Review of new pushed code (XA & other)

Portability fixes and cleanups
Fixed setting of 'res' in mysql_execute_command()

sql/handler.cc

@@ -1494,16 +1494,38 @@ uint handler::get_dup_key(int error)
 }
 
 
+/*
+  Delete all files with extension from bas_ext()
+
+  SYNOPSIS
+    delete_table()
+    name		Base name of table
+
+  NOTES
+    We assume that the handler may return more extensions than
+    was actually used for the file.
+
+  RETURN
+    0   If we successfully deleted at least one file from base_ext and
+	didn't get any other errors than ENOENT    
+    #   Error from delete_file()
+*/
+
 int handler::delete_table(const char *name)
 {
-  int error=0;
+  int error= 0;
+  int enoent_or_zero= ENOENT;                   // Error if no file was deleted
+
   for (const char **ext=bas_ext(); *ext ; ext++)
   {
     if (delete_file(name,*ext,2))
     {
-      if ((error=errno) != ENOENT)
+      if ((error= my_errno) != ENOENT)
 	break;
     }
+    else
+      enoent_or_zero= 0;
+    error= enoent_or_zero;
   }
   return error;
 }

sql/handler.h

@@ -97,7 +97,7 @@
   Note: the following includes binlog and closing 0.
   so: innodb+bdb+ndb+binlog+0
 */
-#define MAX_HA 5
+#define MAX_HA 6
 
 /*
   Bits in index_ddl_flags(KEY *wanted_index)
@@ -217,11 +217,13 @@ struct xid_t {
   bool eq(long g, long b, const char *d)
   { return g == gtrid_length && b == bqual_length && !memcmp(d, data, g+b); }
   void set(LEX_STRING *l) { set(l->length, 0, l->str); }
-  void set(ulonglong l)
+  void set(ulonglong xid)
   {
+    my_xid tmp;
     set(MYSQL_XID_PREFIX_LEN, 0, MYSQL_XID_PREFIX);
-    *(ulong*)(data+MYSQL_XID_PREFIX_LEN)=server_id;
-    *(my_xid*)(data+MYSQL_XID_OFFSET)=l;
+    memcpy(data+MYSQL_XID_PREFIX_LEN, &server_id, sizeof(server_id));
+    tmp= xid;
+    memcpy(data+MYSQL_XID_OFFSET, &tmp, sizeof(tmp));
     gtrid_length=MYSQL_XID_GTRID_LEN;
   }
   void set(long g, long b, const char *d)
@@ -235,7 +237,9 @@ struct xid_t {
   void null() { formatID= -1; }
   my_xid quick_get_my_xid()
   {
-    return *(my_xid*)(data+MYSQL_XID_OFFSET);
+    my_xid tmp;
+    memcpy(&tmp, data+MYSQL_XID_OFFSET, sizeof(tmp));
+    return tmp;
   }
   my_xid get_my_xid()
   {

sql/log.cc

@@ -135,10 +135,10 @@ static int binlog_rollback(THD *thd, bool all)
   */
   DBUG_ASSERT(all && mysql_bin_log.is_open() && my_b_tell(trans_log));
   /*
-     Update the binary log with a BEGIN/ROLLBACK block if we have
-     cached some queries and we updated some non-transactional
-     table. Such cases should be rare (updating a
-     non-transactional table inside a transaction...)
+    Update the binary log with a BEGIN/ROLLBACK block if we have
+    cached some queries and we updated some non-transactional
+    table. Such cases should be rare (updating a
+    non-transactional table inside a transaction...)
   */
   if (unlikely(thd->options & OPTION_STATUS_NO_TRANS_UPDATE))
   {
@@ -919,6 +919,13 @@ bool MYSQL_LOG::reset_logs(THD* thd)
   */
   pthread_mutex_lock(&LOCK_log);
   pthread_mutex_lock(&LOCK_index);
+  /*
+    The following mutex is needed to ensure that no threads call
+    'delete thd' as we would then risk missing a 'rollback' from this
+    thread. If the transaction involved MyISAM tables, it should go
+    into binlog even on rollback.
+  */
+  (void) pthread_mutex_lock(&LOCK_thread_count);
 
   /* Save variables so that we can reopen the log */
   save_name=name;
@@ -952,6 +959,7 @@ bool MYSQL_LOG::reset_logs(THD* thd)
   my_free((gptr) save_name, MYF(0));
 
 err:
+  (void) pthread_mutex_unlock(&LOCK_thread_count);
   pthread_mutex_unlock(&LOCK_index);
   pthread_mutex_unlock(&LOCK_log);
   DBUG_RETURN(error);
@@ -1600,7 +1608,8 @@ bool MYSQL_LOG::write(Log_event* event_info)
         {
           thd->ha_data[binlog_hton.slot]= trans_log= (IO_CACHE *)
             my_malloc(sizeof(IO_CACHE), MYF(MY_ZEROFILL));
-          if (!trans_log || open_cached_file(trans_log, mysql_tmpdir, LOG_PREFIX,
+          if (!trans_log || open_cached_file(trans_log, mysql_tmpdir,
+                                             LOG_PREFIX,
                                              binlog_cache_size, MYF(MY_WME)))
           {
             my_free((gptr)trans_log, MYF(MY_ALLOW_ZERO_PTR));
@@ -1609,13 +1618,15 @@ bool MYSQL_LOG::write(Log_event* event_info)
           }
           trans_log->end_of_file= max_binlog_cache_size;
           trans_register_ha(thd,
-              thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN),
-              &binlog_hton);
+                            thd->options & (OPTION_NOT_AUTOCOMMIT |
+                                            OPTION_BEGIN),
+                            &binlog_hton);
         }
         else if (!my_b_tell(trans_log))
           trans_register_ha(thd,
-              thd->options & (OPTION_NOT_AUTOCOMMIT | OPTION_BEGIN),
-              &binlog_hton);
+                            thd->options & (OPTION_NOT_AUTOCOMMIT |
+                                            OPTION_BEGIN),
+                            &binlog_hton);
         file= trans_log;
       }
       else if (trans_log && my_b_tell(trans_log))
@@ -1630,8 +1641,8 @@ bool MYSQL_LOG::write(Log_event* event_info)
     */
 
     /*
-    1. Write first log events which describe the 'run environment'
-    of the SQL command
+      1. Write first log events which describe the 'run environment'
+      of the SQL command
     */
 
     if (thd)
@@ -1655,12 +1666,12 @@ bool MYSQL_LOG::write(Log_event* event_info)
       {
 	char buf[200];
         int written= my_snprintf(buf, sizeof(buf)-1,
-                    "SET ONE_SHOT CHARACTER_SET_CLIENT=%u,\
+                                 "SET ONE_SHOT CHARACTER_SET_CLIENT=%u,\
 COLLATION_CONNECTION=%u,COLLATION_DATABASE=%u,COLLATION_SERVER=%u",
-                             (uint) thd->variables.character_set_client->number,
-                             (uint) thd->variables.collation_connection->number,
-                             (uint) thd->variables.collation_database->number,
-                             (uint) thd->variables.collation_server->number);
+                                 (uint) thd->variables.character_set_client->number,
+                                 (uint) thd->variables.collation_connection->number,
+                                 (uint) thd->variables.collation_database->number,
+                                 (uint) thd->variables.collation_server->number);
 	Query_log_event e(thd, buf, written, 0, FALSE);
 	if (e.write(file))
 	  goto err;
@@ -1803,9 +1814,9 @@ uint MYSQL_LOG::next_file_id()
   IMPLEMENTATION
     - To support transaction over replication, we wrap the transaction
       with BEGIN/COMMIT or BEGIN/ROLLBACK in the binary log.
-      We want to write a BEGIN/ROLLBACK block when a non-transactional table was
-      updated in a transaction which was rolled back. This is to ensure that the
-      same updates are run on the slave.
+      We want to write a BEGIN/ROLLBACK block when a non-transactional table
+      was updated in a transaction which was rolled back. This is to ensure
+      that the same updates are run on the slave.
 */
 
 bool MYSQL_LOG::write(THD *thd, IO_CACHE *cache)
@@ -2481,15 +2492,13 @@ int TC_LOG_MMAP::open(const char *opt_name)
 #endif
 
   fn_format(logname,opt_name,mysql_data_home,"",MY_UNPACK_FILENAME);
-  fd= my_open(logname, O_RDWR, MYF(0));
-  if (fd == -1)
+  if ((fd= my_open(logname, O_RDWR, MYF(0))) < 0)
   {
     if (my_errno != ENOENT)
       goto err;
     if (using_heuristic_recover())
       return 1;
-    fd= my_create(logname, O_RDWR, 0, MYF(MY_WME));
-    if (fd == -1)
+    if ((fd= my_create(logname, O_RDWR, 0, MYF(MY_WME))) < 0)
       goto err;
     inited=1;
     file_length= opt_tc_log_size;
@@ -2827,7 +2836,7 @@ int TC_LOG_MMAP::recover()
   */
   if (data[sizeof(tc_log_magic)] != total_ha_2pc)
   {
-    sql_print_error("Recovery failed! You must have enabled "
+    sql_print_error("Recovery failed! You must enable "
                     "exactly %d storage engines that support "
                     "two-phase commit protocol",
                     data[sizeof(tc_log_magic)]);
@@ -2931,14 +2940,15 @@ int TC_LOG_BINLOG::open(const char *opt_name)
     if (! fdle.is_valid())
       goto err;
 
-    for (error= 0; !error ;)
+    do
     {
-      strnmov(log_name, log_info.log_file_name, sizeof(log_name));
-      if ((error= find_next_log(&log_info, 1)) != LOG_INFO_EOF)
-      {
-        sql_print_error("find_log_pos() failed (error: %d)", error);
-        goto err;
-      }
+      strmake(log_name, log_info.log_file_name, sizeof(log_name)-1);
+    } while (!(error= find_next_log(&log_info, 1)));
+
+    if (error !=  LOG_INFO_EOF)
+    {
+      sql_print_error("find_log_pos() failed (error: %d)", error);
+      goto err;
     }
 
     if ((file= open_binlog(&log, log_name, &errmsg)) < 0)

sql/log_event.cc

@@ -3099,12 +3099,14 @@ void Xid_log_event::pack_info(Protocol *protocol)
   we don't care about actual values of xids as long as
   identical numbers compare identically
 */
-Xid_log_event::Xid_log_event(const char* buf,
-                             const Format_description_log_event* description_event)
+
+Xid_log_event::
+Xid_log_event(const char* buf,
+              const Format_description_log_event *description_event)
   :Log_event(buf, description_event)
 {
   buf+= description_event->common_header_len;
-  xid=*((my_xid *)buf);
+  memcpy((char*) &xid, buf, sizeof(xid));
 }
 
 

sql/sql_acl.cc

@@ -204,20 +204,16 @@ my_bool acl_init(THD *org_thd, bool dont_read_acl_tables)
     if (lower_case_table_names)
     {
       /*
-       We make a temporary copy of the database, force it to lower case,
-       and then copy it back over the original name. We can't just update
-       the host.db pointer, because tmp_name is allocated on the stack.
+        convert db to lower case and give a warning if the db wasn't
+        already in lower case
       */
-      (void)strmov(tmp_name, host.db);
-      my_casedn_str(files_charset_info, tmp_name);
+      (void) strmov(tmp_name, host.db);
+      my_casedn_str(files_charset_info, host.db);
       if (strcmp(host.db, tmp_name) != 0)
-      {
         sql_print_warning("'host' entry '%s|%s' had database in mixed "
                           "case that has been forced to lowercase because "
                           "lower_case_table_names is set.",
                           host.host.hostname, host.db);
-        (void)strmov(host.db, tmp_name);
-      }
     }
     host.access= get_access(table,2);
     host.access= fix_rights_for_db(host.access);
@@ -432,19 +428,17 @@ my_bool acl_init(THD *org_thd, bool dont_read_acl_tables)
     if (lower_case_table_names)
     {
       /*
-       We make a temporary copy of the database, force it to lower case,
-       and then copy it back over the original name. We can't just update
-       the db.db pointer, because tmp_name is allocated on the stack.
+        convert db to lower case and give a warning if the db wasn't
+        already in lower case
       */
       (void)strmov(tmp_name, db.db);
-      my_casedn_str(files_charset_info, tmp_name);
+      my_casedn_str(files_charset_info, db.db);
       if (strcmp(db.db, tmp_name) != 0)
       {
         sql_print_warning("'db' entry '%s %s@%s' had database in mixed "
                           "case that has been forced to lowercase because "
                           "lower_case_table_names is set.",
 		          db.db, db.user, db.host.hostname, db.host.hostname);
-        (void)strmov(db.db, tmp_name);
       }
     }
     db.sort=get_sort(3,db.host.hostname,db.db,db.user);

sql/sql_base.cc

@@ -3592,23 +3592,20 @@ static void mysql_rm_tmp_tables(void)
 *****************************************************************************/
 
 /*
-** Invalidate any cache entries that are for some DB
-** We can't use hash_delete when looping hash_elements. We mark them first
-** and afterwards delete those marked unused.
+  Invalidate any cache entries that are for some DB
+
+  SYNOPSIS
+    remove_db_from_cache()
+    db		Database name. This will be in lower case if
+		lower_case_table_name is set
+
+  NOTE:
+  We can't use hash_delete when looping hash_elements. We mark them first
+  and afterwards delete those marked unused.
 */
 
 void remove_db_from_cache(const char *db)
 {
-  char name_buff[NAME_LEN+1];
-  if (db && lower_case_table_names)
-  {
-    /*
-      convert database to lower case for comparision.
-    */
-    strmake(name_buff, db, sizeof(name_buff)-1);
-    my_casedn_str(files_charset_info, name_buff);
-    db= name_buff;
-  }
   for (uint idx=0 ; idx < open_cache.records ; idx++)
   {
     TABLE *table=(TABLE*) hash_element(&open_cache,idx);

sql/sql_db.cc

@@ -576,7 +576,8 @@ bool mysql_alter_db(THD *thd, const char *db, HA_CREATE_INFO *create_info)
     mysql_rm_db()
     thd			Thread handle
     db			Database name in the case given by user
-		        It's already validated when we come here
+		        It's already validated and set to lower case
+                        (if needed) when we come here
     if_exists		Don't give error if database doesn't exists
     silent		Don't generate errors
 
@@ -589,7 +590,7 @@ bool mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent)
 {
   long deleted=0;
   int error= 0;
-  char	path[FN_REFLEN+16], tmp_db[NAME_LEN+1];
+  char	path[FN_REFLEN+16];
   MY_DIR *dirp;
   uint length;
   DBUG_ENTER("mysql_rm_db");
@@ -636,13 +637,6 @@ bool mysql_rm_db(THD *thd,char *db,bool if_exists, bool silent)
       error = 0;
     }
   }
-  if (lower_case_table_names)
-  {
-    /* Convert database to lower case */
-    strmov(tmp_db, db);
-    my_casedn_str(files_charset_info, tmp_db);
-    db= tmp_db;
-  }
   if (!silent && deleted>=0)
   {
     const char *query;

sql/sql_parse.cc

@@ -1775,8 +1775,7 @@ bool dispatch_command(enum enum_server_command command, THD *thd,
 	break;
       }
       mysql_log.write(thd,command,db);
-      mysql_rm_db(thd, (lower_case_table_names == 2 ? alias : db),
-                       0, 0);
+      mysql_rm_db(thd, db, 0, 0);
       break;
     }
 #ifndef EMBEDDED_LIBRARY
@@ -3223,8 +3222,6 @@ mysql_execute_command(THD *thd)
       /* revert changes for SP */
       lex->select_lex.table_list.first= (byte*) first_table;
     }
-    else
-      res= TRUE;
 
     if (first_table->view && !first_table->contain_auto_increment)
       thd->last_insert_id= 0; // do not show last insert ID if VIEW have not it
@@ -3309,7 +3306,7 @@ mysql_execute_command(THD *thd)
       delete result;
     }
     else
-      res= TRUE;
+      res= TRUE;                                // Error
     break;
   }
   case SQLCOM_DROP_TABLE:
@@ -3535,8 +3532,7 @@ mysql_execute_command(THD *thd)
                  ER(ER_LOCK_OR_ACTIVE_TRANSACTION), MYF(0));
       goto error;
     }
-    res=mysql_rm_db(thd, (lower_case_table_names == 2 ? alias : lex->name),
-                    lex->drop_if_exists, 0);
+    res= mysql_rm_db(thd, lex->name, lex->drop_if_exists, 0);
     break;
   }
   case SQLCOM_ALTER_DB:
@@ -3873,10 +3869,7 @@ mysql_execute_command(THD *thd)
       *sv=(*sv)->prev;
     }
     else
-    {
       my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "SAVEPOINT", lex->ident.str);
-      res= TRUE;
-    }
     break;
   }
   case SQLCOM_ROLLBACK_TO_SAVEPOINT:
@@ -3905,10 +3898,7 @@ mysql_execute_command(THD *thd)
       *sv=(*sv)->prev;
     }
     else
-    {
       my_error(ER_SP_DOES_NOT_EXIST, MYF(0), "SAVEPOINT", lex->ident.str);
-      res= TRUE;
-    }
     break;
   }
   case SQLCOM_SAVEPOINT:
@@ -3935,7 +3925,6 @@ mysql_execute_command(THD *thd)
                                                savepoint_alloc_size)) == 0)
       {
         my_error(ER_OUT_OF_RESOURCES, MYF(0));
-        res= TRUE;
         break;
       }
       newsv->name=strmake_root(&thd->transaction.mem_root,
@@ -4341,7 +4330,6 @@ mysql_execute_command(THD *thd)
       }
       thd->transaction.xa_state=XA_ACTIVE;
       send_ok(thd);
-      res=TRUE;
       break;
     }
     if (thd->lex->ident.length > MAXGTRIDSIZE || thd->lex->xa_opt != XA_NONE)
@@ -4367,7 +4355,6 @@ mysql_execute_command(THD *thd)
                    OPTION_BEGIN);
     thd->server_status|= SERVER_STATUS_IN_TRANS;
     send_ok(thd);
-    res=TRUE;
     break;
   case SQLCOM_XA_END:
     /* fake it */
@@ -4389,7 +4376,6 @@ mysql_execute_command(THD *thd)
     }
     thd->transaction.xa_state=XA_IDLE;
     send_ok(thd);
-    res=TRUE;
     break;
   case SQLCOM_XA_PREPARE:
     if (thd->transaction.xa_state != XA_IDLE)
@@ -4409,7 +4395,6 @@ mysql_execute_command(THD *thd)
       thd->transaction.xa_state=XA_NOTR;
       break;
     }
-    res=TRUE;
     thd->transaction.xa_state=XA_PREPARED;
     send_ok(thd);
     break;
@@ -4428,7 +4413,6 @@ mysql_execute_command(THD *thd)
       else
       {
         send_ok(thd);
-        res= TRUE;
       }
     }
     else
@@ -4439,7 +4423,6 @@ mysql_execute_command(THD *thd)
       else
       {
         send_ok(thd);
-        res= TRUE;
       }
     }
     else
@@ -4469,16 +4452,13 @@ mysql_execute_command(THD *thd)
     if (ha_rollback(thd))
       my_error(ER_XAER_RMERR, MYF(0));
     else
-    {
       send_ok(thd);
-      res= TRUE;
-    }
     thd->options&= ~(ulong) (OPTION_BEGIN | OPTION_STATUS_NO_TRANS_UPDATE);
     thd->server_status&= ~SERVER_STATUS_IN_TRANS;
     thd->transaction.xa_state=XA_NOTR;
     break;
   case SQLCOM_XA_RECOVER:
-    res= !mysql_xa_recover(thd);
+    res= mysql_xa_recover(thd);
     break;
   default:
     DBUG_ASSERT(0);                             /* Impossible */

sql/sql_repl.cc

@@ -454,13 +454,14 @@ impossible position";
                    (*packet)[EVENT_TYPE_OFFSET+1]));
        if ((*packet)[EVENT_TYPE_OFFSET+1] == FORMAT_DESCRIPTION_EVENT)
        {
-         binlog_can_be_corrupted= (*packet)[FLAGS_OFFSET+1] & LOG_EVENT_BINLOG_IN_USE_F;
+         binlog_can_be_corrupted= test((*packet)[FLAGS_OFFSET+1] &
+                                       LOG_EVENT_BINLOG_IN_USE_F);
          /*
            mark that this event with "log_pos=0", so the slave
            should not increment master's binlog position
            (rli->group_master_log_pos)
          */
-         int4store(packet->c_ptr()+LOG_POS_OFFSET+1, 0);
+         int4store((char*) packet->ptr()+LOG_POS_OFFSET+1, 0);
          /* send it */
          if (my_net_write(net, (char*)packet->ptr(), packet->length()))
          {
@@ -477,16 +478,21 @@ impossible position";
        }
      }
      else
+     {
        if (test_for_non_eof_log_read_errors(error, &errmsg))
          goto err;
-     /*
-        else: it's EOF, nothing to do, go on reading next events, the
-        Format_description_log_event will be found naturally if it is written.
-     */
+       /*
+         It's EOF, nothing to do, go on reading next events, the
+         Format_description_log_event will be found naturally if it is written.
+       */
+     }
      /* reset the packet as we wrote to it in any case */
      packet->set("\0", 1, &my_charset_bin);
-   } /* end of if (pos > BIN_LOG_HEADER_SIZE); if false, the
-        Format_description_log_event event will be found naturally. */
+  } /* end of if (pos > BIN_LOG_HEADER_SIZE); */
+  else
+  {
+    /* The Format_description_log_event event will be found naturally. */
+  }
 
   /* seek to the requested position, to start the requested dump */
   my_b_seek(&log, pos);			// Seek will done on next read
@@ -506,7 +512,8 @@ impossible position";
 #endif
 
       if ((*packet)[EVENT_TYPE_OFFSET+1] == FORMAT_DESCRIPTION_EVENT)
-        binlog_can_be_corrupted= (*packet)[FLAGS_OFFSET+1] & LOG_EVENT_BINLOG_IN_USE_F;
+        binlog_can_be_corrupted= test((*packet)[FLAGS_OFFSET+1] &
+                                      LOG_EVENT_BINLOG_IN_USE_F);
       else if ((*packet)[EVENT_TYPE_OFFSET+1] == STOP_EVENT)
         binlog_can_be_corrupted= FALSE;
 
@@ -755,9 +762,9 @@ int start_slave(THD* thd , MASTER_INFO* mi,  bool net_report)
     else if (server_id_supplied && *mi->host)
     {
       /*
-         If we will start SQL thread we will care about UNTIL options If
-         not and they are specified we will ignore them and warn user
-         about this fact.
+        If we will start SQL thread we will care about UNTIL options If
+        not and they are specified we will ignore them and warn user
+        about this fact.
       */
       if (thread_mask & SLAVE_SQL)
       {
@@ -772,14 +779,14 @@ int start_slave(THD* thd , MASTER_INFO* mi,  bool net_report)
              since it is checked in sql_yacc.yy
           */
           strmake(mi->rli.until_log_name, thd->lex->mi.log_file_name,
-              sizeof(mi->rli.until_log_name)-1);
+                  sizeof(mi->rli.until_log_name)-1);
         }
         else if (thd->lex->mi.relay_log_pos)
         {
           mi->rli.until_condition= RELAY_LOG_INFO::UNTIL_RELAY_POS;
           mi->rli.until_log_pos= thd->lex->mi.relay_log_pos;
           strmake(mi->rli.until_log_name, thd->lex->mi.relay_log_name,
-              sizeof(mi->rli.until_log_name)-1);
+                  sizeof(mi->rli.until_log_name)-1);
         }
         else
           clear_until_condition(&mi->rli);
@@ -810,7 +817,8 @@ int start_slave(THD* thd , MASTER_INFO* mi,  bool net_report)
 
           /* Issuing warning then started without --skip-slave-start */
           if (!opt_skip_slave_start)
-            push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_MISSING_SKIP_SLAVE, 
+            push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
+                         ER_MISSING_SKIP_SLAVE, 
                          ER(ER_MISSING_SKIP_SLAVE));
         }
 
@@ -818,7 +826,7 @@ int start_slave(THD* thd , MASTER_INFO* mi,  bool net_report)
       }
       else if (thd->lex->mi.pos || thd->lex->mi.relay_log_pos)
         push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_UNTIL_COND_IGNORED,
-            ER(ER_UNTIL_COND_IGNORED));
+                     ER(ER_UNTIL_COND_IGNORED));
 
       if (!slave_errno)
         slave_errno = start_slave_threads(0 /*no mutex */,
@@ -831,10 +839,12 @@ int start_slave(THD* thd , MASTER_INFO* mi,  bool net_report)
       slave_errno = ER_BAD_SLAVE;
   }
   else
-    //no error if all threads are already started, only a warning
+  {
+    /* no error if all threads are already started, only a warning */
     push_warning(thd, MYSQL_ERROR::WARN_LEVEL_NOTE, ER_SLAVE_WAS_RUNNING,
                  ER(ER_SLAVE_WAS_RUNNING));
-
+  }
+  
   unlock_slave_threads(mi);
 
   if (slave_errno)

sql/sql_table.cc

@@ -218,7 +218,8 @@ int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists,
       (void) unpack_filename(path,path);
     }
     if (drop_temporary ||
-        (access(path,F_OK) && ha_create_table_from_engine(thd,db,alias,TRUE)) ||
+        (access(path,F_OK) &&
+         ha_create_table_from_engine(thd,db,alias,TRUE)) ||
         (!drop_view && mysql_frm_type(path) != FRMTYPE_TABLE))
     {
       if (if_exists)
@@ -234,34 +235,28 @@ int mysql_rm_table_part2(THD *thd, TABLE_LIST *tables, bool if_exists,
       db_type table_type= get_table_type(path);
       *(end=fn_ext(path))=0;			// Remove extension for delete
       error=ha_delete_table(table_type, path);
-      if (error == ENOENT && if_exists)
-	error = 0;
+      if ((error == ENOENT || error == HA_ERR_NO_SUCH_TABLE) && if_exists)
+      {
+        /* Warn that the table did not exist in engine */
+        if (error == HA_ERR_NO_SUCH_TABLE)
+          push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
+                              ER_BAD_TABLE_ERROR, ER(ER_BAD_TABLE_ERROR),
+                              table->table_name);
+	error= 0;
+      }
       if (error == HA_ERR_ROW_IS_REFERENCED)
       {
 	/* the table is referenced by a foreign key constraint */
 	foreign_key_error=1;
       }
-      if (!error || error == ENOENT)
+      if (!error || error == ENOENT || error == HA_ERR_NO_SUCH_TABLE)
       {
+        int new_error;
 	/* Delete the table definition file */
 	strmov(end,reg_ext);
-	if (!(error=my_delete(path,MYF(MY_WME))))
+	if (!(new_error=my_delete(path,MYF(MY_WME))))
 	  some_tables_deleted=1;
-      }
-      if (error == HA_ERR_NO_SUCH_TABLE)
-      {
-        /* The table did not exist in engine */
-        if (if_exists)
-        {
-          push_warning_printf(thd, MYSQL_ERROR::WARN_LEVEL_NOTE,
-                              ER_BAD_TABLE_ERROR, ER(ER_BAD_TABLE_ERROR),
-                              table->table_name);
-          error= 0;
-        }
-        /* Delete the table definition file */
-        strmov(end,reg_ext);
-        if (!(my_delete(path,MYF(MY_WME))))
-          some_tables_deleted=1;
+        error|= new_error;
       }
     }
     if (error)