print(str);
01127   str->append(',');
01128   value_item->print(str);
01129   str->append(')');
01130 }

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Item_result Item_name_const::result_type (  )  const [inline, virtual]

Reimplemented from Item.

Definition at line 1121 of file item.h.

References Item::result_type(), and value_item.

01122   {
01123     return value_item->result_type();
01124   }

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int Item_name_const::save_in_field ( Field *  field,
bool  no_conversions 
) [inline, virtual]

Reimplemented from Item.

Definition at line 1131 of file item.h.

References Item::save_in_field(), and value_item.

01132   {
01133     return  value_item->save_in_field(field, no_conversions);
01134   }

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bool Item_name_const::send ( Protocol *  protocol,
String *  str 
) [inline, virtual]

Reimplemented from Item.

Definition at line 1136 of file item.h.

References Item::send(), and value_item.

01137   {
01138     return value_item->send(protocol, str);
01139   }

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Item::Type Item_name_const::type (  )  const [virtual]

Implements Item.

Definition at line 1093 of file item.cc.

References Item::type(), type(), and value_item.

Referenced by type().

01094 {
01095   return value_item->type();
01096 }

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

Implements Item.

Definition at line 1079 of file item.cc.

References DBUG_ASSERT, Item::fixed, Item::null_value, Item::val_decimal(), val_decimal(), and value_item.

Referenced by val_decimal().

01080 {
01081   DBUG_ASSERT(fixed);
01082   my_decimal *val= value_item->val_decimal(decimal_value);
01083   null_value= value_item->null_value;
01084   return val;
01085 }

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longlong Item_name_const::val_int (  )  [virtual]

Implements Item.

Definition at line 1061 of file item.cc.

References DBUG_ASSERT, Item::fixed, Item::null_value, Item::val_int(), val_int(), and value_item.

Referenced by val_int().

01062 {
01063   DBUG_ASSERT(fixed);
01064   longlong ret= value_item->val_int();
01065   null_value= value_item->null_value;
01066   return ret;
01067 }

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double Item_name_const::val_real (  )  [virtual]

Implements Item.

Definition at line 1052 of file item.cc.

References DBUG_ASSERT, Item::fixed, Item::null_value, Item::val_real(), val_real(), and value_item.

Referenced by val_real().

01053 {
01054   DBUG_ASSERT(fixed);
01055   double ret= value_item->val_real();
01056   null_value= value_item->null_value;
01057   return ret;
01058 }

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String * Item_name_const::val_str ( String *  sp  )  [virtual]

Implements Item.

Definition at line 1070 of file item.cc.

References DBUG_ASSERT, Item::fixed, Item::null_value, Item::val_str(), val_str(), and value_item.

Referenced by val_str().

01071 {
01072   DBUG_ASSERT(fixed);
01073   String *ret= value_item->val_str(sp);
01074   null_value= value_item->null_value;
01075   return ret;
01076 }

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Member Data Documentation

Item* Item_name_const::name_item [private]

Definition at line 1103 of file item.h.

Referenced by fix_fields(), and print().

Item* Item_name_const::value_item [private]

Definition at line 1102 of file item.h.

Referenced by fix_fields(), is_null(), print(), result_type(), save_in_field(), send(), type(), val_decimal(), val_int(), val_real(), and val_str().

The documentation for this class was generated from the following files:
Generated on Sat Sep 9 21:50:05 2006 for MySQL 5.1 by  doxygen 1.4.7