after review PS fixes

sql/item_cmpfunc.cc:
  merged in one if
sql/mysql_priv.h:
  removed unused paremeter of check_one_table_access
  declaration of new function for SP share code
sql/set_var.cc:
  function descriotion added
  unneeded parantses removed
sql/sql_acl.cc:
  new parameter to limit number of checked tables for check_grant
sql/sql_acl.h:
  new parameter to limit number of checked tables for check_grant
sql/sql_delete.cc:
  preparation moved in separate function
sql/sql_insert.cc:
  preparation moved in separate function
sql/sql_lex.cc:
  comment style fixed
  unneeded assignment removed
sql/sql_parse.cc:
  new parameter to limit number of checked tables for check_grant
  table list manipulation removed (because of above)
  new precheck function
sql/sql_prepare.cc:
  function rewrited to shere code with sql_prepare.cc
  flow control fixed
sql/sql_show.cc:
  new parameter to limit number of checked tables for check_grant
sql/sql_update.cc:
  preparation moved in separate function
sql/table.h:
  flag renamed

sql/item_cmpfunc.cc

@@ -477,9 +477,8 @@ bool Item_in_optimizer::fix_left(THD *thd,
 				 struct st_table_list *tables,
 				 Item **ref)
 {
-  if ((!args[0]->fixed && args[0]->fix_fields(thd, tables, args)))
-    return 1;
-  if (!cache && !(cache= Item_cache::get_cache(args[0]->result_type())))
+  if (!args[0]->fixed && args[0]->fix_fields(thd, tables, args) ||
+      !cache && !(cache= Item_cache::get_cache(args[0]->result_type())))
     return 1;
 
   cache->setup(args[0]);

sql/mysql_priv.h

@@ -348,12 +348,17 @@ void cleanup_items(Item *item);
 class THD;
 void close_thread_tables(THD *thd, bool locked=0, bool skip_derived=0);
 int check_one_table_access(THD *thd, ulong privilege,
-			   TABLE_LIST *tables, bool no_errors);
+			   TABLE_LIST *tables);
 bool check_merge_table_access(THD *thd, char *db,
 			      TABLE_LIST *table_list);
 int multi_update_precheck(THD *thd, TABLE_LIST *tables);
 int multi_delete_precheck(THD *thd, TABLE_LIST *tables, uint *table_count);
 int insert_select_precheck(THD *thd, TABLE_LIST *tables);
+int update_precheck(THD *thd, TABLE_LIST *tables);
+int delete_precheck(THD *thd, TABLE_LIST *tables);
+int insert_precheck(THD *thd, TABLE_LIST *tables, bool update);
+int create_table_precheck(THD *thd, TABLE_LIST *tables,
+			  TABLE_LIST *create_table);
 #include "sql_class.h"
 #include "opt_range.h"
 
@@ -532,6 +537,9 @@ bool mysql_rename_table(enum db_type base,
 int mysql_create_index(THD *thd, TABLE_LIST *table_list, List<Key> &keys);
 int mysql_drop_index(THD *thd, TABLE_LIST *table_list,
 		     List<Alter_drop> &drop_list);
+int mysql_prepare_update(THD *thd, TABLE_LIST *table_list,
+			 TABLE_LIST *update_table_list,
+			 Item **conds, uint order_num, ORDER *order);
 int mysql_update(THD *thd,TABLE_LIST *tables,List<Item> &fields,
 		 List<Item> &values,COND *conds,
                  uint order_num, ORDER *order, ha_rows limit,
@@ -541,9 +549,15 @@ int mysql_multi_update(THD *thd, TABLE_LIST *table_list,
 		       COND *conds, ulong options,
 		       enum enum_duplicates handle_duplicates,
 		       SELECT_LEX_UNIT *unit, SELECT_LEX *select_lex);
+int mysql_prepare_insert(THD *thd, TABLE_LIST *table_list,
+			 TABLE_LIST *insert_table_list, TABLE *table,
+			 List<Item> &fields, List_item *values,
+			 List<Item> &update_fields,
+			 List<Item> &update_values, enum_duplicates duplic);
 int mysql_insert(THD *thd,TABLE_LIST *table,List<Item> &fields,
 		 List<List_item> &values, List<Item> &update_fields,
 		 List<Item> &update_values, enum_duplicates flag);
+int mysql_prepare_delete(THD *thd, TABLE_LIST *table_list, Item **conds);
 int mysql_delete(THD *thd, TABLE_LIST *table, COND *conds, SQL_LIST *order,
                  ha_rows rows, ulong options);
 int mysql_truncate(THD *thd, TABLE_LIST *table_list, bool dont_send_ok=0);

sql/set_var.cc

@@ -2529,6 +2529,18 @@ int set_var::check(THD *thd)
 }
 
 
+/*
+  Check variable, but without assigning value (used by PS)
+
+  SYNOPSIS
+    set_var::light_check()
+    thd		thread handler
+
+  RETURN VALUE
+    0	ok
+    1	ERROR, message sent (normally no variables was updated)
+    -1  ERROR, message not sent
+*/
 int set_var::light_check(THD *thd)
 {
   if (var->check_type(type))
@@ -2538,7 +2550,7 @@ int set_var::light_check(THD *thd)
 	     var->name);
     return -1;
   }
-  if ((type == OPT_GLOBAL && check_global_access(thd, SUPER_ACL)))
+  if (type == OPT_GLOBAL && check_global_access(thd, SUPER_ACL))
     return 1;
 
   if (value && (value->fix_fields(thd, 0, &value) || value->check_cols(1)))
@@ -2574,6 +2586,18 @@ int set_var_user::check(THD *thd)
 }
 
 
+/*
+  Check variable, but without assigning value (used by PS)
+
+  SYNOPSIS
+    set_var_user::light_check()
+    thd		thread handler
+
+  RETURN VALUE
+    0	ok
+    1	ERROR, message sent (normally no variables was updated)
+    -1  ERROR, message not sent
+*/
 int set_var_user::light_check(THD *thd)
 {
   /*

sql/sql_acl.cc

@@ -1388,7 +1388,7 @@ static bool test_if_create_new_users(THD *thd)
 		      thd->priv_user, tl.db, 0);
     if (!(db_access & INSERT_ACL))
     {
-      if (check_grant(thd,INSERT_ACL,&tl,0,1))
+      if (check_grant(thd, INSERT_ACL, &tl, 0, UINT_MAX, 1))
 	create_new_users=0;
     }
   }
@@ -2650,7 +2650,7 @@ void grant_reload(THD *thd)
 ****************************************************************************/
 
 bool check_grant(THD *thd, ulong want_access, TABLE_LIST *tables,
-		 uint show_table, bool no_errors)
+		 uint show_table, uint number, bool no_errors)
 {
   TABLE_LIST *table;
   char *user = thd->priv_user;
@@ -2660,7 +2660,7 @@ bool check_grant(THD *thd, ulong want_access, TABLE_LIST *tables,
     return 0;					// ok
 
   rw_rdlock(&LOCK_grant);
-  for (table=tables; table ;table=table->next)
+  for (table= tables; table && number--; table= table->next)
   {
     if (!(~table->grant.privilege & want_access) || table->derived)
     {

sql/sql_acl.h

@@ -154,7 +154,7 @@ my_bool grant_init(THD *thd);
 void grant_free(void);
 void grant_reload(THD *thd);
 bool check_grant(THD *thd, ulong want_access, TABLE_LIST *tables,
-		 uint show_command, bool dont_print_error);
+		 uint show_command, uint number, bool dont_print_error);
 bool check_grant_column (THD *thd,TABLE *table, const char *name, uint length,
 			 uint show_command=0);
 bool check_grant_all_columns(THD *thd, ulong want_access, TABLE *table);
@@ -168,6 +168,6 @@ int mysql_drop_user(THD *thd, List <LEX_USER> &list);
 int mysql_revoke_all(THD *thd, List <LEX_USER> &list);
 
 #ifdef NO_EMBEDDED_ACCESS_CHECKS
-#define check_grant(A,B,C,D,E) 0
+#define check_grant(A,B,C,D,E,F) 0
 #define check_grant_db(A,B) 0
 #endif

sql/sql_delete.cc

@@ -37,8 +37,6 @@ int mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds, SQL_LIST *order,
   bool 		using_limit=limit != HA_POS_ERROR;
   bool		transactional_table, log_delayed, safe_update, const_cond; 
   ha_rows	deleted;
-  TABLE_LIST    *delete_table_list= (TABLE_LIST*) 
-    thd->lex->select_lex.table_list.first;
   DBUG_ENTER("mysql_delete");
 
   if ((open_and_lock_tables(thd, table_list)))
@@ -47,15 +45,9 @@ int mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds, SQL_LIST *order,
   table->file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK);
   thd->proc_info="init";
   table->map=1;
-  if (setup_conds(thd, delete_table_list, &conds) || 
-      setup_ftfuncs(&thd->lex->select_lex))
-    DBUG_RETURN(-1);
-  if (find_real_table_in_list(table_list->next, 
-			      table_list->db, table_list->real_name))
-  {
-    my_error(ER_UPDATE_TABLE_USED, MYF(0), table_list->real_name);
-    DBUG_RETURN(-1);
-  }
+
+  if ((error= mysql_prepare_delete(thd, table_list, &conds)))
+    DBUG_RETURN(error);
 
   const_cond= (!conds || conds->const_item());
   safe_update=test(thd->options & OPTION_SAFE_UPDATES);
@@ -246,6 +238,38 @@ int mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds, SQL_LIST *order,
 }
 
 
+/*
+  Prepare items in DELETE statement
+
+  SYNOPSIS
+    mysql_prepare_delete()
+    thd			- thread handler
+    table_list		- global table list
+    conds		- conditions
+
+  RETURN VALUE
+    0  - OK
+    1  - error (message is sent to user)
+    -1 - error (message is not sent to user)
+*/
+int mysql_prepare_delete(THD *thd, TABLE_LIST *table_list, Item **conds)
+{
+  TABLE_LIST *delete_table_list=
+    (TABLE_LIST*)thd->lex->select_lex.table_list.first;
+  DBUG_ENTER(" mysql_prepare_delete");
+
+  if (setup_conds(thd, delete_table_list, conds) || 
+      setup_ftfuncs(&thd->lex->select_lex))
+    DBUG_RETURN(-1);
+  if (find_real_table_in_list(table_list->next, 
+			      table_list->db, table_list->real_name))
+  {
+    my_error(ER_UPDATE_TABLE_USED, MYF(0), table_list->real_name);
+    DBUG_RETURN(-1);
+  }
+}
+
+
 /***************************************************************************
   Delete multiple tables from join 
 ***************************************************************************/

sql/sql_insert.cc

@@ -207,19 +207,10 @@ int mysql_insert(THD *thd,TABLE_LIST *table_list,
       goto abort;
   }
 
-  if (check_insert_fields(thd,table,fields,*values,1) ||
-      setup_tables(insert_table_list) ||
-      setup_fields(thd, 0, insert_table_list, *values, 0, 0, 0) ||
-      (duplic == DUP_UPDATE &&
-       (setup_fields(thd, 0, insert_table_list, update_fields, 0, 0, 0) ||
-        setup_fields(thd, 0, insert_table_list, update_values, 0, 0, 0))))
+  if (mysql_prepare_insert(thd, table_list, insert_table_list, table,
+			   fields, values, update_fields,
+			   update_values, duplic))
     goto abort;
-  if (find_real_table_in_list(table_list->next, 
-			      table_list->db, table_list->real_name))
-  {
-    my_error(ER_UPDATE_TABLE_USED, MYF(0), table_list->real_name);
-    goto abort;
-  }
 
   value_count= values->elements;
   while ((values= its++))
@@ -438,6 +429,43 @@ int mysql_insert(THD *thd,TABLE_LIST *table_list,
 }
 
 
+/*
+  Prepare items in INSERT statement
+
+  SYNOPSIS
+    mysql_prepare_update()
+    thd			- thread handler
+    table_list		- global table list
+    insert_table_list	- local table list of INSERT SELECT_LEX
+
+  RETURN VALUE
+    0  - OK
+    -1 - error (message is not sent to user)
+*/
+int mysql_prepare_insert(THD *thd, TABLE_LIST *table_list,
+			 TABLE_LIST *insert_table_list, TABLE *table,
+			 List<Item> &fields, List_item *values,
+			 List<Item> &update_fields, List<Item> &update_values,
+			 enum_duplicates duplic)
+{
+  DBUG_ENTER("mysql_prepare_insert");
+  if (check_insert_fields(thd, table, fields, *values, 1) ||
+      setup_tables(insert_table_list) ||
+      setup_fields(thd, 0, insert_table_list, *values, 0, 0, 0) ||
+      (duplic == DUP_UPDATE &&
+       (setup_fields(thd, 0, insert_table_list, update_fields, 0, 0, 0) ||
+        setup_fields(thd, 0, insert_table_list, update_values, 0, 0, 0))))
+    DBUG_RETURN(-1);
+  if (find_real_table_in_list(table_list->next, 
+			      table_list->db, table_list->real_name))
+  {
+    my_error(ER_UPDATE_TABLE_USED, MYF(0), table_list->real_name);
+    DBUG_RETURN(-1);
+  }
+  DBUG_RETURN(0);
+}
+
+
 	/* Check if there is more uniq keys after field */
 
 static int last_uniq_key(TABLE *table,uint keynr)

sql/sql_lex.cc

@@ -1634,8 +1634,10 @@ void st_select_lex::print_limit(THD *thd, String *str)
   }
 }
 
+
 /*
-  unlink first table from table lists
+  Unlink first table from global table list and first must outer select list
+    (lex->select_lex)
 
   SYNOPSIS
     unlink_first_table()
@@ -1652,9 +1654,13 @@ TABLE_LIST *st_lex::unlink_first_table(TABLE_LIST *tables,
 {
   *global_first= tables;
   *local_first= (TABLE_LIST*)select_lex.table_list.first;
-  // exclude from global table list
+  /*
+    exclude from global table list
+  */
   tables= tables->next;
-  // and from local list if it is not the same
+  /*
+    and from local list if it is not the same
+  */
   if (&select_lex != all_selects_list)
     select_lex.table_list.first= (gptr)(*local_first)->next;
   else
@@ -1663,8 +1669,9 @@ TABLE_LIST *st_lex::unlink_first_table(TABLE_LIST *tables,
   return tables;
 }
 
+
 /*
-  link unlinked first table back
+  Link table back that was unlinked with unlink_first_table()
 
   SYNOPSIS
     link_first_table_back()
@@ -1680,7 +1687,6 @@ TABLE_LIST *st_lex::link_first_table_back(TABLE_LIST *tables,
 					  TABLE_LIST *local_first)
 {
   global_first->next= tables;
-  tables= global_first;
   if (&select_lex != all_selects_list)
   {
     /*
@@ -1690,8 +1696,8 @@ TABLE_LIST *st_lex::link_first_table_back(TABLE_LIST *tables,
     select_lex.table_list.first= (gptr) local_first;
   }
   else
-    select_lex.table_list.first= (gptr) tables;
-  return tables;
+    select_lex.table_list.first= (gptr) global_first;
+  return global_first;
 }
 
 /*

sql/sql_show.cc

@@ -436,7 +436,7 @@ mysql_find_files(THD *thd,List<char> *files, const char *db,const char *path,
       table_list.db= (char*) db;
       table_list.real_name=file->name;
       table_list.grant.privilege=col_access;
-      if (check_grant(thd,TABLE_ACLS,&table_list,1,1))
+      if (check_grant(thd, TABLE_ACLS, &table_list, 1, UINT_MAX, 1))
         continue;
     }
 #endif

sql/sql_update.cc

@@ -70,8 +70,6 @@ int mysql_update(THD *thd,
   READ_RECORD	info;
   TABLE_LIST    *update_table_list= ((TABLE_LIST*) 
 				     thd->lex->select_lex.table_list.first);
-  TABLE_LIST    tables;
-  List<Item>    all_fields;
   DBUG_ENTER("mysql_update");
 
   LINT_INIT(used_index);
@@ -86,30 +84,13 @@ int mysql_update(THD *thd,
   /* Calculate "table->used_keys" based on the WHERE */
   table->used_keys=table->keys_in_use;
   table->quick_keys.clear_all();
+
 #ifndef NO_EMBEDDED_ACCESS_CHECKS
-  want_privilege=table->grant.want_privilege;
-  table->grant.want_privilege=(SELECT_ACL & ~table->grant.privilege);
+  want_privilege= table->grant.want_privilege;
 #endif
-
-  bzero((char*) &tables,sizeof(tables));	// For ORDER BY
-  tables.table= table;
-  tables.alias= table_list->alias;
-
-  if (setup_tables(update_table_list) ||
-      setup_conds(thd,update_table_list,&conds) ||
-      thd->lex->select_lex.setup_ref_array(thd, order_num) ||
-      setup_order(thd, thd->lex->select_lex.ref_pointer_array,
-		  update_table_list, all_fields, all_fields, order) ||
-      setup_ftfuncs(&thd->lex->select_lex))
-    DBUG_RETURN(-1);				/* purecov: inspected */
-
-  /* Check that we are not using table that we are updating in a sub select */
-  if (find_real_table_in_list(table_list->next, 
-			      table_list->db, table_list->real_name))
-  {
-    my_error(ER_UPDATE_TABLE_USED, MYF(0), table_list->real_name);
-    DBUG_RETURN(-1);
-  }
+  if ((error= mysql_prepare_update(thd, table_list, update_table_list,
+				   &conds, order_num, order)))
+    DBUG_RETURN(error);
 
   old_used_keys= table->used_keys;		// Keys used in WHERE
   /*
@@ -406,6 +387,59 @@ int mysql_update(THD *thd,
   DBUG_RETURN(-1);
 }
 
+/*
+  Prepare items in UPDATE statement
+
+  SYNOPSIS
+    mysql_prepare_update()
+    thd			- thread handler
+    table_list		- global table list
+    update_table_list	- local table list of UPDATE SELECT_LEX
+    conds		- conditions
+    order_num		- number of ORDER BY list entries
+    order		- ORDER BY clause list
+
+  RETURN VALUE
+    0  - OK
+    1  - error (message is sent to user)
+    -1 - error (message is not sent to user)
+*/
+int mysql_prepare_update(THD *thd, TABLE_LIST *table_list,
+			 TABLE_LIST *update_table_list,
+			 Item **conds, uint order_num, ORDER *order)
+{
+  TABLE *table= table_list->table;
+  TABLE_LIST tables;
+  List<Item> all_fields;
+  DBUG_ENTER("mysql_prepare_update");
+
+#ifndef NO_EMBEDDED_ACCESS_CHECKS
+  table->grant.want_privilege= (SELECT_ACL & ~table->grant.privilege);
+#endif
+
+  bzero((char*) &tables,sizeof(tables));	// For ORDER BY
+  tables.table= table;
+  tables.alias= table_list->alias;
+
+  if (setup_tables(update_table_list) ||
+      setup_conds(thd, update_table_list, conds) ||
+      thd->lex->select_lex.setup_ref_array(thd, order_num) ||
+      setup_order(thd, thd->lex->select_lex.ref_pointer_array,
+		  update_table_list, all_fields, all_fields, order) ||
+      setup_ftfuncs(&thd->lex->select_lex))
+    DBUG_RETURN(-1);
+
+  /* Check that we are not using table that we are updating in a sub select */
+  if (find_real_table_in_list(table_list->next, 
+			      table_list->db, table_list->real_name))
+  {
+    my_error(ER_UPDATE_TABLE_USED, MYF(0), table_list->real_name);
+    DBUG_RETURN(-1);
+  }
+
+  DBUG_RETURN(0);
+}
+
 
 /***************************************************************************
   Update multiple tables from join 

sql/table.h

@@ -194,7 +194,8 @@ typedef struct st_table_list
   bool		force_index;		/* Prefer index over table scan */
   bool          ignore_leaves;          /* Preload only non-leaf nodes */
   bool		cacheable_table;	/* stop PS caching */
-  bool		checked;		/* used in multi-upd privelege check */
+  /* used in multi-upd privelege check */
+  bool		table_in_update_from_clause;
 } TABLE_LIST;
 
 typedef struct st_changed_table_list