diff --git a/mysql-test/r/archive.result b/mysql-test/r/archive.result
index 6ba8191e2c3..59462e848d2 100644
--- a/mysql-test/r/archive.result
+++ b/mysql-test/r/archive.result
@@ -12666,3 +12666,12 @@ t6	CREATE TABLE `t6` (
   KEY `a` (`a`)
 ) ENGINE=ARCHIVE DEFAULT CHARSET=latin1
 DROP TABLE t1, t2, t4, t5, t6;
+create table t1 (i int) engine=archive;
+insert into t1 values (1);
+repair table t1 use_frm;
+Table	Op	Msg_type	Msg_text
+test.t1	repair	status	OK
+select * from t1;
+i
+1
+drop table t1;
diff --git a/mysql-test/r/federated_server.result b/mysql-test/r/federated_server.result
index a3e7cd793a6..0905aabb075 100644
--- a/mysql-test/r/federated_server.result
+++ b/mysql-test/r/federated_server.result
@@ -259,8 +259,10 @@ create procedure p1 ()
 begin
 DECLARE v INT DEFAULT 0;
 DECLARE e INT DEFAULT 0;
+DECLARE i INT;
 DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET e = e + 1;
-WHILE v < 10000 do
+SET i = sleep(5);
+WHILE v < 20000 do
 CREATE SERVER s
 FOREIGN DATA WRAPPER mysql
 OPTIONS (USER 'Remote', HOST '192.168.1.106', DATABASE 'test');
diff --git a/mysql-test/r/fulltext_left_join.result b/mysql-test/r/fulltext_left_join.result
index fdf11c14cc4..ea4cacf2fab 100644
--- a/mysql-test/r/fulltext_left_join.result
+++ b/mysql-test/r/fulltext_left_join.result
@@ -90,3 +90,10 @@ id	link	name	relevance
 1	1	string	0
 2	0	string	0
 DROP TABLE t1,t2;
+CREATE TABLE t1 (a INT);
+CREATE TABLE t2 (b INT, c TEXT, KEY(b));
+INSERT INTO t1 VALUES(1);
+INSERT INTO t2(b,c) VALUES(2,'castle'),(3,'castle');
+SELECT * FROM t1 LEFT JOIN t2 ON a=b WHERE MATCH(c) AGAINST('+castle' IN BOOLEAN MODE);
+a	b	c
+DROP TABLE t1, t2;
diff --git a/mysql-test/t/archive.test b/mysql-test/t/archive.test
index b2e720cb900..b5ace75dbc4 100644
--- a/mysql-test/t/archive.test
+++ b/mysql-test/t/archive.test
@@ -1540,3 +1540,13 @@ SHOW CREATE TABLE t6;
 --disable_warnings
 DROP TABLE t1, t2, t4, t5, t6;
 --enable_warnings
+
+#
+# BUG#26138 - REPAIR TABLE with option USE_FRM erases all records in ARCHIVE
+#             table
+#
+create table t1 (i int) engine=archive;
+insert into t1 values (1);
+repair table t1 use_frm;
+select * from t1;
+drop table t1;
diff --git a/mysql-test/t/federated_server.test b/mysql-test/t/federated_server.test
index b2075b8e262..20332f65bff 100644
--- a/mysql-test/t/federated_server.test
+++ b/mysql-test/t/federated_server.test
@@ -296,8 +296,10 @@ create procedure p1 ()
 begin
   DECLARE v INT DEFAULT 0;
   DECLARE e INT DEFAULT 0;
+  DECLARE i INT;
   DECLARE CONTINUE HANDLER FOR SQLEXCEPTION SET e = e + 1;
-  WHILE v < 10000 do
+  SET i = sleep(5);
+  WHILE v < 20000 do
     CREATE SERVER s
       FOREIGN DATA WRAPPER mysql
       OPTIONS (USER 'Remote', HOST '192.168.1.106', DATABASE 'test');
diff --git a/mysql-test/t/fulltext_left_join.test b/mysql-test/t/fulltext_left_join.test
index 5942ce119ee..8c13ae5cad9 100644
--- a/mysql-test/t/fulltext_left_join.test
+++ b/mysql-test/t/fulltext_left_join.test
@@ -87,3 +87,14 @@ SELECT t1.*, MATCH(t1.name) AGAINST('string') AS relevance
 DROP TABLE t1,t2;
 
 # End of 4.1 tests
+
+#
+# BUG#25729 - boolean full text search is confused by NULLs produced by LEFT
+#             JOIN
+#
+CREATE TABLE t1 (a INT);
+CREATE TABLE t2 (b INT, c TEXT, KEY(b));
+INSERT INTO t1 VALUES(1);
+INSERT INTO t2(b,c) VALUES(2,'castle'),(3,'castle');
+SELECT * FROM t1 LEFT JOIN t2 ON a=b WHERE MATCH(c) AGAINST('+castle' IN BOOLEAN MODE);
+DROP TABLE t1, t2;
diff --git a/sql/handler.h b/sql/handler.h
index 5c42dc670ee..cfa86358fa1 100644
--- a/sql/handler.h
+++ b/sql/handler.h
@@ -1472,6 +1472,17 @@ public:
   virtual void free_foreign_key_create_info(char* str) {}
   /* The following can be called without an open handler */
   virtual const char *table_type() const =0;
+  /*
+    If frm_error() is called then we will use this to find out what file
+    extentions exist for the storage engine. This is also used by the default
+    rename_table and delete_table method in handler.cc.
+
+    For engines that have two file name extentions (separate meta/index file
+    and data file), the order of elements is relevant. First element of engine
+    file name extentions array should be meta/index file extention. Second
+    element - data file extention. This order is assumed by
+    prepare_for_repair() when REPAIR TABLE ... USE_FRM is issued.
+  */
   virtual const char **bas_ext() const =0;
 
   virtual int get_default_no_partitions(HA_CREATE_INFO *info) { return 1;}
diff --git a/sql/item_func.cc b/sql/item_func.cc
index c24fb61cc43..5c4e83d0e17 100644
--- a/sql/item_func.cc
+++ b/sql/item_func.cc
@@ -4608,14 +4608,14 @@ void Item_func_match::init_search(bool no_order)
     fields.push_back(new Item_string(" ",1, cmp_collation.collation));
     for (uint i=1; i < arg_count; i++)
       fields.push_back(args[i]);
-    concat=new Item_func_concat_ws(fields);
+    concat_ws=new Item_func_concat_ws(fields);
     /*
       Above function used only to get value and do not need fix_fields for it:
       Item_string - basic constant
       fields - fix_fields() was already called for this arguments
       Item_func_concat_ws - do not need fix_fields() to produce value
     */
-    concat->quick_fix_field();
+    concat_ws->quick_fix_field();
   }
 
   if (master)
@@ -4830,8 +4830,8 @@ double Item_func_match::val_real()
 
   if (key == NO_SUCH_KEY)
   {
-    String *a= concat->val_str(&value);
-    if ((null_value= (a == 0)))
+    String *a= concat_ws->val_str(&value);
+    if ((null_value= (a == 0)) || !a->length())
       DBUG_RETURN(0);
     DBUG_RETURN(ft_handler->please->find_relevance(ft_handler,
 				      (byte *)a->ptr(), a->length()));
diff --git a/sql/item_func.h b/sql/item_func.h
index 90320c9bc56..610b47d4fca 100644
--- a/sql/item_func.h
+++ b/sql/item_func.h
@@ -1337,12 +1337,12 @@ public:
   FT_INFO *ft_handler;
   TABLE *table;
   Item_func_match *master;   // for master-slave optimization
-  Item *concat;              // Item_func_concat_ws
-  String value;              // value of concat
+  Item *concat_ws;           // Item_func_concat_ws
+  String value;              // value of concat_ws
   String search_value;       // key_item()'s value converted to cmp_collation
 
   Item_func_match(List<Item> &a, uint b): Item_real_func(a), key(0), flags(b),
-       join_key(0), ft_handler(0), table(0), master(0), concat(0) { }
+       join_key(0), ft_handler(0), table(0), master(0), concat_ws(0) { }
   void cleanup()
   {
     DBUG_ENTER("Item_func_match");
@@ -1350,7 +1350,7 @@ public:
     if (!master && ft_handler)
       ft_handler->please->close_search(ft_handler);
     ft_handler= 0;
-    concat= 0;
+    concat_ws= 0;
     DBUG_VOID_RETURN;
   }
   enum Functype functype() const { return FT_FUNC; }
diff --git a/sql/sql_table.cc b/sql/sql_table.cc
index 3eb47ebae6e..ff68c73cb98 100644
--- a/sql/sql_table.cc
+++ b/sql/sql_table.cc
@@ -3938,7 +3938,9 @@ static int prepare_for_repair(THD *thd, TABLE_LIST *table_list,
 
   /*
     Check if this is a table type that stores index and data separately,
-    like ISAM or MyISAM
+    like ISAM or MyISAM. We assume fixed order of engine file name
+    extentions array. First element of engine file name extentions array
+    is meta/index file extention. Second element - data file extention. 
   */
   ext= table->file->bas_ext();
   if (!ext[0] || !ext[1])
diff --git a/storage/example/ha_example.cc b/storage/example/ha_example.cc
index 999e36a4242..a4cdcafc6d0 100644
--- a/storage/example/ha_example.cc
+++ b/storage/example/ha_example.cc
@@ -247,6 +247,12 @@ ha_example::ha_example(handlerton *hton, TABLE_SHARE *table_arg)
   used by the default rename_table and delete_table method in
   handler.cc.
 
+  For engines that have two file name extentions (separate meta/index file
+  and data file), the order of elements is relevant. First element of engine
+  file name extentions array should be meta/index file extention. Second
+  element - data file extention. This order is assumed by
+  prepare_for_repair() when REPAIR TABLE ... USE_FRM is issued.
+
   @see
   rename_table method in handler.cc and
   delete_table method in handler.cc