Return a warning for DROP DATABASE/TABLE IF EXISTS <non_existing_db/table(s)>

sql/mysql_priv.h

@@ -321,7 +321,6 @@ void free_items(Item *item);
 bool alloc_query(THD *thd, char *packet, ulong packet_length);
 void mysql_init_select(LEX *lex);
 void mysql_init_query(THD *thd);
-void mysql_reset_errors(THD *thd);
 bool mysql_new_select(LEX *lex, bool move_down);
 void create_select_for_variable(const char *var_name);
 void mysql_init_multi_delete(LEX *lex);
@@ -526,6 +525,8 @@ int check_insert_fields(THD *thd,TABLE *table,List<Item> &fields,
 /* sql_error.cc */
 void push_warning(THD *thd, MYSQL_ERROR::enum_warning_level level, uint code,
 		  const char *msg);
+void store_warning(THD *thd, uint errcode, ...);
+void mysql_reset_errors(THD *thd);
 my_bool mysqld_show_warnings(THD *thd, ulong levels_to_show);
 
 /* sql_handler.cc */

sql/sql_db.cc

@@ -331,8 +331,12 @@ int mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent)
       error= -1;
       my_error(ER_DB_DROP_EXISTS,MYF(0),db);
     }
-    else if (!silent)
+    else
+    {
+      store_warning(thd,ER_DB_DROP_EXISTS,db);
+      if (!silent)
         send_ok(thd,0);
+    }
     goto exit;
   }
   pthread_mutex_lock(&LOCK_open);

sql/sql_error.cc

@@ -104,6 +104,32 @@ void push_warning(THD *thd, MYSQL_ERROR::enum_warning_level level, uint code,
   thd->total_warn_count++;
 }
 
+/*
+  Store warning to the list
+*/
+
+void store_warning(THD *thd, uint errcode, ...)
+{
+  va_list args;
+  const   char *format;
+  char    warning[ERRMSGSIZE+20];
+  DBUG_ENTER("store_warning");  
+  DBUG_PRINT("enter",("warning: %u",errcode));
+  
+  va_start(args,errcode);
+  if (errcode)
+    format= ER(errcode);
+  else
+  {
+    format=va_arg(args,char*);
+    errcode= ER_UNKNOWN_ERROR;
+  }
+  (void) vsprintf (warning,format,args);
+  va_end(args);
+  push_warning(thd, MYSQL_ERROR::WARN_LEVEL_WARN, errcode, warning);
+  DBUG_VOID_RETURN;
+}
+
 
 /*
   Send all notes, errors or warnings to the client in a result set

sql/sql_table.cc

@@ -163,8 +163,10 @@ int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists,
 
     if (access(path,F_OK))
     {
-      if (!if_exists)
-	error=1;
+      if (if_exists)
+        store_warning(thd, ER_BAD_TABLE_ERROR, table->real_name);
+      else
+        error= 1;
     }
     else
     {