Fix for -fbranch-probabilites (bug 268)

Fix for LEFT/RIGHT/MID with multi-byte-character sets (bug 314)
Fix for new bison 1.875
max_insert_delayed_threads and delayed_insert_timeout now works as documented (bug 211)
Don't show port in SHOW PROCESSLIST for system threads
Fix problem with ORDER BY being discarded for some DISTINCT queries (bug 275)
Fixed bug with NATURAL LEFT JOIN, NATURAL RIGHT JOIN and RIGHT JOIN when
using many joined tables (Bug 212)


acinclude.m4:
  Fix for -fbranch-probabilites
configure.in:
  Fix for -fbranch-probabilites
myisam/mi_open.c:
  Give error instead of writing to stderr (Which user can't see)
mysql-test/r/join.result:
  Update results after change to NATURAL/LEFT/RIGHT JOIN
mysql-test/r/join_outer.result:
  Update results after change to NATURAL/LEFT/RIGHT JOIN
mysql-test/r/select.result:
  Update results after change to NATURAL/LEFT/RIGHT JOIN
mysql-test/t/join.test:
  Update results after change to NATURAL/LEFT/RIGHT JOIN
sql/item_strfunc.cc:
  Fix for LEFT/RIGHT/MID with multi-byte-character sets
sql/mysqld.cc:
  Fix for new bison 1.875 (Wrong error text message when one got syntax error)
sql/sql_class.cc:
  Don't show port in SHOW PROCESSLIST for system threads
sql/sql_insert.cc:
  max_insert_delayed_threads now works as documented.
  delayed_insert_timeout now works on Linux
sql/sql_parse.cc:
  Added comment
sql/sql_select.cc:
  Fix problem with ORDER BY being discarded and results returned un-sorted
sql/sql_yacc.yy:
  Fixed bug with NATURAL LEFT JOIN, NATURAL RIGHT JOIN and RIGHT JOIN when
  using many joined tables.

17 files changed, 204 insertions, 44 deletions

diff --git a/acinclude.m4 b/acinclude.m4
index cf0233fa38f..4d7900acc3d 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -38,7 +38,7 @@ AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
 if test "$ac_cv_prog_gxx" = "yes"
 then
-  CXXFLAGS="$CXXFLAGS -Werror"
+  CXXFLAGS=`echo $CXXFLAGS -Werror | sed 's/-fbranch-probabilities//'`
 fi
 mysql_cv_btype_last_arg_accept=none
 [AC_TRY_COMPILE([#if defined(inline)
diff --git a/configure.in b/configure.in
index aea415a13c4..a1ea566435b 100644
--- a/configure.in
+++ b/configure.in
@@ -1862,7 +1862,7 @@ AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
 if test "$ac_cv_prog_gxx" = "yes" -a "$with_other_libc" = "no"
 then
-  CXXFLAGS="$CXXFLAGS -Werror"
+  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed 's/-fbranch-probabilities//'`
 fi
 AC_TRY_COMPILE(
 [#undef inline
@@ -1894,7 +1894,7 @@ AC_LANG_SAVE
 AC_LANG_CPLUSPLUS
 if test "$ac_cv_prog_gxx" = "yes" -a "$with_other_libc" = "no"
 then
-  CXXFLAGS="$CXXFLAGS -Werror"
+  CXXFLAGS=`echo "$CXXFLAGS -Werror" | sed 's/-fbranch-probabilities//'`
 fi
 AC_TRY_COMPILE(
 [#undef inline
@@ -2341,7 +2341,7 @@ extern int     mbcharlen_${c}(uint);"
     mbcharlen_${c}"
   else
     CHARSET_COMP_CS_INIT="$CHARSET_COMP_CS_INIT
-    0,          /* mbmaxlen  */
+    1,          /* mbmaxlen  */
     NULL,       /* ismbchar  */
     NULL,       /* ismbhead  */
     NULL        /* mbcharlen */"
diff --git a/myisam/mi_open.c b/myisam/mi_open.c
index 2f3ef872492..0ccc8a3bf40 100644
--- a/myisam/mi_open.c
+++ b/myisam/mi_open.c
@@ -183,8 +183,11 @@ MI_INFO *mi_open(const char *name, int mode, uint open_flags)
     share->state_diff_length=len-MI_STATE_INFO_SIZE;
 
     if (share->state.header.fulltext_keys)
-      fprintf(stderr, "Table file %s was created in MySQL 4.1+, use REPAIR TABLE ... USE_FRM to recreate it as a valid MySQL 4.0 table\n", name_buff);
-
+    {
+      /* Not supported in this version */
+      my_errno= HA_ERR_UNSUPPORTED;
+      goto err;
+    }
     mi_state_info_read(disk_cache, &share->state);
     len= mi_uint2korr(share->state.header.base_info_length);
     if (len != MI_BASE_INFO_SIZE)
diff --git a/mysql-test/r/ctype_ujis.result b/mysql-test/r/ctype_ujis.result
new file mode 100644
index 00000000000..223a18f19e9
--- /dev/null
+++ b/mysql-test/r/ctype_ujis.result
@@ -0,0 +1,8 @@
+drop table if exists t1;
+create table t1 (c text);
+insert into t1 values (0xa4a2),(0xa4a3);
+select hex(left(c,1)) from t1 group by c;
+hex(left(c,1))
+A4A2
+A4A3
+drop table t1;
diff --git a/mysql-test/r/join.result b/mysql-test/r/join.result
index 9f6a8762325..3211dcf76a9 100644
--- a/mysql-test/r/join.result
+++ b/mysql-test/r/join.result
@@ -274,3 +274,90 @@ SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (site
 rate_code	base_rate
 cust	20
 drop table t1,t2;
+create table t1 (i int);
+create table t2 (i int);
+create table t3 (i int);
+insert into t1 values(1),(2);
+insert into t2 values(2),(3);
+insert into t3 values (2),(4);
+select * from t1 natural left join t2;
+i	i
+1	NULL
+2	2
+select * from t1 left join t2 on (t1.i=t2.i);
+i	i
+1	NULL
+2	2
+select * from t1 natural left join t2 natural left join t3;
+i	i	i
+1	NULL	NULL
+2	2	2
+select * from t1 left join t2 on (t1.i=t2.i) left join t3 on (t2.i=t3.i);
+i	i	i
+1	NULL	NULL
+2	2	2
+select * from t3 natural right join t2;
+i	i
+2	2
+NULL	3
+select * from t3 right join t2 on (t3.i=t2.i);
+i	i
+2	2
+NULL	3
+select * from t3 natural right join t2 natural right join t1;
+i	i	i
+NULL	NULL	1
+2	2	2
+select * from t3 right join t2 on (t3.i=t2.i) right join t1 on (t2.i=t1.i);
+i	i	i
+NULL	NULL	1
+2	2	2
+select * from t1,t2 natural left join t3 order by t1.i,t2.i,t3.i;
+i	i	i
+1	2	2
+1	3	NULL
+2	2	2
+2	3	NULL
+select * from t1,t2 left join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i;
+i	i	i
+1	2	2
+1	3	NULL
+2	2	2
+2	3	NULL
+select t1.i,t2.i,t3.i from t2 natural left join t3,t1 order by t1.i,t2.i,t3.i;
+i	i	i
+1	2	2
+1	3	NULL
+2	2	2
+2	3	NULL
+select t1.i,t2.i,t3.i from t2 left join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i;
+i	i	i
+1	2	2
+1	3	NULL
+2	2	2
+2	3	NULL
+select * from t1,t2 natural right join t3 order by t1.i,t2.i,t3.i;
+i	i	i
+1	NULL	4
+1	2	2
+2	NULL	4
+2	2	2
+select * from t1,t2 right join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i;
+i	i	i
+1	NULL	4
+1	2	2
+2	NULL	4
+2	2	2
+select t1.i,t2.i,t3.i from t2 natural right join t3,t1 order by t1.i,t2.i,t3.i;
+i	i	i
+1	NULL	4
+1	2	2
+2	NULL	4
+2	2	2
+select t1.i,t2.i,t3.i from t2 right join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i;
+i	i	i
+1	NULL	4
+1	2	2
+2	NULL	4
+2	2	2
+drop table t1,t2,t3;
diff --git a/mysql-test/r/join_outer.result b/mysql-test/r/join_outer.result
index 98f8882aa10..e64cc07e344 100644
--- a/mysql-test/r/join_outer.result
+++ b/mysql-test/r/join_outer.result
@@ -351,12 +351,7 @@ select t1.name, t2.name, t2.id,t3.id from t1 right join t2 on (t1.id = t2.owner)
 name	name	id	id
 Antonio Paz	El Gato	1	1
 Antonio Paz	Perrito	2	1
-NULL	Happy	3	1
-NULL	El Gato	1	2
-NULL	Perrito	2	2
-NULL	Happy	3	2
-NULL	El Gato	1	3
-NULL	Perrito	2	3
+NULL	NULL	NULL	2
 Thimble Smith	Happy	3	3
 select t1.name, t2.name, t2.id, t2.owner, t3.id from t1 left join t2 on (t1.id = t2.owner) right join t1 as t3 on t3.id=t2.owner;
 name	name	id	owner	id
diff --git a/mysql-test/r/select.result b/mysql-test/r/select.result
index 1ad3043b4b2..a4c2533ec1a 100644
--- a/mysql-test/r/select.result
+++ b/mysql-test/r/select.result
@@ -3402,13 +3402,7 @@ a	a	a
 select * from t1 natural left join (t1 as t2 left join t1 as t3 using (a));
 a	a	a
 1	1	1
-2	1	NULL
-3	1	NULL
-1	2	NULL
 2	2	2
-3	2	NULL
-1	3	NULL
-2	3	NULL
 3	3	3
 select * from (t1 as t2 left join t1 as t3 using (a)) right join t1 on t1.a>1;
 a	a	a
@@ -3464,13 +3458,7 @@ a	a	a
 select * from t1 natural join (t1 as t2 left join t1 as t3 using (a));
 a	a	a
 1	1	1
-2	1	NULL
-3	1	NULL
-1	2	NULL
 2	2	2
-3	2	NULL
-1	3	NULL
-2	3	NULL
 3	3	3
 select * from (t1 as t2 left join t1 as t3 using (a)) natural join t1;
 a	a	a
diff --git a/mysql-test/t/ctype_ujis-master.opt b/mysql-test/t/ctype_ujis-master.opt
new file mode 100644
index 00000000000..1f4183d5027
--- /dev/null
+++ b/mysql-test/t/ctype_ujis-master.opt
@@ -0,0 +1 @@
+--default-character-set=ujis
diff --git a/mysql-test/t/ctype_ujis.test b/mysql-test/t/ctype_ujis.test
new file mode 100644
index 00000000000..cd1dc965000
--- /dev/null
+++ b/mysql-test/t/ctype_ujis.test
@@ -0,0 +1,13 @@
+#
+# Tests with the ujis character set
+#
+drop table if exists t1;
+
+#
+# Test problem with LEFT()
+#
+
+create table t1 (c text);
+insert into t1 values (0xa4a2),(0xa4a3);
+select hex(left(c,1)) from t1 group by c;
+drop table t1;
diff --git a/mysql-test/t/join.test b/mysql-test/t/join.test
index 63ec90f854c..7a9868e60ef 100644
--- a/mysql-test/t/join.test
+++ b/mysql-test/t/join.test
@@ -271,3 +271,35 @@ INSERT INTO t2 VALUES ('rivercats','cust',20);
 SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE emp.emp_id = 'psmith' AND lr.siteid = 'rivercats';
 SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE lr.siteid = 'rivercats' AND emp.emp_id = 'psmith';
 drop table t1,t2;
+
+#
+# Test combination of join methods
+#
+
+create table t1 (i int);
+create table t2 (i int);
+create table t3 (i int);
+insert into t1 values(1),(2);
+insert into t2 values(2),(3);
+insert into t3 values (2),(4);
+
+select * from t1 natural left join t2;
+select * from t1 left join t2 on (t1.i=t2.i);
+select * from t1 natural left join t2 natural left join t3;
+select * from t1 left join t2 on (t1.i=t2.i) left join t3 on (t2.i=t3.i);
+
+select * from t3 natural right join t2;
+select * from t3 right join t2 on (t3.i=t2.i);
+select * from t3 natural right join t2 natural right join t1;
+select * from t3 right join t2 on (t3.i=t2.i) right join t1 on (t2.i=t1.i);
+
+select * from t1,t2 natural left join t3 order by t1.i,t2.i,t3.i;
+select * from t1,t2 left join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i;
+select t1.i,t2.i,t3.i from t2 natural left join t3,t1 order by t1.i,t2.i,t3.i;
+select t1.i,t2.i,t3.i from t2 left join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i;
+
+select * from t1,t2 natural right join t3 order by t1.i,t2.i,t3.i;
+select * from t1,t2 right join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i;
+select t1.i,t2.i,t3.i from t2 natural right join t3,t1 order by t1.i,t2.i,t3.i;
+select t1.i,t2.i,t3.i from t2 right join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i;
+drop table t1,t2,t3;
diff --git a/sql/item_strfunc.cc b/sql/item_strfunc.cc
index 0f1ce8adba6..af4e2a01eae 100644
--- a/sql/item_strfunc.cc
+++ b/sql/item_strfunc.cc
@@ -899,7 +899,7 @@ void Item_str_func::left_right_max_length()
   max_length=args[0]->max_length;
   if (args[1]->const_item())
   {
-    int length=(int) args[1]->val_int();
+    int length=(int) args[1]->val_int()*default_charset_info->mbmaxlen;
     if (length <= 0)
       max_length=0;
     else
@@ -992,7 +992,7 @@ void Item_func_substr::fix_length_and_dec()
   }
   if (arg_count == 3 && args[2]->const_item())
   {
-    int32 length= (int32) args[2]->val_int();
+    int32 length= (int32) args[2]->val_int() * default_charset_info->mbmaxlen;
     if (length <= 0)
       max_length=0; /* purecov: inspected */
     else
diff --git a/sql/mysqld.cc b/sql/mysqld.cc
index 3910bfc880b..211237b8443 100644
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
@@ -1233,7 +1233,7 @@ void yyerror(const char *s)
 {
   NET *net=my_pthread_getspecific_ptr(NET*,THR_NET);
   char *yytext=(char*) current_lex->tok_start;
-  if (!strcmp(s,"parse error"))
+  if (!strcmp(s,"parse error") || !strcmp(s,"syntax error"))
     s=ER(ER_SYNTAX_ERROR);
   net_printf(net,ER_PARSE_ERROR, s, yytext ? (char*) yytext : "",
 	     current_lex->yylineno);
@@ -3787,7 +3787,7 @@ replicating a LOAD DATA INFILE command",
    (gptr*) &max_connect_errors, (gptr*) &max_connect_errors, 0, GET_ULONG,
     REQUIRED_ARG, MAX_CONNECT_ERRORS, 1, ~0L, 0, 1, 0},
   {"max_delayed_threads", OPT_MAX_DELAYED_THREADS,
-   "Don't start more than this number of threads to handle INSERT DELAYED statements. This option does not yet have effect (on TODO), unless it is set to zero, which means INSERT DELAYED is not used.",
+   "Don't start more than this number of threads to handle INSERT DELAYED statements. If set to zero, which means INSERT DELAYED is not used.",
    (gptr*) &max_insert_delayed_threads, (gptr*) &max_insert_delayed_threads,
    0, GET_ULONG, REQUIRED_ARG, 20, 0, 16384, 0, 1, 0},
   {"max_heap_table_size", OPT_MAX_HEP_TABLE_SIZE,
diff --git a/sql/sql_class.cc b/sql/sql_class.cc
index dc687e483e8..2a65291c273 100644
--- a/sql/sql_class.cc
+++ b/sql/sql_class.cc
@@ -110,6 +110,7 @@ THD::THD():user_time(0),fatal_error(0),last_insert_id_used(0),
   net.last_error[0]=0;				// If error on boot
   ull=0;
   system_thread=cleanup_done=0;
+  peer_port= 0;					// For SHOW PROCESSLIST
   transaction.changed_tables = 0;
 #ifdef	__WIN__
   real_id = 0;
diff --git a/sql/sql_insert.cc b/sql/sql_insert.cc
index 0e7a487276d..0379c1de287 100644
--- a/sql/sql_insert.cc
+++ b/sql/sql_insert.cc
@@ -643,6 +643,9 @@ static TABLE *delayed_get_table(THD *thd,TABLE_LIST *table_list)
   /* no match; create a new thread to handle the table */
   if (!(tmp=find_handler(thd,table_list)))
   {
+    /* Don't create more than max_insert_delayed_threads */
+    if (delayed_insert_threads >= max_insert_delayed_threads)
+      DBUG_RETURN(0);
     thd->proc_info="Creating delayed handler";
     pthread_mutex_lock(&LOCK_delayed_create);
     if (!(tmp=find_handler(thd,table_list)))	// Was just created
@@ -1021,7 +1024,7 @@ extern "C" pthread_handler_decl(handle_delayed_insert,arg)
       while (!thd->killed)
       {
 	int error;
-#if (defined(HAVE_BROKEN_COND_TIMEDWAIT) || defined(HAVE_LINUXTHREADS))
+#if defined(HAVE_BROKEN_COND_TIMEDWAIT)
 	error=pthread_cond_wait(&di->cond,&di->mutex);
 #else
 	error=pthread_cond_timedwait(&di->cond,&di->mutex,&abstime);
diff --git a/sql/sql_parse.cc b/sql/sql_parse.cc
index 0ffdb68a179..1a8ea7da8f4 100644
--- a/sql/sql_parse.cc
+++ b/sql/sql_parse.cc
@@ -210,9 +210,9 @@ static bool check_user(THD *thd,enum_server_command command, const char *user,
 				 !(thd->client_capabilities &
 				   CLIENT_LONG_PASSWORD),&ur);
   DBUG_PRINT("info",
-	     ("Capabilities: %d  packet_length: %ld  Host: '%s'  User: '%s'  Using password: %s  Access: %u  db: '%s'",
+	     ("Capabilities: %d  packet_length: %ld  Host: '%s'  Login user: '%s'  Priv_user: '%s'  Using password: %s  Access: %u  db: '%s'",
 	      thd->client_capabilities, thd->max_client_packet_length,
-	      thd->host_or_ip, thd->priv_user,
+	      thd->host_or_ip, thd->user, thd->priv_user,
 	      passwd[0] ? "yes": "no",
 	      thd->master_access, thd->db ? thd->db : "*none*"));
   if (thd->master_access & NO_ACCESS)
@@ -517,7 +517,6 @@ check_connections(THD *thd)
     DBUG_PRINT("info",("Host: %s",thd->host));
     thd->host_or_ip= thd->host;
     thd->ip= 0;
-    thd->peer_port= 0;
     bzero((char*) &thd->remote,sizeof(struct sockaddr));
   }
   /* Ensure that wrong hostnames doesn't cause buffer overflows */
@@ -3419,6 +3418,24 @@ void add_join_on(TABLE_LIST *b,Item *expr)
 }
 
 
+/*
+  Mark that we have a NATURAL JOIN between two tables
+
+  SYNOPSIS
+    add_join_natural()
+    a			Table to do normal join with
+    b			Do normal join with this table
+  
+  IMPLEMENTATION
+    This function just marks that table b should be joined with a.
+    The function setup_cond() will create in b->on_expr a list
+    of equal condition between all fields of the same name.
+
+    SELECT * FROM t1 NATURAL LEFT JOIN t2
+     <=>
+    SELECT * FROM t1 LEFT JOIN t2 ON (t1.i=t2.i and t1.j=t2.j ... )
+*/
+
 void add_join_natural(TABLE_LIST *a,TABLE_LIST *b)
 {
   b->natural_join=a;
diff --git a/sql/sql_select.cc b/sql/sql_select.cc
index 14b567b86c5..f870f8f5178 100644
--- a/sql/sql_select.cc
+++ b/sql/sql_select.cc
@@ -556,7 +556,17 @@ mysql_select(THD *thd,TABLE_LIST *tables,List<Item> &fields,COND *conds,
 	select_distinct= 0;
 	no_order= !order;
 	if (all_order_fields_used)
+	{
+	  if (order && skip_sort_order)
+	  {
+	    /*
+	      Force MySQL to read the table in sorted order to get result in
+	      ORDER BY order.
+	    */	    
+	    join.tmp_table_param.quick_group=0;
+	  }
 	  order=0;
+	}
 	join.group=1;				// For end_write_group
       }
       else
diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy
index 7cd0b9406ea..d7a0c15e9b9 100644
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -492,12 +492,6 @@ bool my_yyoverflow(short **a, YYSTYPE **b,int *yystacksize);
 %right	NOT
 %right	BINARY
 
-/* These don't actually affect the way the query is really evaluated, but
-   they silence a few warnings for shift/reduce conflicts. */
-%left	','
-%left	STRAIGHT_JOIN JOIN_SYM
-%nonassoc	CROSS INNER_SYM NATURAL LEFT RIGHT
-
 %type <lex_str>
 	IDENT TEXT_STRING REAL_NUM FLOAT_NUM NUM LONG_NUM HEX_NUM LEX_HOSTNAME
 	ULONGLONG_NUM field_ident select_alias ident ident_or_text
@@ -2116,7 +2110,7 @@ join_table_list:
 	| join_table_list ',' join_table_list { $$=$3; }
 	| join_table_list normal_join join_table_list { $$=$3; }
 	| join_table_list STRAIGHT_JOIN join_table_list
-	  { $$=$3 ; $$->straight=1; }
+	  { $$=$3 ; $1->next->straight=1; }
 	| join_table_list normal_join join_table_list ON expr
 	  { add_join_on($3,$5); $$=$3; }
 	| join_table_list normal_join join_table_list
@@ -2140,9 +2134,13 @@ join_table_list:
 	  USING '(' using_list ')'
 	  { add_join_on($5,$9); $5->outer_join|=JOIN_TYPE_LEFT; $$=$5; }
 	| join_table_list NATURAL LEFT opt_outer JOIN_SYM join_table_list
-	  { add_join_natural($1,$6); $6->outer_join|=JOIN_TYPE_LEFT; $$=$6; }
+	  {
+	    add_join_natural($1,$1->next);
+	    $1->next->outer_join|=JOIN_TYPE_LEFT;
+	    $$=$6;
+	  }
 	| join_table_list RIGHT opt_outer JOIN_SYM join_table_list ON expr
-	  { add_join_on($1,$7); $1->outer_join|=JOIN_TYPE_RIGHT; $$=$1; }
+	  { add_join_on($1,$7); $1->outer_join|=JOIN_TYPE_RIGHT; $$=$5; }
 	| join_table_list RIGHT opt_outer JOIN_SYM join_table_list
 	  {
 	    SELECT_LEX *sel=Select;
@@ -2150,11 +2148,15 @@ join_table_list:
 	    sel->db2=$5->db; sel->table2=$5->alias;
 	  }
 	  USING '(' using_list ')'
-	  { add_join_on($1,$9); $1->outer_join|=JOIN_TYPE_RIGHT; $$=$1; }
+	  { add_join_on($1,$9); $1->outer_join|=JOIN_TYPE_RIGHT; $$=$5; }
 	| join_table_list NATURAL RIGHT opt_outer JOIN_SYM join_table_list
-	  { add_join_natural($6,$1); $1->outer_join|=JOIN_TYPE_RIGHT; $$=$1; }
+	  {
+	    add_join_natural($1->next,$1);
+	    $1->outer_join|=JOIN_TYPE_RIGHT;
+	    $$=$6;
+	  }
 	| join_table_list NATURAL JOIN_SYM join_table_list
-	  { add_join_natural($1,$4); $$=$4; };
+	  { add_join_natural($1,$1->next); $$=$4; };
 
 normal_join:
 	JOIN_SYM		{}