diff --git a/mysql-test/lib/mtr_cases.pm b/mysql-test/lib/mtr_cases.pm
index 41d943e3522..c72717578cb 100644
--- a/mysql-test/lib/mtr_cases.pm
+++ b/mysql-test/lib/mtr_cases.pm
@@ -892,6 +892,12 @@ sub collect_one_test_case {
   }
   my @no_combs = grep { $test_combs{$_} == 1 } keys %test_combs;
   if (@no_combs) {
+    if ($::opt_skip_not_found) {
+      push @{$tinfo->{combinations}}, @no_combs;
+      $tinfo->{'skip'}= 1;
+      $tinfo->{'comment'}= "combination not found";
+      return $tinfo;
+    }
     mtr_error("Could not run $name with '".(
         join(',', sort @no_combs))."' combination(s)");
   }
diff --git a/mysql-test/main/cast.test b/mysql-test/main/cast.test
index ce4b1f6a574..5a0f87beb69 100644
--- a/mysql-test/main/cast.test
+++ b/mysql-test/main/cast.test
@@ -768,14 +768,11 @@ INSERT INTO t1 VALUES (-1.0);
 SELECT * FROM t1;
 DROP TABLE t1;
 
-#enable after MDEV-32645 is fixed
---disable_view_protocol
 SELECT CAST(-1e0 AS UNSIGNED);
 CREATE TABLE t1 (a BIGINT UNSIGNED);
 INSERT INTO t1 VALUES (-1e0);
 SELECT * FROM t1;
 DROP TABLE t1;
---enable_view_protocol
 
 SELECT CAST(-1e308 AS UNSIGNED);
 CREATE TABLE t1 (a BIGINT UNSIGNED);
diff --git a/mysql-test/main/cte_nonrecursive.result b/mysql-test/main/cte_nonrecursive.result
index 7bca6a44823..552be4ad03c 100644
--- a/mysql-test/main/cte_nonrecursive.result
+++ b/mysql-test/main/cte_nonrecursive.result
@@ -2624,4 +2624,49 @@ a
 1
 1
 DROP TABLE t1;
+#
+# MDEV-31657: CTE with the same name as base table used twice
+#             in another CTE
+#
+create table t (a int);
+insert into t values (3), (7), (1);
+with
+t as (select * from t),
+cte as (select t1.a as t1a, t2.a as t2a from t as t1, t as t2 where t1.a=t2.a)
+select * from cte;
+t1a	t2a
+3	3
+7	7
+1	1
+create table s (a int);
+insert into s values (1), (4), (7);
+with
+t as (select * from t),
+s as (select a-1 as a from s),
+cte as (select t.a as ta, s.a as sa from t, s where t.a=s.a
+union
+select t.a+1, s.a+1 from t, s where t.a=s.a+1)
+select * from cte;
+ta	sa
+3	3
+2	1
+8	7
+with
+t as (select * from t),
+cte as (select t.a as ta, s.a as sa from t, s where t.a=s.a
+union
+select t.a+1, s.a+1 from t, s where t.a=s.a),
+s as (select a+10 as a from s)
+select * from cte;
+ta	sa
+1	1
+7	7
+2	2
+8	8
+drop table t,s;
+with
+t as (select * from t),
+cte as (select t1.a as t1a, t2.a as t2a from t as t1, t as t2 where t1.a=t2.a)
+select * from cte;
+ERROR 42S02: Table 'test.t' doesn't exist
 # End of 10.4 tests
diff --git a/mysql-test/main/cte_nonrecursive.test b/mysql-test/main/cte_nonrecursive.test
index aa573a76454..bebf02eafd9 100644
--- a/mysql-test/main/cte_nonrecursive.test
+++ b/mysql-test/main/cte_nonrecursive.test
@@ -1979,4 +1979,50 @@ SELECT * FROM t1;
 
 DROP TABLE t1;
 
+--echo #
+--echo # MDEV-31657: CTE with the same name as base table used twice
+--echo #             in another CTE
+--echo #
+
+create table t (a int);
+insert into t values (3), (7), (1);
+
+let $q1=
+with
+t as (select * from t),
+cte as (select t1.a as t1a, t2.a as t2a from t as t1, t as t2 where t1.a=t2.a)
+select * from cte;
+
+eval $q1;
+
+create table s (a int);
+insert into s values (1), (4), (7);
+
+let $q2=
+with
+t as (select * from t),
+s as (select a-1 as a from s),
+cte as (select t.a as ta, s.a as sa from t, s where t.a=s.a
+        union
+        select t.a+1, s.a+1 from t, s where t.a=s.a+1)
+select * from cte;
+
+eval $q2;
+
+let $q3=
+with
+t as (select * from t),
+cte as (select t.a as ta, s.a as sa from t, s where t.a=s.a
+        union
+        select t.a+1, s.a+1 from t, s where t.a=s.a),
+s as (select a+10 as a from s)
+select * from cte;
+
+eval $q3;
+
+drop table t,s;
+
+--ERROR ER_NO_SUCH_TABLE
+eval $q1;
+
 --echo # End of 10.4 tests
diff --git a/mysql-test/main/type_float.result b/mysql-test/main/type_float.result
index 500f906642d..fa850cf9b34 100644
--- a/mysql-test/main/type_float.result
+++ b/mysql-test/main/type_float.result
@@ -1167,5 +1167,42 @@ d	50
 fdbl	123.456.789,12345678000000000000000000000000000000
 fdec	123.456.789,12345678900000000000000000000000000000
 #
+# MDEV-32645 CAST(AS UNSIGNED) fails with --view-protocol
+#
+SELECT
+CAST(-1e0 AS UNSIGNED),
+CAST(--2e0 AS UNSIGNED),
+CAST(---3e0 AS UNSIGNED),
+CAST(----4e0 AS UNSIGNED);
+CAST(-1e0 AS UNSIGNED)	CAST(--2e0 AS UNSIGNED)	CAST(---3e0 AS UNSIGNED)	CAST(----4e0 AS UNSIGNED)
+0	2	0	4
+Warnings:
+Note	1916	Got overflow when converting '-1' to UNSIGNED BIGINT. Value truncated
+Note	1916	Got overflow when converting '-3' to UNSIGNED BIGINT. Value truncated
+EXPLAIN EXTENDED SELECT
+CAST(-1e0 AS UNSIGNED),
+CAST(--2e0 AS UNSIGNED),
+CAST(---3e0 AS UNSIGNED),
+CAST(----4e0 AS UNSIGNED);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
+1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No tables used
+Warnings:
+Note	1003	select cast(-1e0 as unsigned) AS `CAST(-1e0 AS UNSIGNED)`,cast(2e0 as unsigned) AS `CAST(--2e0 AS UNSIGNED)`,cast(-3e0 as unsigned) AS `CAST(---3e0 AS UNSIGNED)`,cast(4e0 as unsigned) AS `CAST(----4e0 AS UNSIGNED)`
+CREATE VIEW v1 AS SELECT
+CAST(-1e0 AS UNSIGNED),
+CAST(--2e0 AS UNSIGNED),
+CAST(---3e0 AS UNSIGNED),
+CAST(----4e0 AS UNSIGNED);
+SHOW CREATE VIEW v1;
+View	Create View	character_set_client	collation_connection
+v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select cast(-1e0 as unsigned) AS `CAST(-1e0 AS UNSIGNED)`,cast(2e0 as unsigned) AS `CAST(--2e0 AS UNSIGNED)`,cast(-3e0 as unsigned) AS `CAST(---3e0 AS UNSIGNED)`,cast(4e0 as unsigned) AS `CAST(----4e0 AS UNSIGNED)`	latin1	latin1_swedish_ci
+SELECT * FROM v1;
+CAST(-1e0 AS UNSIGNED)	CAST(--2e0 AS UNSIGNED)	CAST(---3e0 AS UNSIGNED)	CAST(----4e0 AS UNSIGNED)
+0	2	0	4
+Warnings:
+Note	1916	Got overflow when converting '-1' to UNSIGNED BIGINT. Value truncated
+Note	1916	Got overflow when converting '-3' to UNSIGNED BIGINT. Value truncated
+DROP VIEW v1;
+#
 # End of 10.4 tests
 #
diff --git a/mysql-test/main/type_float.test b/mysql-test/main/type_float.test
index 7516508ac3c..12ae5937533 100644
--- a/mysql-test/main/type_float.test
+++ b/mysql-test/main/type_float.test
@@ -716,6 +716,32 @@ $$
 DELIMITER ;$$
 --horizontal_results
 
+--echo #
+--echo # MDEV-32645 CAST(AS UNSIGNED) fails with --view-protocol
+--echo #
+
+SELECT
+  CAST(-1e0 AS UNSIGNED),
+  CAST(--2e0 AS UNSIGNED),
+  CAST(---3e0 AS UNSIGNED),
+  CAST(----4e0 AS UNSIGNED);
+
+EXPLAIN EXTENDED SELECT
+  CAST(-1e0 AS UNSIGNED),
+  CAST(--2e0 AS UNSIGNED),
+  CAST(---3e0 AS UNSIGNED),
+  CAST(----4e0 AS UNSIGNED);
+
+CREATE VIEW v1 AS SELECT
+  CAST(-1e0 AS UNSIGNED),
+  CAST(--2e0 AS UNSIGNED),
+  CAST(---3e0 AS UNSIGNED),
+  CAST(----4e0 AS UNSIGNED);
+
+SHOW CREATE VIEW v1;
+SELECT * FROM v1;
+DROP VIEW v1;
+
 --echo #
 --echo # End of 10.4 tests
 --echo #
diff --git a/mysql-test/suite/sql_sequence/alter.result b/mysql-test/suite/sql_sequence/alter.result
index 68d42e52784..d4e930ebb92 100644
--- a/mysql-test/suite/sql_sequence/alter.result
+++ b/mysql-test/suite/sql_sequence/alter.result
@@ -252,3 +252,52 @@ SELECT NEXTVAL(s);
 NEXTVAL(s)
 1
 DROP SEQUENCE s;
+#
+# MDEV-33169 Alter sequence 2nd ps fails while alter sequence 2nd time (no ps) succeeds
+#
+create sequence s;
+show create sequence s;
+Table	Create Table
+s	CREATE SEQUENCE `s` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 cache 1000 nocycle ENGINE=MyISAM
+alter sequence s maxvalue 123;
+show create sequence s;
+Table	Create Table
+s	CREATE SEQUENCE `s` start with 1 minvalue 1 maxvalue 123 increment by 1 cache 1000 nocycle ENGINE=MyISAM
+alter sequence s maxvalue 123;
+show create sequence s;
+Table	Create Table
+s	CREATE SEQUENCE `s` start with 1 minvalue 1 maxvalue 123 increment by 1 cache 1000 nocycle ENGINE=MyISAM
+drop sequence s;
+create sequence s;
+show create sequence s;
+Table	Create Table
+s	CREATE SEQUENCE `s` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 cache 1000 nocycle ENGINE=MyISAM
+prepare stmt from 'alter sequence s maxvalue 123';
+execute stmt;
+show create sequence s;
+Table	Create Table
+s	CREATE SEQUENCE `s` start with 1 minvalue 1 maxvalue 123 increment by 1 cache 1000 nocycle ENGINE=MyISAM
+execute stmt;
+show create sequence s;
+Table	Create Table
+s	CREATE SEQUENCE `s` start with 1 minvalue 1 maxvalue 123 increment by 1 cache 1000 nocycle ENGINE=MyISAM
+deallocate prepare stmt;
+drop sequence s;
+create sequence s;
+show create sequence s;
+Table	Create Table
+s	CREATE SEQUENCE `s` start with 1 minvalue 1 maxvalue 9223372036854775806 increment by 1 cache 1000 nocycle ENGINE=MyISAM
+create procedure p() alter sequence s maxvalue 123;
+call p;
+show create sequence s;
+Table	Create Table
+s	CREATE SEQUENCE `s` start with 1 minvalue 1 maxvalue 123 increment by 1 cache 1000 nocycle ENGINE=MyISAM
+call p;
+show create sequence s;
+Table	Create Table
+s	CREATE SEQUENCE `s` start with 1 minvalue 1 maxvalue 123 increment by 1 cache 1000 nocycle ENGINE=MyISAM
+drop procedure p;
+drop sequence s;
+#
+# End of 10.4 tests
+#
diff --git a/mysql-test/suite/sql_sequence/alter.test b/mysql-test/suite/sql_sequence/alter.test
index a771c9bba2f..015aba22af6 100644
--- a/mysql-test/suite/sql_sequence/alter.test
+++ b/mysql-test/suite/sql_sequence/alter.test
@@ -167,3 +167,38 @@ ALTER TABLE s ORDER BY cache_size;
 SELECT NEXTVAL(s);
 DROP SEQUENCE s;
 --enable_ps2_protocol
+
+--echo #
+--echo # MDEV-33169 Alter sequence 2nd ps fails while alter sequence 2nd time (no ps) succeeds
+--echo #
+create sequence s;
+show create sequence s;
+alter sequence s maxvalue 123;
+show create sequence s;
+alter sequence s maxvalue 123;
+show create sequence s;
+drop sequence s;
+
+create sequence s;
+show create sequence s;
+prepare stmt from 'alter sequence s maxvalue 123';
+execute stmt;
+show create sequence s;
+execute stmt;
+show create sequence s;
+deallocate prepare stmt;
+drop sequence s;
+
+create sequence s;
+show create sequence s;
+create procedure p() alter sequence s maxvalue 123;
+call p;
+show create sequence s;
+call p;
+show create sequence s;
+drop procedure p;
+drop sequence s;
+
+--echo #
+--echo # End of 10.4 tests
+--echo #
diff --git a/plugin/auth_pam/testing/pam_mariadb_mtr.c b/plugin/auth_pam/testing/pam_mariadb_mtr.c
index 108aeb941ac..de34f5d8866 100644
--- a/plugin/auth_pam/testing/pam_mariadb_mtr.c
+++ b/plugin/auth_pam/testing/pam_mariadb_mtr.c
@@ -10,8 +10,8 @@
 
 #include <stdlib.h>
 #include <string.h>
-#include <security/pam_modules.h>
 #include <security/pam_appl.h>
+#include <security/pam_modules.h>
 
 #define N 3
 
diff --git a/plugin/disks/information_schema_disks.cc b/plugin/disks/information_schema_disks.cc
index 18195b91044..c97d46be03f 100644
--- a/plugin/disks/information_schema_disks.cc
+++ b/plugin/disks/information_schema_disks.cc
@@ -19,10 +19,14 @@
 #include <sys/types.h>
 #if defined(HAVE_GETMNTENT)
 #include <mntent.h>
+#elif defined(HAVE_SYS_MNTENT)
+#include <sys/mntent.h>
 #elif !defined(HAVE_GETMNTINFO_TAKES_statvfs)
 /* getmntinfo (the not NetBSD variants) */
 #include <sys/param.h>
+#if defined(HAVE_SYS_UCRED)
 #include <sys/ucred.h>
+#endif
 #include <sys/mount.h>
 #endif
 #if defined(HAVE_GETMNTENT_IN_SYS_MNTAB)
diff --git a/sql/item.cc b/sql/item.cc
index 7b6708c2514..60a50d9feee 100644
--- a/sql/item.cc
+++ b/sql/item.cc
@@ -6969,7 +6969,25 @@ Item *Item_float::neg(THD *thd)
   else if (value < 0 && max_length)
     max_length--;
   value= -value;
-  presentation= 0;
+  if (presentation)
+  {
+    if (*presentation == '-')
+    {
+      // Strip double minus: -(-1) -> '1' instead of '--1'
+      presentation++;
+    }
+    else
+    {
+      size_t presentation_length= strlen(presentation);
+      if (char *tmp= (char*) thd->alloc(presentation_length + 2))
+      {
+        tmp[0]= '-';
+        // Copy with the trailing '\0'
+        memcpy(tmp + 1, presentation, presentation_length + 1);
+        presentation= tmp;
+      }
+    }
+  }
   name= null_clex_str;
   return this;
 }
diff --git a/sql/mysqld.cc b/sql/mysqld.cc
index 1f59149beb5..b698928c5f7 100644
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
@@ -6841,8 +6841,8 @@ struct my_option my_long_options[]=
 #endif
 };
 
-static int show_queries(THD *thd, SHOW_VAR *var, char *buff,
-                        enum enum_var_type scope)
+static int show_queries(THD *thd, SHOW_VAR *var, void *,
+                        system_status_var *, enum_var_type)
 {
   var->type= SHOW_LONGLONG;
   var->value= &thd->query_id;
@@ -6850,16 +6850,16 @@ static int show_queries(THD *thd, SHOW_VAR *var, char *buff,
 }
 
 
-static int show_net_compression(THD *thd, SHOW_VAR *var, char *buff,
-                                enum enum_var_type scope)
+static int show_net_compression(THD *thd, SHOW_VAR *var, void *,
+                                system_status_var *, enum_var_type)
 {
   var->type= SHOW_MY_BOOL;
   var->value= &thd->net.compress;
   return 0;
 }
 
-static int show_starttime(THD *thd, SHOW_VAR *var, char *buff,
-                          enum enum_var_type scope)
+static int show_starttime(THD *thd, SHOW_VAR *var, void *buff,
+                          system_status_var *, enum_var_type)
 {
   var->type= SHOW_LONG;
   var->value= buff;
@@ -6868,8 +6868,8 @@ static int show_starttime(THD *thd, SHOW_VAR *var, char *buff,
 }
 
 #ifdef ENABLED_PROFILING
-static int show_flushstatustime(THD *thd, SHOW_VAR *var, char *buff,
-                                enum enum_var_type scope)
+static int show_flushstatustime(THD *thd, SHOW_VAR *var, void *buff,
+                                system_status_var *, enum_var_type)
 {
   var->type= SHOW_LONG;
   var->value= buff;
@@ -6879,32 +6879,28 @@ static int show_flushstatustime(THD *thd, SHOW_VAR *var, char *buff,
 #endif
 
 #ifdef HAVE_REPLICATION
-static int show_rpl_status(THD *thd, SHOW_VAR *var, char *buff,
-                           enum enum_var_type scope)
+static int show_rpl_status(THD *, SHOW_VAR *var, void *, system_status_var *,
+                           enum_var_type)
 {
   var->type= SHOW_CHAR;
   var->value= const_cast<char*>(rpl_status_type[(int)rpl_status]);
   return 0;
 }
 
-static int show_slave_running(THD *thd, SHOW_VAR *var, char *buff,
-                              enum enum_var_type scope)
+static int show_slave_running(THD *thd, SHOW_VAR *var, void *buff,
+                              system_status_var *, enum_var_type)
 {
-  Master_info *mi= NULL;
-  bool UNINIT_VAR(tmp);
-
-  var->type= SHOW_MY_BOOL;
-  var->value= buff;
-
-  if ((mi= get_master_info(&thd->variables.default_master_connection,
-                           Sql_condition::WARN_LEVEL_NOTE)))
+  if (Master_info *mi=
+      get_master_info(&thd->variables.default_master_connection,
+                      Sql_condition::WARN_LEVEL_NOTE))
   {
-    tmp= (my_bool) (mi->slave_running == MYSQL_SLAVE_RUN_READING &&
-                    mi->rli.slave_running != MYSQL_SLAVE_NOT_RUN);
+    *((my_bool*) buff)=
+      (mi->slave_running == MYSQL_SLAVE_RUN_READING &&
+       mi->rli.slave_running != MYSQL_SLAVE_NOT_RUN);
     mi->release();
+    var->type= SHOW_MY_BOOL;
+    var->value= buff;
   }
-  if (mi)
-    *((my_bool *)buff)= tmp;
   else
     var->type= SHOW_UNDEF;
   return 0;
@@ -6914,7 +6910,8 @@ static int show_slave_running(THD *thd, SHOW_VAR *var, char *buff,
 /* How many masters this slave is connected to */
 
 
-static int show_slaves_running(THD *thd, SHOW_VAR *var, char *buff)
+static int show_slaves_running(THD *, SHOW_VAR *var, void *buff,
+                               system_status_var *, enum_var_type)
 {
   var->type= SHOW_LONGLONG;
   var->value= buff;
@@ -6925,19 +6922,17 @@ static int show_slaves_running(THD *thd, SHOW_VAR *var, char *buff)
 }
 
 
-static int show_slave_received_heartbeats(THD *thd, SHOW_VAR *var, char *buff,
-                                          enum enum_var_type scope)
+static int show_slave_received_heartbeats(THD *thd, SHOW_VAR *var, void *buff,
+                                          system_status_var *, enum_var_type)
 {
-  Master_info *mi;
-
-  var->type= SHOW_LONGLONG;
-  var->value= buff;
-
-  if ((mi= get_master_info(&thd->variables.default_master_connection,
-                           Sql_condition::WARN_LEVEL_NOTE)))
+  if (Master_info *mi=
+      get_master_info(&thd->variables.default_master_connection,
+                           Sql_condition::WARN_LEVEL_NOTE))
   {
     *((longlong *)buff)= mi->received_heartbeats;
     mi->release();
+    var->type= SHOW_LONGLONG;
+    var->value= buff;
   }
   else
     var->type= SHOW_UNDEF;
@@ -6945,19 +6940,17 @@ static int show_slave_received_heartbeats(THD *thd, SHOW_VAR *var, char *buff,
 }
 
 
-static int show_heartbeat_period(THD *thd, SHOW_VAR *var, char *buff,
-                                 enum enum_var_type scope)
+static int show_heartbeat_period(THD *thd, SHOW_VAR *var, void *buff,
+                                 system_status_var *, enum_var_type)
 {
-  Master_info *mi;
-
-  var->type= SHOW_CHAR;
-  var->value= buff;
-
-  if ((mi= get_master_info(&thd->variables.default_master_connection,
-                           Sql_condition::WARN_LEVEL_NOTE)))
+  if (Master_info *mi=
+      get_master_info(&thd->variables.default_master_connection,
+                      Sql_condition::WARN_LEVEL_NOTE))
   {
-    sprintf(buff, "%.3f", mi->heartbeat_period);
+    sprintf(static_cast<char*>(buff), "%.3f", mi->heartbeat_period);
     mi->release();
+    var->type= SHOW_CHAR;
+    var->value= buff;
   }
   else
     var->type= SHOW_UNDEF;
@@ -6967,8 +6960,8 @@ static int show_heartbeat_period(THD *thd, SHOW_VAR *var, char *buff,
 
 #endif /* HAVE_REPLICATION */
 
-static int show_open_tables(THD *thd, SHOW_VAR *var, char *buff,
-                            enum enum_var_type scope)
+static int show_open_tables(THD *, SHOW_VAR *var, void *buff,
+                            system_status_var *, enum_var_type)
 {
   var->type= SHOW_LONG;
   var->value= buff;
@@ -6976,8 +6969,8 @@ static int show_open_tables(THD *thd, SHOW_VAR *var, char *buff,
   return 0;
 }
 
-static int show_prepared_stmt_count(THD *thd, SHOW_VAR *var, char *buff,
-                                    enum enum_var_type scope)
+static int show_prepared_stmt_count(THD *, SHOW_VAR *var, void *buff,
+                                    system_status_var *, enum_var_type)
 {
   var->type= SHOW_LONG;
   var->value= buff;
@@ -6987,8 +6980,8 @@ static int show_prepared_stmt_count(THD *thd, SHOW_VAR *var, char *buff,
   return 0;
 }
 
-static int show_table_definitions(THD *thd, SHOW_VAR *var, char *buff,
-                                  enum enum_var_type scope)
+static int show_table_definitions(THD *, SHOW_VAR *var, void *buff,
+                                  system_status_var *, enum_var_type)
 {
   var->type= SHOW_LONG;
   var->value= buff;
@@ -7007,8 +7000,8 @@ static int show_table_definitions(THD *thd, SHOW_VAR *var, char *buff,
          inside an Event.
  */
 
-static int show_ssl_get_version(THD *thd, SHOW_VAR *var, char *buff,
-                                enum enum_var_type scope)
+static int show_ssl_get_version(THD *thd, SHOW_VAR *var, void *,
+                                system_status_var *, enum_var_type)
 {
   var->type= SHOW_CHAR;
   if( thd->vio_ok() && thd->net.vio->ssl_arg )
@@ -7018,8 +7011,8 @@ static int show_ssl_get_version(THD *thd, SHOW_VAR *var, char *buff,
   return 0;
 }
 
-static int show_ssl_get_default_timeout(THD *thd, SHOW_VAR *var, char *buff,
-                                        enum enum_var_type scope)
+static int show_ssl_get_default_timeout(THD *thd, SHOW_VAR *var, void *buff,
+                                        system_status_var *, enum_var_type)
 {
   var->type= SHOW_LONG;
   var->value= buff;
@@ -7030,8 +7023,8 @@ static int show_ssl_get_default_timeout(THD *thd, SHOW_VAR *var, char *buff,
   return 0;
 }
 
-static int show_ssl_get_verify_mode(THD *thd, SHOW_VAR *var, char *buff,
-                                    enum enum_var_type scope)
+static int show_ssl_get_verify_mode(THD *thd, SHOW_VAR *var, void *buff,
+                                    system_status_var *, enum_var_type)
 {
   var->type= SHOW_LONG;
   var->value= buff;
@@ -7046,8 +7039,8 @@ static int show_ssl_get_verify_mode(THD *thd, SHOW_VAR *var, char *buff,
   return 0;
 }
 
-static int show_ssl_get_verify_depth(THD *thd, SHOW_VAR *var, char *buff,
-                                     enum enum_var_type scope)
+static int show_ssl_get_verify_depth(THD *thd, SHOW_VAR *var, void *buff,
+                                     system_status_var *, enum_var_type)
 {
   var->type= SHOW_LONG;
   var->value= buff;
@@ -7059,8 +7052,8 @@ static int show_ssl_get_verify_depth(THD *thd, SHOW_VAR *var, char *buff,
   return 0;
 }
 
-static int show_ssl_get_cipher(THD *thd, SHOW_VAR *var, char *buff,
-                               enum enum_var_type scope)
+static int show_ssl_get_cipher(THD *thd, SHOW_VAR *var, void *buff,
+                               system_status_var *, enum_var_type)
 {
   var->type= SHOW_CHAR;
   if( thd->vio_ok() && thd->net.vio->ssl_arg )
@@ -7070,9 +7063,10 @@ static int show_ssl_get_cipher(THD *thd, SHOW_VAR *var, char *buff,
   return 0;
 }
 
-static int show_ssl_get_cipher_list(THD *thd, SHOW_VAR *var, char *buff,
-                                    enum enum_var_type scope)
+static int show_ssl_get_cipher_list(THD *thd, SHOW_VAR *var, void *buf,
+                                    system_status_var *, enum_var_type)
 {
+  char *buff= static_cast<char*>(buf);
   var->type= SHOW_CHAR;
   var->value= buff;
   if (thd->vio_ok() && thd->net.vio->ssl_arg)
@@ -7157,8 +7151,8 @@ end:
 */
 
 static int
-show_ssl_get_server_not_before(THD *thd, SHOW_VAR *var, char *buff,
-                               enum enum_var_type scope)
+show_ssl_get_server_not_before(THD *thd, SHOW_VAR *var, void *buff,
+                               system_status_var *, enum_var_type)
 {
   var->type= SHOW_CHAR;
   if(thd->vio_ok() && thd->net.vio->ssl_arg)
@@ -7167,7 +7161,7 @@ show_ssl_get_server_not_before(THD *thd, SHOW_VAR *var, char *buff,
     X509 *cert= SSL_get_certificate(ssl);
     const ASN1_TIME *not_before= X509_get0_notBefore(cert);
 
-    var->value= my_asn1_time_to_string(not_before, buff,
+    var->value= my_asn1_time_to_string(not_before, static_cast<char*>(buff),
                                        SHOW_VAR_FUNC_BUFF_SIZE);
     if (!var->value)
       return 1;
@@ -7191,8 +7185,8 @@ show_ssl_get_server_not_before(THD *thd, SHOW_VAR *var, char *buff,
 */
 
 static int
-show_ssl_get_server_not_after(THD *thd, SHOW_VAR *var, char *buff,
-                              enum enum_var_type scope)
+show_ssl_get_server_not_after(THD *thd, SHOW_VAR *var, void *buff,
+                              system_status_var *, enum_var_type)
 {
   var->type= SHOW_CHAR;
   if(thd->vio_ok() && thd->net.vio->ssl_arg)
@@ -7201,7 +7195,7 @@ show_ssl_get_server_not_after(THD *thd, SHOW_VAR *var, char *buff,
     X509 *cert= SSL_get_certificate(ssl);
     const ASN1_TIME *not_after= X509_get0_notAfter(cert);
 
-    var->value= my_asn1_time_to_string(not_after, buff,
+    var->value= my_asn1_time_to_string(not_after, static_cast<char*>(buff),
                                        SHOW_VAR_FUNC_BUFF_SIZE);
     if (!var->value)
       return 1;
@@ -7255,7 +7249,7 @@ static int show_default_keycache(THD *thd, SHOW_VAR *var, void *buff,
 }
 
 
-static int show_memory_used(THD *thd, SHOW_VAR *var, char *buff,
+static int show_memory_used(THD *thd, SHOW_VAR *var, void *buff,
                             struct system_status_var *status_var,
                             enum enum_var_type scope)
 {
@@ -7311,8 +7305,8 @@ static int debug_status_func(THD *thd, SHOW_VAR *var, void *buff,
 #endif
 
 #ifdef HAVE_POOL_OF_THREADS
-static int show_threadpool_idle_threads(THD *thd, SHOW_VAR *var, char *buff,
-                                 enum enum_var_type scope)
+static int show_threadpool_idle_threads(THD *, SHOW_VAR *var, void *buff,
+                                        system_status_var *, enum_var_type)
 {
   var->type= SHOW_INT;
   var->value= buff;
@@ -7321,8 +7315,8 @@ static int show_threadpool_idle_threads(THD *thd, SHOW_VAR *var, char *buff,
 }
 
 
-static int show_threadpool_threads(THD *thd, SHOW_VAR *var, char *buff,
-                                   enum enum_var_type scope)
+static int show_threadpool_threads(THD *, SHOW_VAR *var, void *buff,
+                                   system_status_var *, enum_var_type)
 {
   var->type= SHOW_INT;
   var->value= buff;
diff --git a/sql/sql_acl.cc b/sql/sql_acl.cc
index 20305665f75..39b1be87040 100644
--- a/sql/sql_acl.cc
+++ b/sql/sql_acl.cc
@@ -8291,11 +8291,6 @@ bool check_grant(THD *thd, privilege_t want_access, TABLE_LIST *tables,
                          INSERT_ACL : SELECT_ACL);
     }
 
-    if (tl->with || !tl->db.str ||
-        (tl->select_lex &&
-         (tl->with= tl->select_lex->find_table_def_in_with_clauses(tl))))
-      continue;
-
     const ACL_internal_table_access *access=
       get_cached_table_access(&t_ref->grant.m_internal,
                               t_ref->get_db_name(),
@@ -12038,8 +12033,8 @@ static my_bool count_column_grants(void *grant_table,
   This must be performed under the mutex in order to make sure the
   iteration does not fail.
 */
-static int show_column_grants(THD *thd, SHOW_VAR *var, char *buff,
-                              enum enum_var_type scope)
+static int show_column_grants(THD *thd, SHOW_VAR *var, void *buff,
+                              system_status_var *, enum enum_var_type scope)
 {
   var->type= SHOW_ULONG;
   var->value= buff;
@@ -12055,8 +12050,8 @@ static int show_column_grants(THD *thd, SHOW_VAR *var, char *buff,
   return 0;
 }
 
-static int show_database_grants(THD *thd, SHOW_VAR *var, char *buff,
-                                enum enum_var_type scope)
+static int show_database_grants(THD *thd, SHOW_VAR *var, void *buff,
+                                system_status_var *, enum enum_var_type scope)
 {
   var->type= SHOW_UINT;
   var->value= buff;
diff --git a/sql/sql_class.cc b/sql/sql_class.cc
index c29a661f4ca..52d65ee46f6 100644
--- a/sql/sql_class.cc
+++ b/sql/sql_class.cc
@@ -724,7 +724,6 @@ THD::THD(my_thread_id id, bool is_wsrep_applier)
    wsrep_wfc()
 #endif /*WITH_WSREP */
 {
-  ulong tmp;
   bzero(&variables, sizeof(variables));
 
   /*
@@ -877,14 +876,6 @@ THD::THD(my_thread_id id, bool is_wsrep_applier)
 
   tablespace_op=FALSE;
 
-  /*
-    Initialize the random generator. We call my_rnd() without a lock as
-    it's not really critical if two threads modifies the structure at the
-    same time.  We ensure that we have an unique number foreach thread
-    by adding the address of the stack.
-  */
-  tmp= (ulong) (my_rnd(&sql_rand) * 0xffffffff);
-  my_rnd_init(&rand, tmp + (ulong)((size_t) &rand), tmp + (ulong) ::global_query_id);
   substitute_null_with_insert_id = FALSE;
   lock_info.mysql_thd= (void *)this;
 
@@ -1323,6 +1314,17 @@ void THD::init()
   /* Set to handle counting of aborted connections */
   userstat_running= opt_userstat_running;
   last_global_update_time= current_connect_time= time(NULL);
+
+  /*
+    Initialize the random generator. We call my_rnd() without a lock as
+    it's not really critical if two threads modify the structure at the
+    same time.  We ensure that we have a unique number for each thread
+    by adding the address of this THD.
+  */
+  ulong tmp= (ulong) (my_rnd(&sql_rand) * 0xffffffff);
+  my_rnd_init(&rand, tmp + (ulong)(intptr) this,
+                     (ulong)(my_timer_cycles() + global_query_id));
+
 #ifndef EMBEDDED_LIBRARY
   session_tracker.enable(this);
 #endif //EMBEDDED_LIBRARY
diff --git a/sql/sql_cte.cc b/sql/sql_cte.cc
index 3310ba55229..5f6390da1e9 100644
--- a/sql/sql_cte.cc
+++ b/sql/sql_cte.cc
@@ -106,6 +106,7 @@ bool LEX::check_dependencies_in_with_clauses()
 
   @param tables      Points to the beginning of the sub-chain
   @param tables_last Points to the address with the sub-chain barrier
+  @param excl_spec   Ignore the definition with this spec
 
   @details
     The method resolves tables references to CTE from the chain of
@@ -147,7 +148,8 @@ bool LEX::check_dependencies_in_with_clauses()
 */
 
 bool LEX::resolve_references_to_cte(TABLE_LIST *tables,
-                                    TABLE_LIST **tables_last)
+                                    TABLE_LIST **tables_last,
+                                    st_select_lex_unit *excl_spec)
 {
   With_element *with_elem= 0;
 
@@ -156,7 +158,8 @@ bool LEX::resolve_references_to_cte(TABLE_LIST *tables,
     if (tbl->derived)
       continue;
     if (!tbl->db.str && !tbl->with)
-      tbl->with= tbl->select_lex->find_table_def_in_with_clauses(tbl);
+      tbl->with= tbl->select_lex->find_table_def_in_with_clauses(tbl,
+                                                                 excl_spec);
     if (!tbl->with)    // no CTE matches table reference tbl
     {
       if (only_cte_resolution)
@@ -244,7 +247,7 @@ LEX::check_cte_dependencies_and_resolve_references()
     return true;
   if (!with_cte_resolution)
     return false;
-  if (resolve_references_to_cte(query_tables, query_tables_last))
+  if (resolve_references_to_cte(query_tables, query_tables_last, NULL))
     return true;
   return false;
 }
@@ -388,6 +391,7 @@ bool With_element::check_dependencies_in_spec()
  
   @param table    The reference to the table that is looked for
   @param barrier  The barrier with element for the search
+  @param excl_spec Ignore the definition with this spec
 
   @details
     The function looks through the elements of this with clause trying to find
@@ -401,12 +405,15 @@ bool With_element::check_dependencies_in_spec()
 */    
 
 With_element *With_clause::find_table_def(TABLE_LIST *table,
-                                          With_element *barrier)
+                                          With_element *barrier,
+                                          st_select_lex_unit *excl_spec)
 {
   for (With_element *with_elem= with_list.first; 
        with_elem != barrier;
        with_elem= with_elem->next)
   {
+    if (excl_spec && with_elem->spec == excl_spec)
+      continue;
     if (my_strcasecmp(system_charset_info, with_elem->get_name_str(),
                       table->table_name.str) == 0 &&
         !table->is_fqtn)
@@ -466,7 +473,7 @@ With_element *find_table_def_in_with_clauses(TABLE_LIST *tbl,
           top_unit->with_element &&
           top_unit->with_element->get_owner() == with_clause)
         barrier= top_unit->with_element;
-      found= with_clause->find_table_def(tbl, barrier);
+      found= with_clause->find_table_def(tbl, barrier, NULL);
       if (found)
         break;
     }
@@ -521,10 +528,11 @@ void With_element::check_dependencies_in_select(st_select_lex *sl,
     {
       With_clause *with_clause= sl->master_unit()->with_clause;
       if (with_clause)
-        tbl->with= with_clause->find_table_def(tbl, NULL);
+        tbl->with= with_clause->find_table_def(tbl, NULL, NULL);
       if (!tbl->with)
         tbl->with= owner->find_table_def(tbl,
-                                         owner->with_recursive ? NULL : this);
+                                         owner->with_recursive ? NULL : this,
+                                         NULL);
     }
     if (!tbl->with)
       tbl->with= find_table_def_in_with_clauses(tbl, ctxt);
@@ -1101,7 +1109,8 @@ st_select_lex_unit *With_element::clone_parsed_spec(LEX *old_lex,
   */
   lex->only_cte_resolution= old_lex->only_cte_resolution;
   if (lex->resolve_references_to_cte(lex->query_tables,
-                                     lex->query_tables_last))
+                                     lex->query_tables_last,
+                                     spec))
   {
     res= NULL;
     goto err;
@@ -1304,6 +1313,7 @@ bool With_element::is_anchor(st_select_lex *sel)
      Search for the definition of the given table referred in this select node
 
   @param table  reference to the table whose definition is searched for
+  @param excl_spec  ignore the definition with this spec
      
   @details  
     The method looks for the definition of the table whose reference is occurred
@@ -1316,7 +1326,8 @@ bool With_element::is_anchor(st_select_lex *sel)
     NULL -  otherwise
 */    
 
-With_element *st_select_lex::find_table_def_in_with_clauses(TABLE_LIST *table)
+With_element *st_select_lex::find_table_def_in_with_clauses(TABLE_LIST *table,
+                                                 st_select_lex_unit *excl_spec)
 {
   With_element *found= NULL;
   With_clause *containing_with_clause= NULL;
@@ -1333,7 +1344,7 @@ With_element *st_select_lex::find_table_def_in_with_clauses(TABLE_LIST *table)
     With_clause *attached_with_clause= sl->get_with_clause();
     if (attached_with_clause &&
         attached_with_clause != containing_with_clause &&
-        (found= attached_with_clause->find_table_def(table, NULL)))
+        (found= attached_with_clause->find_table_def(table, NULL, excl_spec)))
       break;
     master_unit= sl->master_unit();
     outer_sl= master_unit->outer_select();
@@ -1343,7 +1354,8 @@ With_element *st_select_lex::find_table_def_in_with_clauses(TABLE_LIST *table)
       containing_with_clause= with_elem->get_owner();
       With_element *barrier= containing_with_clause->with_recursive ?
                                NULL : with_elem;
-      if ((found= containing_with_clause->find_table_def(table, barrier)))
+      if ((found= containing_with_clause->find_table_def(table, barrier,
+                                                         excl_spec)))
         break;
       if (outer_sl && !outer_sl->get_with_element())
         break;
diff --git a/sql/sql_cte.h b/sql/sql_cte.h
index 6a1f67d3258..1da7c6c323a 100644
--- a/sql/sql_cte.h
+++ b/sql/sql_cte.h
@@ -325,7 +325,8 @@ public:
 
   friend
   bool LEX::resolve_references_to_cte(TABLE_LIST *tables,
-                                      TABLE_LIST **tables_last);
+                                      TABLE_LIST **tables_last,
+                                      st_select_lex_unit *excl_spec);
 };
 
 const uint max_number_of_elements_in_with_clause= sizeof(table_map)*8;
@@ -425,7 +426,8 @@ public:
 
   void move_anchors_ahead();
 
-  With_element *find_table_def(TABLE_LIST *table, With_element *barrier);
+  With_element *find_table_def(TABLE_LIST *table, With_element *barrier,
+                               st_select_lex_unit *excl_spec);
 
   With_element *find_table_def_in_with_clauses(TABLE_LIST *table);
 
diff --git a/sql/sql_lex.h b/sql/sql_lex.h
index d032fd96f7d..b6d91896142 100644
--- a/sql/sql_lex.h
+++ b/sql/sql_lex.h
@@ -1560,7 +1560,8 @@ public:
            master_unit()->cloned_from->with_element :
            master_unit()->with_element;
   }
-  With_element *find_table_def_in_with_clauses(TABLE_LIST *table);
+  With_element *find_table_def_in_with_clauses(TABLE_LIST *table,
+                                               st_select_lex_unit * excl_spec);
   bool check_unrestricted_recursive(bool only_standard_compliant);
   bool check_subqueries_with_recursive_references();
   void collect_grouping_fields_for_derived(THD *thd, ORDER *grouping_list);
@@ -4843,7 +4844,8 @@ public:
   bool check_dependencies_in_with_clauses();
   bool check_cte_dependencies_and_resolve_references();
   bool resolve_references_to_cte(TABLE_LIST *tables,
-                                 TABLE_LIST **tables_last);
+                                 TABLE_LIST **tables_last,
+                                 st_select_lex_unit *excl_spec);
 };
 
 
diff --git a/sql/sql_sequence.cc b/sql/sql_sequence.cc
index f5652bd8886..f6d7c310a2f 100644
--- a/sql/sql_sequence.cc
+++ b/sql/sql_sequence.cc
@@ -921,6 +921,7 @@ bool Sql_cmd_alter_sequence::execute(THD *thd)
   TABLE_LIST *first_table= lex->query_tables;
   TABLE *table;
   sequence_definition *new_seq= lex->create_info.seq_create_info;
+  uint saved_used_fields= new_seq->used_fields;
   SEQUENCE *seq;
   No_such_table_error_handler no_such_table_handler;
   DBUG_ENTER("Sql_cmd_alter_sequence::execute");
@@ -1042,5 +1043,6 @@ bool Sql_cmd_alter_sequence::execute(THD *thd)
     my_ok(thd);
 
 end:
+  new_seq->used_fields= saved_used_fields;
   DBUG_RETURN(error);
 }
diff --git a/sql/sql_view.cc b/sql/sql_view.cc
index c633115edd0..660e1b35cf9 100644
--- a/sql/sql_view.cc
+++ b/sql/sql_view.cc
@@ -293,7 +293,8 @@ bool create_view_precheck(THD *thd, TABLE_LIST *tables, TABLE_LIST *view,
     for (tbl= sl->get_table_list(); tbl; tbl= tbl->next_local)
     {
       if (!tbl->with && tbl->select_lex)
-        tbl->with= tbl->select_lex->find_table_def_in_with_clauses(tbl);
+      tbl->with= tbl->select_lex->find_table_def_in_with_clauses(tbl,
+                                                                 NULL);
       /*
         Ensure that we have some privileges on this table, more strict check
         will be done on column level after preparation,
diff --git a/sql/table_cache.cc b/sql/table_cache.cc
index 425e1e18393..499e82fafea 100644
--- a/sql/table_cache.cc
+++ b/sql/table_cache.cc
@@ -1195,8 +1195,8 @@ int tdc_iterate(THD *thd, my_hash_walk_action action, void *argument,
 }
 
 
-int show_tc_active_instances(THD *thd, SHOW_VAR *var, char *buff,
-                             enum enum_var_type scope)
+int show_tc_active_instances(THD *thd, SHOW_VAR *var, void *buff,
+                             system_status_var *, enum enum_var_type scope)
 {
   var->type= SHOW_UINT;
   var->value= buff;
diff --git a/sql/table_cache.h b/sql/table_cache.h
index 433df5e0328..71704ff2ed0 100644
--- a/sql/table_cache.h
+++ b/sql/table_cache.h
@@ -87,8 +87,8 @@ extern int tdc_iterate(THD *thd, my_hash_walk_action action, void *argument,
                        bool no_dups= false);
 
 extern uint tc_records(void);
-int show_tc_active_instances(THD *thd, SHOW_VAR *var, char *buff,
-                             enum enum_var_type scope);
+int show_tc_active_instances(THD *thd, SHOW_VAR *var, void *buff,
+                             system_status_var *, enum enum_var_type scope);
 extern void tc_purge();
 extern void tc_add_table(THD *thd, TABLE *table);
 extern void tc_release_table(TABLE *table);
diff --git a/storage/connect/tabvct.cpp b/storage/connect/tabvct.cpp
index 9cf5f41d1fe..f5710688d3c 100644
--- a/storage/connect/tabvct.cpp
+++ b/storage/connect/tabvct.cpp
@@ -71,11 +71,6 @@
 #include "tabvct.h"
 #include "valblk.h"
 
-#if defined(UNIX)
-//add dummy strerror   (NGC)
-char *strerror(int num);
-#endif   // UNIX
-
 /***********************************************************************/
 /*  External function.                                                 */
 /***********************************************************************/
diff --git a/storage/sphinx/ha_sphinx.cc b/storage/sphinx/ha_sphinx.cc
index 0ca08bc3c47..6bc6e274d00 100644
--- a/storage/sphinx/ha_sphinx.cc
+++ b/storage/sphinx/ha_sphinx.cc
@@ -3538,7 +3538,8 @@ CSphSEStats * sphinx_get_stats ( THD * thd, SHOW_VAR * out )
 	return 0;
 }
 
-int sphinx_showfunc_total ( THD * thd, SHOW_VAR * out, char * )
+static int sphinx_showfunc_total ( THD * thd, SHOW_VAR * out, void *,
+                                   system_status_var *, enum_var_type )
 {
 	CSphSEStats * pStats = sphinx_get_stats ( thd, out );
 	if ( pStats )
@@ -3549,7 +3550,8 @@ int sphinx_showfunc_total ( THD * thd, SHOW_VAR * out, char * )
 	return 0;
 }
 
-int sphinx_showfunc_total_found ( THD * thd, SHOW_VAR * out, char * )
+static int sphinx_showfunc_total_found ( THD * thd, SHOW_VAR * out, void *,
+                                         system_status_var *, enum_var_type )
 {
 	CSphSEStats * pStats = sphinx_get_stats ( thd, out );
 	if ( pStats )
@@ -3560,7 +3562,8 @@ int sphinx_showfunc_total_found ( THD * thd, SHOW_VAR * out, char * )
 	return 0;
 }
 
-int sphinx_showfunc_time ( THD * thd, SHOW_VAR * out, char * )
+static int sphinx_showfunc_time ( THD * thd, SHOW_VAR * out, void *,
+                                  system_status_var *, enum_var_type )
 {
 	CSphSEStats * pStats = sphinx_get_stats ( thd, out );
 	if ( pStats )
@@ -3571,7 +3574,8 @@ int sphinx_showfunc_time ( THD * thd, SHOW_VAR * out, char * )
 	return 0;
 }
 
-int sphinx_showfunc_word_count ( THD * thd, SHOW_VAR * out, char * )
+static int sphinx_showfunc_word_count ( THD * thd, SHOW_VAR * out, void *,
+                                        system_status_var *, enum_var_type )
 {
 	CSphSEStats * pStats = sphinx_get_stats ( thd, out );
 	if ( pStats )
@@ -3582,9 +3586,11 @@ int sphinx_showfunc_word_count ( THD * thd, SHOW_VAR * out, char * )
 	return 0;
 }
 
-int sphinx_showfunc_words ( THD * thd, SHOW_VAR * out, char * sBuffer )
+static int sphinx_showfunc_words ( THD * thd, SHOW_VAR * out, void * buf,
+                                   system_status_var *, enum_var_type )
 {
 #if MYSQL_VERSION_ID>50100
+	char *sBuffer = static_cast<char*>(buf);
 	if ( sphinx_hton_ptr )
 	{
 		CSphTLS * pTls = (CSphTLS *) thd_get_ha_data ( thd, sphinx_hton_ptr );
@@ -3639,7 +3645,8 @@ int sphinx_showfunc_words ( THD * thd, SHOW_VAR * out, char * sBuffer )
 	return 0;
 }
 
-int sphinx_showfunc_error ( THD * thd, SHOW_VAR * out, char * )
+static int sphinx_showfunc_error ( THD * thd, SHOW_VAR * out, void *,
+                                   system_status_var *, enum_var_type )
 {
 	CSphSEStats * pStats = sphinx_get_stats ( thd, out );
 	out->type = SHOW_CHAR;
diff --git a/storage/sphinx/ha_sphinx.h b/storage/sphinx/ha_sphinx.h
index f03e9d8c797..5a1541f1d2e 100644
--- a/storage/sphinx/ha_sphinx.h
+++ b/storage/sphinx/ha_sphinx.h
@@ -164,12 +164,6 @@ private:
 bool sphinx_show_status ( THD * thd );
 #endif
 
-int sphinx_showfunc_total_found ( THD *, SHOW_VAR *, char * );
-int sphinx_showfunc_total ( THD *, SHOW_VAR *, char * );
-int sphinx_showfunc_time ( THD *, SHOW_VAR *, char * );
-int sphinx_showfunc_word_count ( THD *, SHOW_VAR *, char * );
-int sphinx_showfunc_words ( THD *, SHOW_VAR *, char * );
-
 //
 // $Id: ha_sphinx.h 4818 2014-09-24 08:53:38Z tomat $
 //
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_26151.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_26151.result
index b0a430e0e21..326b84a030e 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_26151.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_26151.result
@@ -6,6 +6,9 @@ for child2
 for child3
 set @old_spider_bgs_mode= @@spider_bgs_mode;
 set session spider_bgs_mode=1;
+set spider_same_server_link=1;
+set @old_spider_same_server_link=@@global.spider_same_server_link;
+set global spider_same_server_link=1;
 CREATE SERVER $srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 create table td (a int, PRIMARY KEY (a));
 create table ts (a int, PRIMARY KEY (a)) ENGINE=Spider COMMENT='WRAPPER "mysql", srv "srv_mdev_26151",TABLE "td", casual_read "3"';
@@ -26,6 +29,7 @@ min(a)
 drop table td, ts;
 drop server srv_mdev_26151;
 set session spider_bgs_mode=@old_spider_bgs_mode;
+set global spider_same_server_link=@old_spider_same_server_link;
 for master_1
 for child2
 for child3
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_28739_simple.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_28739_simple.result
index db232f8a6d3..1c337c3d2dd 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_28739_simple.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_28739_simple.result
@@ -5,6 +5,7 @@ for master_1
 for child2
 for child3
 set global query_cache_type= on;
+set spider_same_server_link=1;
 CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 create table t2 (c int);
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_28856.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_28856.result
index fae3cc6b6ce..7e4fd3cd084 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_28856.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_28856.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 # testing monitoring_*
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_28998.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_28998.result
index edac80d9761..e92fb199575 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_28998.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_28998.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER s FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 CREATE TABLE t1 (a INT);
 INSERT INTO t1 VALUES (1),(2);
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_29163.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_29163.result
index af4bef1efa9..f58ab605e11 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_29163.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_29163.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER s FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 CREATE TABLE t1 (a INT);
 CREATE TABLE t2 (b INT);
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_29456.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_29456.result
index 4d9095830d1..365c3d6373a 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_29456.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_29456.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 create table t1 (c int);
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_29502.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_29502.result
index 54c5e9a6473..7749898eb6f 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_29502.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_29502.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER $srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 CREATE TABLE t (a INT);
 INSERT INTO t VALUES (23),(48);
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_29963.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_29963.result
index 17390346a99..604515964f3 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_29963.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_29963.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 CREATE TABLE t (a INT) ENGINE=Spider;
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_30014.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_30014.result
index e1dca495047..ee53009e3f2 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_30014.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_30014.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 create table t1 (c int);
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_30392.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_30392.result
index 58873d2c6e5..cefa5248d44 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_30392.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_30392.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 CREATE TABLE t1 (a INT);
 INSERT INTO t1 VALUES (1),(2);
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_31338.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_31338.result
index 62b06336ff6..f156cf38a15 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_31338.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_31338.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 CREATE TABLE t (c BLOB) ENGINE=InnoDB;
 CREATE TABLE ts (c BLOB) ENGINE=Spider COMMENT='WRAPPER "mysql",srv "srv",TABLE "t"';
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_31524.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_31524.result
index 645fc62862d..b3a4c752565 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_31524.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_31524.result
@@ -5,6 +5,7 @@ for master_1
 for child2
 for child3
 SET @old_spider_read_only_mode = @@session.spider_read_only_mode;
+set spider_same_server_link=1;
 CREATE SERVER $srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 set session spider_read_only_mode = default;
 create table t2 (c int);
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_31645.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_31645.result
index 94b76de7df4..5197abd3fb6 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_31645.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_31645.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 CREATE TABLE t1 ( a bigint(20) NOT NULL, b bigint(20) DEFAULT 0, PRIMARY KEY (a));
 CREATE TABLE t2 ( a bigint(20) NOT NULL, b bigint(20) DEFAULT 0, PRIMARY KEY (a)) ENGINE=SPIDER COMMENT='srv "srv", WRAPPER "mysql", TABLE "t1"';
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_31996.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_31996.result
index 04d7e884676..cbc91432dbc 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_31996.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_31996.result
@@ -1,6 +1,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 set session spider_delete_all_rows_type=0;
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_32986.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_32986.result
index bdc580d421a..c3bdef9870d 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/mdev_32986.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_32986.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 create table t2 (c varchar(16));
diff --git a/storage/spider/mysql-test/spider/bugfix/r/mdev_33008.result b/storage/spider/mysql-test/spider/bugfix/r/mdev_33008.result
new file mode 100644
index 00000000000..3bcb4bb038a
--- /dev/null
+++ b/storage/spider/mysql-test/spider/bugfix/r/mdev_33008.result
@@ -0,0 +1,25 @@
+for master_1
+for child2
+for child3
+set spider_same_server_link=on;
+CREATE SERVER srv FOREIGN DATA WRAPPER mysql
+OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
+create table t2 (
+`id` int(11) NOT NULL AUTO_INCREMENT,
+`code` varchar(10) DEFAULT NULL,
+PRIMARY KEY (`id`)
+);
+create table t1 ENGINE=Spider
+COMMENT='WRAPPER "mysql", srv "srv",TABLE "t2"';
+show create table t1;
+Table	Create Table
+t1	CREATE TABLE `t1` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `code` varchar(10) DEFAULT NULL,
+  PRIMARY KEY (`id`)
+) ENGINE=SPIDER DEFAULT CHARSET=latin1 COLLATE=latin1_swedish_ci COMMENT='WRAPPER "mysql", srv "srv",TABLE "t2"'
+drop table t1, t2;
+drop server srv;
+for master_1
+for child2
+for child3
diff --git a/storage/spider/mysql-test/spider/bugfix/r/self_reference_multi.result b/storage/spider/mysql-test/spider/bugfix/r/self_reference_multi.result
index 196e48d5a52..0118f57578f 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/self_reference_multi.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/self_reference_multi.result
@@ -4,6 +4,9 @@ for child3
 
 MDEV-6268 SPIDER table with no COMMENT clause causes queries to wait forever
 
+set spider_same_server_link=1;
+set @old_spider_same_server_link=@@global.spider_same_server_link;
+set global spider_same_server_link=1;
 CREATE SERVER $srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 create table t2 (c int);
 create table t1 (c int) ENGINE=Spider COMMENT='WRAPPER "mysql", srv "srv_self_reference_multi",TABLE "t2"';
@@ -17,6 +20,7 @@ select * from t2;
 ERROR HY000: An infinite loop is detected when opening table test.t0
 drop table t0, t1, t2;
 drop server srv_self_reference_multi;
+set global spider_same_server_link=@old_spider_same_server_link;
 for master_1
 for child2
 for child3
diff --git a/storage/spider/mysql-test/spider/bugfix/r/spider_join_with_non_spider.result b/storage/spider/mysql-test/spider/bugfix/r/spider_join_with_non_spider.result
index b9c1c5c9de5..420ca657a33 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/spider_join_with_non_spider.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/spider_join_with_non_spider.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 create table t1 (c int);
 create table t2 (d int);
diff --git a/storage/spider/mysql-test/spider/bugfix/r/subquery.result b/storage/spider/mysql-test/spider/bugfix/r/subquery.result
index c6ea45e2dc0..280f57155bd 100644
--- a/storage/spider/mysql-test/spider/bugfix/r/subquery.result
+++ b/storage/spider/mysql-test/spider/bugfix/r/subquery.result
@@ -4,6 +4,7 @@
 for master_1
 for child2
 for child3
+set spider_same_server_link=1;
 CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 create table t1 (c1 int);
 create table t2 (c2 int);
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_26151.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_26151.test
index f9e157d33e6..dcf1438fb80 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_26151.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_26151.test
@@ -14,6 +14,10 @@
 --let $srv=srv_mdev_26151
 set @old_spider_bgs_mode= @@spider_bgs_mode;
 set session spider_bgs_mode=1;
+set spider_same_server_link=1;
+set @old_spider_same_server_link=@@global.spider_same_server_link;
+set global spider_same_server_link=1;
+
 evalp CREATE SERVER $srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
 # casual_read != 0 && casual_read != 1
@@ -42,6 +46,7 @@ drop table td, ts;
 
 eval drop server $srv;
 set session spider_bgs_mode=@old_spider_bgs_mode;
+set global spider_same_server_link=@old_spider_same_server_link;
 
 --disable_query_log
 --disable_result_log
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_28739_simple.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_28739_simple.test
index 7a011520bb6..feff85df6b3 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_28739_simple.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_28739_simple.test
@@ -12,6 +12,7 @@
 #set @@global.debug_dbug="d:t:i:o,mysqld.trace";
 
 set global query_cache_type= on;
+set spider_same_server_link=1;
 evalp CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 create table t2 (c int);
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_28856.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_28856.test
index 4f23168ec1b..a1642f7a9cd 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_28856.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_28856.test
@@ -9,6 +9,7 @@
 
 # This test covers some table params under consideration for inclusion
 # in the engine-defined options to be implemented in MDEV-28856.
+set spider_same_server_link=1;
 evalp CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_28998.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_28998.test
index e1735706341..66e3a15addb 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_28998.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_28998.test
@@ -12,6 +12,7 @@ if (`select not(count(*)) from information_schema.system_variables where variabl
 --source ../../t/test_init.inc
 --enable_result_log
 --enable_query_log
+set spider_same_server_link=1;
 evalp CREATE SERVER s FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
 CREATE TABLE t1 (a INT);
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_29163.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_29163.test
index ac116fd0e4f..2e56583d831 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_29163.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_29163.test
@@ -6,6 +6,7 @@
 --source ../../t/test_init.inc
 --enable_result_log
 --enable_query_log
+set spider_same_server_link=1;
 evalp CREATE SERVER s FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
 CREATE TABLE t1 (a INT);
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_29456.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_29456.test
index 16291f82075..89d53227c6c 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_29456.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_29456.test
@@ -8,6 +8,7 @@
 --enable_result_log
 --enable_query_log
 
+set spider_same_server_link=1;
 evalp CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_29502.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_29502.test
index 88591f803f5..bacf5073125 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_29502.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_29502.test
@@ -8,6 +8,7 @@
 --enable_result_log
 --enable_query_log
 
+set spider_same_server_link=1;
 --let $srv=srv_mdev_29502
 evalp CREATE SERVER $srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_29963.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_29963.test
index ab7a4ded07c..93b38c7963c 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_29963.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_29963.test
@@ -7,6 +7,7 @@
 --enable_result_log
 --enable_query_log
 
+set spider_same_server_link=1;
 evalp CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_30014.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_30014.test
index 4dc3dafab24..9c59adc80dd 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_30014.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_30014.test
@@ -7,6 +7,7 @@
 --enable_result_log
 --enable_query_log
 
+set spider_same_server_link=1;
 evalp CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_30392.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_30392.test
index 03417013b07..36e06f3f3c4 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_30392.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_30392.test
@@ -6,6 +6,7 @@
 --source ../../t/test_init.inc
 --enable_result_log
 --enable_query_log
+set spider_same_server_link=1;
 evalp CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
 CREATE TABLE t1 (a INT);
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_31338.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_31338.test
index e628c3b921d..a3698c97717 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_31338.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_31338.test
@@ -9,6 +9,7 @@
 --enable_result_log
 --enable_query_log
 
+set spider_same_server_link=1;
 evalp CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 CREATE TABLE t (c BLOB) ENGINE=InnoDB;
 CREATE TABLE ts (c BLOB) ENGINE=Spider COMMENT='WRAPPER "mysql",srv "srv",TABLE "t"';
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_31524.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_31524.test
index 64cbf4154aa..a5942fad2b3 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_31524.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_31524.test
@@ -10,6 +10,7 @@
 
 --let $srv=srv_mdev_31524
 SET @old_spider_read_only_mode = @@session.spider_read_only_mode;
+set spider_same_server_link=1;
 evalp CREATE SERVER $srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
 # when the user does not set var nor the table option, the default
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_31645.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_31645.test
index bec9dd6c316..4dfe3b57e50 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_31645.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_31645.test
@@ -6,6 +6,7 @@
 --source ../../t/test_init.inc
 --enable_result_log
 --enable_query_log
+set spider_same_server_link=1;
 evalp CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
 CREATE TABLE t1 ( a bigint(20) NOT NULL, b bigint(20) DEFAULT 0, PRIMARY KEY (a));
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_31996.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_31996.test
index 3e823790c82..93b004a06eb 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_31996.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_31996.test
@@ -4,6 +4,7 @@
 --enable_result_log
 --enable_query_log
 
+set spider_same_server_link=1;
 evalp CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_32986.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_32986.test
index 94081d24ad8..144387452f7 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/mdev_32986.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_32986.test
@@ -6,6 +6,7 @@
 --source ../../t/test_init.inc
 --enable_result_log
 --enable_query_log
+set spider_same_server_link=1;
 evalp CREATE SERVER srv FOREIGN DATA WRAPPER mysql
 OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 
diff --git a/storage/spider/mysql-test/spider/bugfix/t/mdev_33008.test b/storage/spider/mysql-test/spider/bugfix/t/mdev_33008.test
new file mode 100644
index 00000000000..48d9a4f01ec
--- /dev/null
+++ b/storage/spider/mysql-test/spider/bugfix/t/mdev_33008.test
@@ -0,0 +1,24 @@
+--disable_query_log
+--disable_result_log
+--source ../../t/test_init.inc
+--enable_result_log
+--enable_query_log
+set spider_same_server_link=on;
+evalp CREATE SERVER srv FOREIGN DATA WRAPPER mysql
+OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
+create table t2 (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `code` varchar(10) DEFAULT NULL,
+  PRIMARY KEY (`id`)
+);
+create table t1 ENGINE=Spider
+COMMENT='WRAPPER "mysql", srv "srv",TABLE "t2"';
+show create table t1;
+drop table t1, t2;
+
+drop server srv;
+--disable_query_log
+--disable_result_log
+--source ../../t/test_deinit.inc
+--enable_result_log
+--enable_query_log
diff --git a/storage/spider/mysql-test/spider/bugfix/t/self_reference_multi.test b/storage/spider/mysql-test/spider/bugfix/t/self_reference_multi.test
index 2ac927d99b3..4263560baa1 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/self_reference_multi.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/self_reference_multi.test
@@ -8,6 +8,9 @@
 --echo MDEV-6268 SPIDER table with no COMMENT clause causes queries to wait forever
 --echo
 
+set spider_same_server_link=1;
+set @old_spider_same_server_link=@@global.spider_same_server_link;
+set global spider_same_server_link=1;
 --let $srv=srv_self_reference_multi
 evalp CREATE SERVER $srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 create table t2 (c int);
@@ -22,6 +25,7 @@ select * from t1;
 select * from t2;
 drop table t0, t1, t2;
 eval drop server $srv;
+set global spider_same_server_link=@old_spider_same_server_link;
 
 --disable_query_log
 --disable_result_log
diff --git a/storage/spider/mysql-test/spider/bugfix/t/spider_join_with_non_spider.test b/storage/spider/mysql-test/spider/bugfix/t/spider_join_with_non_spider.test
index 7b5d38014ed..294b469a8a5 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/spider_join_with_non_spider.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/spider_join_with_non_spider.test
@@ -8,6 +8,7 @@
 --enable_result_log
 --enable_query_log
 
+set spider_same_server_link=1;
 evalp CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 create table t1 (c int);
 create table t2 (d int);
diff --git a/storage/spider/mysql-test/spider/bugfix/t/subquery.test b/storage/spider/mysql-test/spider/bugfix/t/subquery.test
index 7a50719603d..70238a524a6 100644
--- a/storage/spider/mysql-test/spider/bugfix/t/subquery.test
+++ b/storage/spider/mysql-test/spider/bugfix/t/subquery.test
@@ -6,6 +6,7 @@
 --source ../../t/test_init.inc
 --enable_result_log
 --enable_query_log
+set spider_same_server_link=1;
 evalp CREATE SERVER srv FOREIGN DATA WRAPPER MYSQL OPTIONS (SOCKET "$MASTER_1_MYSOCK", DATABASE 'test',user 'root');
 create table t1 (c1 int);
 create table t2 (c2 int);
diff --git a/storage/spider/spd_db_mysql.cc b/storage/spider/spd_db_mysql.cc
index 6776947d24d..e184040c69f 100644
--- a/storage/spider/spd_db_mysql.cc
+++ b/storage/spider/spd_db_mysql.cc
@@ -1579,10 +1579,13 @@ int spider_db_mbase_result::fetch_index_for_discover_table_structure(
     }
     DBUG_RETURN(0);
   }
-  if (num_fields() != 13)
+  if (num_fields() < 13)
   {
-    DBUG_PRINT("info",("spider num_fields != 13"));
-    my_printf_error(ER_SPIDER_UNKNOWN_NUM, ER_SPIDER_UNKNOWN_STR, MYF(0));
+    DBUG_PRINT("info",("spider num_fields < 13"));
+    my_printf_error(ER_SPIDER_CANT_NUM, ER_SPIDER_CANT_STR1, MYF(0),
+                    "fetch index for table structure discovery because of "
+                    "wrong number of columns in SHOW INDEX FROM output: ",
+                    num_fields());
     DBUG_RETURN(ER_SPIDER_UNKNOWN_NUM);
   }
   bool first = TRUE;
@@ -1995,7 +1998,7 @@ int spider_db_mbase::connect(
 
     if (!spider_param_same_server_link(thd))
     {
-      if (!strcmp(tgt_host, my_localhost))
+      if (!strcmp(tgt_host, my_localhost) || !tgt_host || !tgt_host[0])
       {
         if (!strcmp(tgt_socket, *spd_mysqld_unix_port))
         {
@@ -2005,7 +2008,7 @@ int spider_db_mbase::connect(
           DBUG_RETURN(ER_SPIDER_SAME_SERVER_LINK_NUM);
         }
       } else if (!strcmp(tgt_host, "127.0.0.1") ||
-        !strcmp(tgt_host, glob_hostname))
+        !strcmp(tgt_host, glob_hostname) || !tgt_host || !tgt_host[0])
       {
         if (tgt_port == (long) *spd_mysqld_port)
         {
diff --git a/storage/spider/spd_param.cc b/storage/spider/spd_param.cc
index 90be2c045b9..155ea5275ab 100644
--- a/storage/spider/spd_param.cc
+++ b/storage/spider/spd_param.cc
@@ -117,7 +117,8 @@ extern volatile ulonglong spider_mon_table_cache_version_req;
   }
 
 #ifdef HANDLER_HAS_DIRECT_UPDATE_ROWS
-static int spider_direct_update(THD *thd, SHOW_VAR *var, char *buff)
+static int spider_direct_update(THD *thd, SHOW_VAR *var, void *,
+                                system_status_var *, enum_var_type)
 {
   int error_num = 0;
   SPIDER_TRX *trx;
@@ -128,7 +129,8 @@ static int spider_direct_update(THD *thd, SHOW_VAR *var, char *buff)
   DBUG_RETURN(error_num);
 }
 
-static int spider_direct_delete(THD *thd, SHOW_VAR *var, char *buff)
+static int spider_direct_delete(THD *thd, SHOW_VAR *var, void *,
+                                system_status_var *, enum_var_type)
 {
   int error_num = 0;
   SPIDER_TRX *trx;
@@ -140,7 +142,8 @@ static int spider_direct_delete(THD *thd, SHOW_VAR *var, char *buff)
 }
 #endif
 
-static int spider_direct_order_limit(THD *thd, SHOW_VAR *var, char *buff)
+static int spider_direct_order_limit(THD *thd, SHOW_VAR *var, void *,
+                                     system_status_var *, enum_var_type)
 {
   int error_num = 0;
   SPIDER_TRX *trx;
@@ -151,7 +154,8 @@ static int spider_direct_order_limit(THD *thd, SHOW_VAR *var, char *buff)
   DBUG_RETURN(error_num);
 }
 
-static int spider_direct_aggregate(THD *thd, SHOW_VAR *var, char *buff)
+static int spider_direct_aggregate(THD *thd, SHOW_VAR *var, void *,
+                                   system_status_var *, enum_var_type)
 {
   int error_num = 0;
   SPIDER_TRX *trx;
@@ -162,7 +166,8 @@ static int spider_direct_aggregate(THD *thd, SHOW_VAR *var, char *buff)
   DBUG_RETURN(error_num);
 }
 
-static int spider_parallel_search(THD *thd, SHOW_VAR *var, char *buff)
+static int spider_parallel_search(THD *thd, SHOW_VAR *var, void *,
+                                  system_status_var *, enum_var_type)
 {
   int error_num = 0;
   SPIDER_TRX *trx;
@@ -174,7 +179,8 @@ static int spider_parallel_search(THD *thd, SHOW_VAR *var, char *buff)
 }
 
 #if defined(HS_HAS_SQLCOM) && defined(HAVE_HANDLERSOCKET)
-static int spider_hs_result_free(THD *thd, SHOW_VAR *var, char *buff)
+static int spider_hs_result_free(THD *thd, SHOW_VAR *var, void *,
+                                 system_status_var *, enum_var_type)
 {
   int error_num = 0;
   SPIDER_TRX *trx;