Merge bk-internal:/home/bk/mysql-5.0

into serg.mylan:/usr/home/serg/Abk/mysql-5.0

sql/item.h

@@ -1481,7 +1481,7 @@ class Item_copy_string :public Item
 		       str_value.length(), &end_not_used, &err_not_used));
   }
   longlong val_int()
-  { 
+  {
     int err;
     return null_value ? LL(0) : my_strntoll(str_value.charset(),str_value.ptr(),str_value.length(),10, (char**) 0,&err); 
   }
@@ -1496,62 +1496,62 @@ class Item_copy_string :public Item
 };
 
 
-class Item_buff :public Sql_alloc
+class Cached_item :public Sql_alloc
 {
 public:
   my_bool null_value;
-  Item_buff() :null_value(0) {}
+  Cached_item() :null_value(0) {}
   virtual bool cmp(void)=0;
-  virtual ~Item_buff(); /*line -e1509 */
+  virtual ~Cached_item(); /*line -e1509 */
 };
 
-class Item_str_buff :public Item_buff
+class Cached_item_str :public Cached_item
 {
   Item *item;
   String value,tmp_value;
 public:
-  Item_str_buff(THD *thd, Item *arg);
+  Cached_item_str(THD *thd, Item *arg);
   bool cmp(void);
-  ~Item_str_buff();				// Deallocate String:s
+  ~Cached_item_str();                           // Deallocate String:s
 };
 
 
-class Item_real_buff :public Item_buff
+class Cached_item_real :public Cached_item
 {
   Item *item;
   double value;
 public:
-  Item_real_buff(Item *item_par) :item(item_par),value(0.0) {}
+  Cached_item_real(Item *item_par) :item(item_par),value(0.0) {}
   bool cmp(void);
 };
 
-class Item_int_buff :public Item_buff
+class Cached_item_int :public Cached_item
 {
   Item *item;
   longlong value;
 public:
-  Item_int_buff(Item *item_par) :item(item_par),value(0) {}
+  Cached_item_int(Item *item_par) :item(item_par),value(0) {}
   bool cmp(void);
 };
 
 
-class Item_decimal_buff :public Item_buff
+class Cached_item_decimal :public Cached_item
 {
   Item *item;
   my_decimal value;
 public:
-  Item_decimal_buff(Item *item_par);
+  Cached_item_decimal(Item *item_par);
   bool cmp(void);
 };
 
-class Item_field_buff :public Item_buff
+class Cached_item_field :public Cached_item
 {
   char *buff;
   Field *field;
   uint length;
 
 public:
-  Item_field_buff(Item_field *item)
+  Cached_item_field(Item_field *item)
   {
     field=item->field;
     buff= (char*) sql_calloc(length=field->pack_length());
@@ -1573,7 +1573,7 @@ class Item_default_value : public Item_field
   void print(String *str);
   int save_in_field(Field *field_arg, bool no_conversions);
   table_map used_tables() const { return (table_map)0L; }
-  
+
   bool walk(Item_processor processor, byte *args)
   {
     return arg->walk(processor, args) ||
@@ -1879,7 +1879,7 @@ void mark_select_range_as_dependent(THD *thd,
                                     Field *found_field, Item *found_item,
                                     Item_ident *resolved_item);
 
-extern Item_buff *new_Item_buff(THD *thd, Item *item);
+extern Cached_item *new_Cached_item(THD *thd, Item *item);
 extern Item_result item_cmp_type(Item_result a,Item_result b);
 extern void resolve_const_item(THD *thd, Item **ref, Item *cmp_item);
 extern bool field_is_equal_to_item(Field *field,Item *item);

sql/item_buff.cc

@@ -20,23 +20,23 @@
 #include "mysql_priv.h"
 
 /*
-** Create right type of item_buffer for an item
+** Create right type of Cached_item for an item
 */
 
-Item_buff *new_Item_buff(THD *thd, Item *item)
+Cached_item *new_Cached_item(THD *thd, Item *item)
 {
   if (item->type() == Item::FIELD_ITEM &&
       !(((Item_field *) item)->field->flags & BLOB_FLAG))
-    return new Item_field_buff((Item_field *) item);
+    return new Cached_item_field((Item_field *) item);
   switch (item->result_type()) {
   case STRING_RESULT:
-    return new Item_str_buff(thd, (Item_field *) item);
+    return new Cached_item_str(thd, (Item_field *) item);
   case INT_RESULT:
-    return new Item_int_buff((Item_field *) item);
+    return new Cached_item_int((Item_field *) item);
   case REAL_RESULT:
-    return new Item_real_buff(item);
+    return new Cached_item_real(item);
   case DECIMAL_RESULT:
-    return new Item_decimal_buff(item);
+    return new Cached_item_decimal(item);
   case ROW_RESULT:
   default:
     DBUG_ASSERT(0);
@@ -44,18 +44,18 @@ Item_buff *new_Item_buff(THD *thd, Item *item)
   }
 }
 
-Item_buff::~Item_buff() {}
+Cached_item::~Cached_item() {}
 
 /*
 ** Compare with old value and replace value with new value
 ** Return true if values have changed
 */
 
-Item_str_buff::Item_str_buff(THD *thd, Item *arg)
+Cached_item_str::Cached_item_str(THD *thd, Item *arg)
   :item(arg), value(min(arg->max_length, thd->variables.max_sort_length))
 {}
 
-bool Item_str_buff::cmp(void)
+bool Cached_item_str::cmp(void)
 {
   String *res;
   bool tmp;
@@ -77,12 +77,12 @@ bool Item_str_buff::cmp(void)
   return tmp;
 }
 
-Item_str_buff::~Item_str_buff()
+Cached_item_str::~Cached_item_str()
 {
   item=0;					// Safety
 }
 
-bool Item_real_buff::cmp(void)
+bool Cached_item_real::cmp(void)
 {
   double nr= item->val_real();
   if (null_value != item->null_value || nr != value)
@@ -94,7 +94,7 @@ bool Item_real_buff::cmp(void)
   return FALSE;
 }
 
-bool Item_int_buff::cmp(void)
+bool Cached_item_int::cmp(void)
 {
   longlong nr=item->val_int();
   if (null_value != item->null_value || nr != value)
@@ -107,7 +107,7 @@ bool Item_int_buff::cmp(void)
 }
 
 
-bool Item_field_buff::cmp(void)
+bool Cached_item_field::cmp(void)
 {
   bool tmp= field->cmp(buff) != 0;		// This is not a blob!
   if (tmp)
@@ -121,14 +121,14 @@ bool Item_field_buff::cmp(void)
 }
 
 
-Item_decimal_buff::Item_decimal_buff(Item *it)
+Cached_item_decimal::Cached_item_decimal(Item *it)
   :item(it)
 {
   my_decimal_set_zero(&value);
 }
 
 
-bool Item_decimal_buff::cmp()
+bool Cached_item_decimal::cmp()
 {
   my_decimal tmp;
   my_decimal *ptmp= item->val_decimal(&tmp);
@@ -147,6 +147,6 @@ bool Item_decimal_buff::cmp()
 *****************************************************************************/
 
 #ifdef __GNUC__
-template class List<Item_buff>;
-template class List_iterator<Item_buff>;
+template class List<Cached_item>;
+template class List_iterator<Cached_item>;
 #endif

sql/item_func.cc

@@ -161,7 +161,7 @@ bool Item_func::agg_arg_charsets(DTCollation &coll,
   }
 
   THD *thd= current_thd;
-  Item_arena *arena, backup;
+  Query_arena *arena, backup;
   bool res= FALSE;
   /*
     In case we're in statement prepare, create conversion item

sql/item_subselect.cc

@@ -340,7 +340,7 @@ Item_singlerow_subselect::select_transformer(JOIN *join)
     return RES_OK;
 
   SELECT_LEX *select_lex= join->select_lex;
-  Item_arena *arena= thd->current_arena;
+  Query_arena *arena= thd->current_arena;
  
   if (!select_lex->master_unit()->first_select()->next_select() &&
       !select_lex->table_list.elements &&
@@ -1164,7 +1164,7 @@ Item_in_subselect::select_transformer(JOIN *join)
 Item_subselect::trans_res
 Item_in_subselect::select_in_like_transformer(JOIN *join, Comp_creator *func)
 {
-  Item_arena *arena, backup;
+  Query_arena *arena, backup;
   SELECT_LEX *current= thd->lex->current_select, *up;
   const char *save_where= thd->where;
   Item_subselect::trans_res res= RES_ERROR;

sql/sp_head.cc

@@ -310,12 +310,12 @@ sp_head::operator delete(void *ptr, size_t size)
 
 
 sp_head::sp_head()
-  :Item_arena((bool)FALSE), m_returns_cs(NULL), m_has_return(FALSE),
+  :Query_arena((bool)FALSE), m_returns_cs(NULL), m_has_return(FALSE),
    m_simple_case(FALSE), m_multi_results(FALSE), m_in_handler(FALSE)
 {
   extern byte *
     sp_table_key(const byte *ptr, uint *plen, my_bool first);
-  extern byte 
+  extern byte
     *sp_lex_sp_key(const byte *ptr, uint *plen, my_bool first);
   DBUG_ENTER("sp_head::sp_head");
 
@@ -574,7 +574,7 @@ sp_head::execute(THD *thd)
   sp_rcontext *ctx;
   int ret= 0;
   uint ip= 0;
-  Item_arena *old_arena;
+  Query_arena *old_arena;
   query_id_t old_query_id;
   TABLE *old_derived_tables;
   LEX *old_lex;
@@ -2312,7 +2312,7 @@ sp_head::add_used_tables_to_table_list(THD *thd,
                                        TABLE_LIST ***query_tables_last_ptr)
 {
   uint i;
-  Item_arena *arena, backup;
+  Query_arena *arena, backup;
   bool result= FALSE;
   DBUG_ENTER("sp_head::add_used_tables_to_table_list");
 

sql/sp_head.h

@@ -74,7 +74,7 @@ sp_name *
 sp_name_current_db_new(THD *thd, LEX_STRING name);
 
 
-class sp_head :private Item_arena
+class sp_head :private Query_arena
 {
   sp_head(const sp_head &);	/* Prevent use of these */
   void operator=(sp_head &);

sql/sql_base.cc

@@ -3020,7 +3020,7 @@ int setup_wild(THD *thd, TABLE_LIST *tables, List<Item> &fields,
 
   Item *item;
   List_iterator<Item> it(fields);
-  Item_arena *arena, backup;
+  Query_arena *arena, backup;
   DBUG_ENTER("setup_wild");
 
   /*
@@ -3304,7 +3304,7 @@ bool get_key_map_from_key_list(key_map *map, TABLE *table,
     any_privileges	0 If we should ensure that we have SELECT privileges
 		          for all columns
                         1 If any privilege is ok
-    allocate_view_names if true view names will be copied to current Item_arena
+    allocate_view_names if true view names will be copied to current Query_arena
                         memory (made for SP/PS)
   RETURN
     0	ok
@@ -3561,7 +3561,7 @@ insert_fields(THD *thd, TABLE_LIST *tables, const char *db_name,
 int setup_conds(THD *thd, TABLE_LIST *tables, TABLE_LIST *leaves, COND **conds)
 {
   SELECT_LEX *select_lex= thd->lex->current_select;
-  Item_arena *arena= thd->current_arena, backup;
+  Query_arena *arena= thd->current_arena, backup;
   bool save_wrapper= thd->lex->current_select->no_wrap_view_item;
   TABLE_LIST *table= NULL;	// For HP compilers
   DBUG_ENTER("setup_conds");

sql/sql_class.cc

@@ -1478,14 +1478,14 @@ void select_dumpvar::cleanup()
   Create arena for already constructed THD.
 
   SYNOPSYS
-    Item_arena()
+    Query_arena()
       thd - thread for which arena is created
 
   DESCRIPTION
     Create arena for already existing THD using its variables as parameters
     for memory root initialization.
 */
-Item_arena::Item_arena(THD* thd)
+Query_arena::Query_arena(THD* thd)
   :free_list(0), mem_root(&main_mem_root),
    state(INITIALIZED)
 {
@@ -1499,7 +1499,7 @@ Item_arena::Item_arena(THD* thd)
   Create arena and optionally initialize memory root.
 
   SYNOPSYS
-    Item_arena()
+    Query_arena()
       init_mem_root - whenever we need to initialize memory root
 
   DESCRIPTION
@@ -1511,7 +1511,7 @@ Item_arena::Item_arena(THD* thd)
     its memory root in THD::init_for_queries() before execution of real
     statements.
 */
-Item_arena::Item_arena(bool init_mem_root)
+Query_arena::Query_arena(bool init_mem_root)
   :free_list(0), mem_root(&main_mem_root),
   state(CONVENTIONAL_EXECUTION)
 {
@@ -1520,7 +1520,7 @@ Item_arena::Item_arena(bool init_mem_root)
 }
 
 
-Item_arena::Type Item_arena::type() const
+Query_arena::Type Query_arena::type() const
 {
   DBUG_ASSERT(0); /* Should never be called */
   return STATEMENT;
@@ -1532,7 +1532,7 @@ Item_arena::Type Item_arena::type() const
 */
 
 Statement::Statement(THD *thd)
-  :Item_arena(thd),
+  :Query_arena(thd),
   id(++thd->statement_id_counter),
   set_query_id(1),
   allow_sum_func(0),
@@ -1551,7 +1551,7 @@ Statement::Statement(THD *thd)
 */
 
 Statement::Statement()
-  :Item_arena((bool)TRUE),
+  :Query_arena((bool)TRUE),
   id(0),
   set_query_id(1),
   allow_sum_func(0),                            /* initialized later */
@@ -1563,7 +1563,7 @@ Statement::Statement()
 }
 
 
-Item_arena::Type Statement::type() const
+Query_arena::Type Statement::type() const
 {
   return STATEMENT;
 }
@@ -1611,9 +1611,9 @@ void THD::end_statement()
 }
 
 
-void Item_arena::set_n_backup_item_arena(Item_arena *set, Item_arena *backup)
+void Query_arena::set_n_backup_item_arena(Query_arena *set, Query_arena *backup)
 {
-  DBUG_ENTER("Item_arena::set_n_backup_item_arena");
+  DBUG_ENTER("Query_arena::set_n_backup_item_arena");
   DBUG_ASSERT(backup_arena == 0);
   backup->set_item_arena(this);
   set_item_arena(set);
@@ -1624,9 +1624,9 @@ void Item_arena::set_n_backup_item_arena(Item_arena *set, Item_arena *backup)
 }
 
 
-void Item_arena::restore_backup_item_arena(Item_arena *set, Item_arena *backup)
+void Query_arena::restore_backup_item_arena(Query_arena *set, Query_arena *backup)
 {
-  DBUG_ENTER("Item_arena::restore_backup_item_arena");
+  DBUG_ENTER("Query_arena::restore_backup_item_arena");
   set->set_item_arena(this);
   set_item_arena(backup);
 #ifndef DBUG_OFF
@@ -1635,7 +1635,7 @@ void Item_arena::restore_backup_item_arena(Item_arena *set, Item_arena *backup)
 #ifdef NOT_NEEDED_NOW
   /*
     Reset backup mem_root to avoid its freeing.
-    Since Item_arena's mem_root is freed only when it is part of Statement
+    Since Query_arena's mem_root is freed only when it is part of Statement
     we need this only if we use some Statement's arena as backup storage.
     But we do this only with THD::stmt_backup and this Statement is specially
     handled in this respect. So this code is not really needed now.
@@ -1645,7 +1645,7 @@ void Item_arena::restore_backup_item_arena(Item_arena *set, Item_arena *backup)
   DBUG_VOID_RETURN;
 }
 
-void Item_arena::set_item_arena(Item_arena *set)
+void Query_arena::set_item_arena(Query_arena *set)
 {
   mem_root=  set->mem_root;
   free_list= set->free_list;

sql/sql_class.h

@@ -646,7 +646,7 @@ typedef struct system_status_var
 void free_tmp_table(THD *thd, TABLE *entry);
 
 
-class Item_arena
+class Query_arena
 {
 public:
   /*
@@ -659,12 +659,12 @@ class Item_arena
 #ifndef DBUG_OFF
   bool backup_arena;
 #endif
-  enum enum_state 
+  enum enum_state
   {
     INITIALIZED= 0, INITIALIZED_FOR_SP= 1, PREPARED= 2,
     CONVENTIONAL_EXECUTION= 3, EXECUTED= 4, ERROR= -1
   };
-  
+
   enum_state state;
 
   /* We build without RTTI, so dynamic_cast can't be used. */
@@ -674,22 +674,22 @@ class Item_arena
   };
 
   /*
-    This constructor is used only when Item_arena is created as
-    backup storage for another instance of Item_arena.
+    This constructor is used only when Query_arena is created as
+    backup storage for another instance of Query_arena.
   */
-  Item_arena() {};
+  Query_arena() {};
   /*
     Create arena for already constructed THD using its variables as
     parameters for memory root initialization.
   */
-  Item_arena(THD *thd);
+  Query_arena(THD *thd);
   /*
     Create arena and optionally init memory root with minimal values.
-    Particularly used if Item_arena is part of Statement.
+    Particularly used if Query_arena is part of Statement.
   */
-  Item_arena(bool init_mem_root);
+  Query_arena(bool init_mem_root);
   virtual Type type() const;
-  virtual ~Item_arena() {};
+  virtual ~Query_arena() {};
 
   inline bool is_stmt_prepare() const { return state == INITIALIZED; }
   inline bool is_stmt_prepare_or_first_sp_execute() const
@@ -721,9 +721,9 @@ class Item_arena
     return ptr;
   }
 
-  void set_n_backup_item_arena(Item_arena *set, Item_arena *backup);
-  void restore_backup_item_arena(Item_arena *set, Item_arena *backup);
-  void set_item_arena(Item_arena *set);
+  void set_n_backup_item_arena(Query_arena *set, Query_arena *backup);
+  void restore_backup_item_arena(Query_arena *set, Query_arena *backup);
+  void set_item_arena(Query_arena *set);
 };
 
 
@@ -743,7 +743,7 @@ class Cursor;
   be used explicitly.
 */
 
-class Statement: public Item_arena
+class Statement: public Query_arena
 {
   Statement(const Statement &rhs);              /* not implemented: */
   Statement &operator=(const Statement &rhs);   /* non-copyable */
@@ -1107,9 +1107,9 @@ class THD :public ilink,
   Item_change_list change_list;
 
   /*
-    Current prepared Item_arena if there one, or 0
+    Current prepared Query_arena if there one, or 0
   */
-  Item_arena *current_arena;
+  Query_arena *current_arena;
   /*
     next_insert_id is set on SET INSERT_ID= #. This is used as the next
     generated auto_increment value in handler.cc
@@ -1370,13 +1370,13 @@ class THD :public ilink,
   inline void fatal_error()
   {
     is_fatal_error= 1;
-    net.report_error= 1; 
+    net.report_error= 1;
     DBUG_PRINT("error",("Fatal error set"));
   }
   inline CHARSET_INFO *charset() { return variables.character_set_client; }
   void update_charset();
 
-  inline Item_arena *change_arena_if_needed(Item_arena *backup)
+  inline Query_arena *change_arena_if_needed(Query_arena *backup)
   {
     /*
       use new arena if we are in a prepared statements and we have not

sql/sql_lex.cc

@@ -1484,8 +1484,8 @@ bool st_select_lex::setup_ref_array(THD *thd, uint order_group_num)
     We have to create array in prepared statement memory if it is
     prepared statement
   */
-  Item_arena *arena= thd->current_arena;
-  return (ref_pointer_array= 
+  Query_arena *arena= thd->current_arena;
+  return (ref_pointer_array=
           (Item **)arena->alloc(sizeof(Item*) *
                                 (item_list.elements +
                                  select_n_having_items +

sql/sql_prepare.cc

@@ -104,7 +104,7 @@ class Prepared_statement: public Statement
   Prepared_statement(THD *thd_arg);
   virtual ~Prepared_statement();
   void setup_set_params();
-  virtual Item_arena::Type type() const;
+  virtual Query_arena::Type type() const;
 };
 
 static void execute_stmt(THD *thd, Prepared_statement *stmt,
@@ -132,7 +132,7 @@ find_prepared_statement(THD *thd, ulong id, const char *where)
 {
   Statement *stmt= thd->stmt_map.find(id);
 
-  if (stmt == 0 || stmt->type() != Item_arena::PREPARED_STATEMENT)
+  if (stmt == 0 || stmt->type() != Query_arena::PREPARED_STATEMENT)
   {
     char llbuf[22];
     my_error(ER_UNKNOWN_STMT_HANDLER, MYF(0), sizeof(llbuf), llstr(id, llbuf),
@@ -1786,7 +1786,7 @@ bool mysql_stmt_prepare(THD *thd, char *packet, uint packet_length,
   {
     stmt->setup_set_params();
     init_stmt_after_parse(thd, stmt->lex);
-    stmt->state= Item_arena::PREPARED;
+    stmt->state= Query_arena::PREPARED;
   }
   DBUG_RETURN(!stmt);
 }
@@ -1956,7 +1956,7 @@ void mysql_stmt_execute(THD *thd, char *packet, uint packet_length)
   DBUG_PRINT("exec_query:", ("%s", stmt->query));
 
   /* Check if we got an error when sending long data */
-  if (stmt->state == Item_arena::ERROR)
+  if (stmt->state == Query_arena::ERROR)
   {
     my_message(stmt->last_errno, stmt->last_error, MYF(0));
     DBUG_VOID_RETURN;
@@ -2156,8 +2156,8 @@ static void execute_stmt(THD *thd, Prepared_statement *stmt,
   thd->set_statement(&thd->stmt_backup);
   thd->current_arena= thd;
 
-  if (stmt->state == Item_arena::PREPARED)
-    stmt->state= Item_arena::EXECUTED;
+  if (stmt->state == Query_arena::PREPARED)
+    stmt->state= Query_arena::EXECUTED;
   DBUG_VOID_RETURN;
 }
 
@@ -2246,7 +2246,7 @@ void mysql_stmt_reset(THD *thd, char *packet)
   if (stmt->cursor && stmt->cursor->is_open())
     stmt->cursor->close();
 
-  stmt->state= Item_arena::PREPARED;
+  stmt->state= Query_arena::PREPARED;
 
   /*
     Clear parameters from data which could be set by
@@ -2334,7 +2334,7 @@ void mysql_stmt_get_longdata(THD *thd, char *packet, ulong packet_length)
   if (param_number >= stmt->param_count)
   {
     /* Error will be sent in execute call */
-    stmt->state= Item_arena::ERROR;
+    stmt->state= Query_arena::ERROR;
     stmt->last_errno= ER_WRONG_ARGUMENTS;
     sprintf(stmt->last_error, ER(ER_WRONG_ARGUMENTS),
             "mysql_stmt_send_long_data");
@@ -2350,7 +2350,7 @@ void mysql_stmt_get_longdata(THD *thd, char *packet, ulong packet_length)
   if (param->set_longdata(thd->extra_data, thd->extra_length))
 #endif
   {
-    stmt->state= Item_arena::ERROR;
+    stmt->state= Query_arena::ERROR;
     stmt->last_errno= ER_OUTOFMEMORY;
     sprintf(stmt->last_error, ER(ER_OUTOFMEMORY), 0);
   }
@@ -2401,7 +2401,7 @@ Prepared_statement::~Prepared_statement()
 }
 
 
-Item_arena::Type Prepared_statement::type() const
+Query_arena::Type Prepared_statement::type() const
 {
   return PREPARED_STATEMENT;
 }

sql/sql_select.cc

@@ -136,7 +136,7 @@ end_unique_update(JOIN *join, JOIN_TAB *join_tab, bool end_of_records);
 static enum_nested_loop_state
 end_write_group(JOIN *join, JOIN_TAB *join_tab, bool end_of_records);
 
-static int test_if_group_changed(List<Item_buff> &list);
+static int test_if_group_changed(List<Cached_item> &list);
 static int join_read_const_table(JOIN_TAB *tab, POSITION *pos);
 static int join_read_system(JOIN_TAB *tab);
 static int join_read_const(JOIN_TAB *tab);
@@ -580,7 +580,7 @@ JOIN::optimize()
       MEMROOT for prepared statements and stored procedures.
     */
 
-    Item_arena *arena= thd->current_arena, backup;
+    Query_arena *arena= thd->current_arena, backup;
     if (arena->is_conventional())
       arena= 0;                                   // For easier test
     else
@@ -12301,7 +12301,7 @@ alloc_group_fields(JOIN *join,ORDER *group)
   {
     for (; group ; group=group->next)
     {
-      Item_buff *tmp=new_Item_buff(join->thd, *group->item);
+      Cached_item *tmp=new_Cached_item(join->thd, *group->item);
       if (!tmp || join->group_fields.push_front(tmp))
 	return TRUE;
     }
@@ -12312,12 +12312,12 @@ alloc_group_fields(JOIN *join,ORDER *group)
 
 
 static int
-test_if_group_changed(List<Item_buff> &list)
+test_if_group_changed(List<Cached_item> &list)
 {
   DBUG_ENTER("test_if_group_changed");
-  List_iterator<Item_buff> li(list);
+  List_iterator<Cached_item> li(list);
   int idx= -1,i;
-  Item_buff *buff;
+  Cached_item *buff;
 
   for (i=(int) list.elements-1 ; (buff=li++) ; i--)
   {

sql/sql_select.h

@@ -178,7 +178,7 @@ class JOIN :public Sql_alloc
   table_map const_table_map,found_const_table_map,outer_join;
   ha_rows  send_records,found_records,examined_rows,row_limit, select_limit;
   /*
-    Used to fetch no more than given amount of rows per one 
+    Used to fetch no more than given amount of rows per one
     fetch operation of server side cursor.
     The value is checked in end_send and end_send_group in fashion, similar
     to offset_limit_cnt:
@@ -190,7 +190,7 @@ class JOIN :public Sql_alloc
   POSITION positions[MAX_TABLES+1],best_positions[MAX_TABLES+1];
   double   best_read;
   List<Item> *fields;
-  List<Item_buff> group_fields, group_fields_cache;
+  List<Cached_item> group_fields, group_fields_cache;
   TABLE    *tmp_table;
   // used to store 2 possible tmp table of SELECT
   TABLE    *exec_tmp_table1, *exec_tmp_table2;
@@ -370,7 +370,7 @@ class JOIN :public Sql_alloc
   statement for many cursors.
 */
 
-class Cursor: public Sql_alloc, public Item_arena
+class Cursor: public Sql_alloc, public Query_arena
 {
   JOIN *join;
   SELECT_LEX_UNIT *unit;
@@ -396,7 +396,7 @@ class Cursor: public Sql_alloc, public Item_arena
   void close();
 
   void set_unit(SELECT_LEX_UNIT *unit_arg) { unit= unit_arg; }
-  Cursor() :Item_arena(TRUE), join(0), unit(0) {}
+  Cursor() :Query_arena(TRUE), join(0), unit(0) {}
   ~Cursor();
 };
 

sql/sql_union.cc

@@ -274,7 +274,7 @@ bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
       all collations together for UNION.
     */
     List_iterator_fast<Item> tp(types);
-    Item_arena *arena= thd->current_arena;
+    Query_arena *arena= thd->current_arena;
     Item *type;
 
     while ((type= tp++))
@@ -308,7 +308,7 @@ bool st_select_lex_unit::prepare(THD *thd_arg, select_result *sel_result,
     if (!item_list.elements)
     {
       Field **field;
-      Item_arena *tmp_arena,backup;
+      Query_arena *tmp_arena,backup;
       tmp_arena= thd->change_arena_if_needed(&backup);
 
       for (field= table->field; *field; field++)

sql/sql_view.cc

@@ -579,7 +579,7 @@ mysql_make_view(File_parser *parser, TABLE_LIST *table)
     For now we assume that tables will not be changed during PS life (it
     will be TRUE as far as we make new table cache).
   */
-  Item_arena *arena= thd->current_arena, backup;
+  Query_arena *arena= thd->current_arena, backup;
   if (arena->is_conventional())
     arena= 0;
   else

sql/sql_yacc.yy

@@ -52,7 +52,7 @@ const LEX_STRING null_lex_str={0,0};
 		      ER_WARN_DEPRECATED_SYNTAX,                    \
 		      ER(ER_WARN_DEPRECATED_SYNTAX), (A), (B));
 
-#define TEST_ASSERT(A)                  \
+#define YYERROR_UNLESS(A)                  \
   if (!(A))                             \
   {					\
     yyerror(ER(ER_SYNTAX_ERROR));	\
@@ -5094,7 +5094,7 @@ table_ref:
         ;
 
 join_table_list:
-	derived_table_list		{ TEST_ASSERT($$=$1); }
+	derived_table_list		{ YYERROR_UNLESS($$=$1); }
 	;
 
 /* Warning - may return NULL in case of incomplete SELECT */
@@ -5102,41 +5102,41 @@ derived_table_list:
         table_ref { $$=$1; }
         | derived_table_list ',' table_ref
           {
-            TEST_ASSERT($1 && ($$=$3));
+            YYERROR_UNLESS($1 && ($$=$3));
           }
         ;
 
 join_table:
-        table_ref normal_join table_ref { TEST_ASSERT($1 && ($$=$3)); }
+        table_ref normal_join table_ref { YYERROR_UNLESS($1 && ($$=$3)); }
 	| table_ref STRAIGHT_JOIN table_factor
-	  { TEST_ASSERT($1 && ($$=$3)); $3->straight=1; }
+	  { YYERROR_UNLESS($1 && ($$=$3)); $3->straight=1; }
 	| table_ref normal_join table_ref ON expr
-	  { TEST_ASSERT($1 && ($$=$3)); add_join_on($3,$5); }
+	  { YYERROR_UNLESS($1 && ($$=$3)); add_join_on($3,$5); }
         | table_ref STRAIGHT_JOIN table_factor ON expr
-          { TEST_ASSERT($1 && ($$=$3)); $3->straight=1; add_join_on($3,$5); }
+          { YYERROR_UNLESS($1 && ($$=$3)); $3->straight=1; add_join_on($3,$5); }
 	| table_ref normal_join table_ref
 	  USING
 	  {
 	    SELECT_LEX *sel= Select;
-            TEST_ASSERT($1 && $3);
+            YYERROR_UNLESS($1 && $3);
             sel->save_names_for_using_list($1, $3);
 	  }
 	  '(' using_list ')'
 	  { add_join_on($3,$7); $$=$3; }
 
 	| table_ref LEFT opt_outer JOIN_SYM table_ref ON expr
-	  { TEST_ASSERT($1 && $5); add_join_on($5,$7); $5->outer_join|=JOIN_TYPE_LEFT; $$=$5; }
+	  { YYERROR_UNLESS($1 && $5); add_join_on($5,$7); $5->outer_join|=JOIN_TYPE_LEFT; $$=$5; }
 	| table_ref LEFT opt_outer JOIN_SYM table_factor
 	  {
 	    SELECT_LEX *sel= Select;
-            TEST_ASSERT($1 && $5);
+            YYERROR_UNLESS($1 && $5);
             sel->save_names_for_using_list($1, $5);
 	  }
 	  USING '(' using_list ')'
 	  { add_join_on($5,$9); $5->outer_join|=JOIN_TYPE_LEFT; $$=$5; }
 	| table_ref NATURAL LEFT opt_outer JOIN_SYM table_factor
 	  {
-            TEST_ASSERT($1 && $6);
+            YYERROR_UNLESS($1 && $6);
 	    add_join_natural($1,$6);
 	    $6->outer_join|=JOIN_TYPE_LEFT;
 	    $$=$6;
@@ -5144,7 +5144,7 @@ join_table:
 	| table_ref RIGHT opt_outer JOIN_SYM table_ref ON expr
           {
 	    LEX *lex= Lex;
-            TEST_ASSERT($1 && $5);
+            YYERROR_UNLESS($1 && $5);
             if (!($$= lex->current_select->convert_right_join()))
               YYABORT;
             add_join_on($$, $7);
@@ -5152,7 +5152,7 @@ join_table:
 	| table_ref RIGHT opt_outer JOIN_SYM table_factor
 	  {
 	    SELECT_LEX *sel= Select;
-            TEST_ASSERT($1 && $5);
+            YYERROR_UNLESS($1 && $5);
             sel->save_names_for_using_list($1, $5);
 	  }
 	  USING '(' using_list ')'
@@ -5164,14 +5164,14 @@ join_table:
           }
 	| table_ref NATURAL RIGHT opt_outer JOIN_SYM table_factor
 	  {
-            TEST_ASSERT($1 && $6);
+            YYERROR_UNLESS($1 && $6);
 	    add_join_natural($6,$1);
 	    LEX *lex= Lex;
             if (!($$= lex->current_select->convert_right_join()))
               YYABORT;
 	  }
 	| table_ref NATURAL JOIN_SYM table_factor
-	  { TEST_ASSERT($1 && ($$=$4)); add_join_natural($1,$4); };
+	  { YYERROR_UNLESS($1 && ($$=$4)); add_join_natural($1,$4); };
 
 
 normal_join:
@@ -5200,7 +5200,7 @@ table_factor:
           sel->add_joined_table($$);
 	}
 	| '{' ident table_ref LEFT OUTER JOIN_SYM table_ref ON expr '}'
-	  { TEST_ASSERT($3 && $7); add_join_on($7,$9); $7->outer_join|=JOIN_TYPE_LEFT; $$=$7; }
+	  { YYERROR_UNLESS($3 && $7); add_join_on($7,$9); $7->outer_join|=JOIN_TYPE_LEFT; $$=$7; }
 	| select_derived_init get_select_lex select_derived2
           {
             LEX *lex= Lex;
@@ -8731,21 +8731,21 @@ xa: XA_SYM begin_or_start xid opt_join_or_resume
 
 xid: text_string
      {
-       TEST_ASSERT($1->length() <= MAXGTRIDSIZE);
+       YYERROR_UNLESS($1->length() <= MAXGTRIDSIZE);
        if (!(Lex->xid=(XID *)YYTHD->alloc(sizeof(XID))))
          YYABORT;
        Lex->xid->set(1L, $1->ptr(), $1->length(), 0, 0);
      }
      | text_string ',' text_string
      {
-       TEST_ASSERT($1->length() <= MAXGTRIDSIZE && $3->length() <= MAXBQUALSIZE);
+       YYERROR_UNLESS($1->length() <= MAXGTRIDSIZE && $3->length() <= MAXBQUALSIZE);
        if (!(Lex->xid=(XID *)YYTHD->alloc(sizeof(XID))))
          YYABORT;
        Lex->xid->set(1L, $1->ptr(), $1->length(), $3->ptr(), $3->length());
      }
      | text_string ',' text_string ',' ulong_num
      {
-       TEST_ASSERT($1->length() <= MAXGTRIDSIZE && $3->length() <= MAXBQUALSIZE);
+       YYERROR_UNLESS($1->length() <= MAXGTRIDSIZE && $3->length() <= MAXBQUALSIZE);
        if (!(Lex->xid=(XID *)YYTHD->alloc(sizeof(XID))))
          YYABORT;
        Lex->xid->set($5, $1->ptr(), $1->length(), $3->ptr(), $3->length());

sql/table.cc

@@ -1926,7 +1926,7 @@ bool st_table_list::setup_ancestor(THD *thd, Item **conds,
       (check_opt_type == VIEW_CHECK_CASCADED &&
        ancestor->check_option))
   {
-    Item_arena *arena= thd->current_arena, backup;
+    Query_arena *arena= thd->current_arena, backup;
     TABLE_LIST *tbl= this;
     if (arena->is_conventional())
       arena= 0;                                   // For easier test
@@ -2016,7 +2016,7 @@ bool st_table_list::setup_ancestor(THD *thd, Item **conds,
   /* full text function moving to current select */
   if (view->select_lex.ftfunc_list->elements)
   {
-    Item_arena *arena= thd->current_arena, backup;
+    Query_arena *arena= thd->current_arena, backup;
     if (arena->is_conventional())
       arena= 0;                                   // For easier test
     else