Merge 10.4 into 10.5

38 files changed, 768 insertions, 603 deletions

diff --git a/cmake/cpack_rpm.cmake b/cmake/cpack_rpm.cmake
index 630936b746c..4f33f6f951d 100644
--- a/cmake/cpack_rpm.cmake
+++ b/cmake/cpack_rpm.cmake
@@ -240,6 +240,7 @@ ELSEIF(RPM MATCHES "(rhel|centos)8")
   ALTERNATIVE_NAME("server" "mariadb-server-utils")
   ALTERNATIVE_NAME("shared" "mariadb-connector-c" ${MARIADB_CONNECTOR_C_VERSION}-1)
   ALTERNATIVE_NAME("shared" "mariadb-connector-c-config" ${MARIADB_CONNECTOR_C_VERSION}-1)
+  ALTERNATIVE_NAME("devel" "mariadb-connector-c-devel" ${MARIADB_CONNECTOR_C_VERSION}-1)
   SETA(CPACK_RPM_client_PACKAGE_PROVIDES "mariadb-galera = 3:%{version}-%{release}")
   SETA(CPACK_RPM_common_PACKAGE_PROVIDES "mariadb-galera-common = 3:%{version}-%{release}")
   SETA(CPACK_RPM_common_PACKAGE_REQUIRES "MariaDB-shared")
diff --git a/extra/mariabackup/datasink.cc b/extra/mariabackup/datasink.cc
index 29bdc061014..a576526d7ff 100644
--- a/extra/mariabackup/datasink.cc
+++ b/extra/mariabackup/datasink.cc
@@ -23,7 +23,6 @@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1335  USA
 #include "common.h"
 #include "datasink.h"
 #include "ds_compress.h"
-#include "ds_archive.h"
 #include "ds_xbstream.h"
 #include "ds_local.h"
 #include "ds_stdout.h"
@@ -45,13 +44,6 @@ ds_create(const char *root, ds_type_t type)
 	case DS_TYPE_LOCAL:
 		ds = &datasink_local;
 		break;
-	case DS_TYPE_ARCHIVE:
-#ifdef HAVE_LIBARCHIVE
-		ds = &datasink_archive;
-#else
-		die("mariabackup was built without libarchive support");
-#endif
-		break;
 	case DS_TYPE_XBSTREAM:
 		ds = &datasink_xbstream;
 		break;
diff --git a/extra/mariabackup/datasink.h b/extra/mariabackup/datasink.h
index 5c82556b9ba..4bede4ec9e7 100644
--- a/extra/mariabackup/datasink.h
+++ b/extra/mariabackup/datasink.h
@@ -63,7 +63,6 @@ static inline int dummy_remove(const char *) {
 typedef enum {
 	DS_TYPE_STDOUT,
 	DS_TYPE_LOCAL,
-	DS_TYPE_ARCHIVE,
 	DS_TYPE_XBSTREAM,
 	DS_TYPE_COMPRESS,
 	DS_TYPE_ENCRYPT,
diff --git a/extra/mariabackup/ds_archive.cc b/extra/mariabackup/ds_archive.cc
deleted file mode 100644
index 3a5081119b3..00000000000
--- a/extra/mariabackup/ds_archive.cc
+++ /dev/null
@@ -1,282 +0,0 @@
-/******************************************************
-Copyright (c) 2013 Percona LLC and/or its affiliates.
-
-Streaming implementation for XtraBackup.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; version 2 of the License.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1335  USA
-
-*******************************************************/
-
-#include <my_global.h>
-#include <my_base.h>
-#include <archive.h>
-#include <archive_entry.h>
-#include "common.h"
-#include "datasink.h"
-
-#if ARCHIVE_VERSION_NUMBER < 3000000
-#define archive_write_add_filter_none(X) archive_write_set_compression_none(X)
-#define archive_write_free(X) archive_write_finish(X)
-#endif
-
-typedef struct {
-	struct archive	*archive;
-	ds_file_t	*dest_file;
-	pthread_mutex_t	mutex;
-} ds_archive_ctxt_t;
-
-typedef struct {
-	struct archive_entry	*entry;
-	ds_archive_ctxt_t	*archive_ctxt;
-} ds_archive_file_t;
-
-
-/***********************************************************************
-General archive interface */
-
-static ds_ctxt_t *archive_init(const char *root);
-static ds_file_t *archive_open(ds_ctxt_t *ctxt, const char *path,
-			      MY_STAT *mystat);
-static int archive_write(ds_file_t *file, const void *buf, size_t len);
-static int archive_close(ds_file_t *file);
-static void archive_deinit(ds_ctxt_t *ctxt);
-
-datasink_t datasink_archive = {
-	&archive_init,
-	&archive_open,
-	&archive_write,
-	&archive_close,
-	&dummy_remove,
-	&archive_deinit
-};
-
-static
-int
-my_archive_open_callback(struct archive *a __attribute__((unused)),
-		      void *data __attribute__((unused)))
-{
-	return ARCHIVE_OK;
-}
-
-static
-ssize_t
-my_archive_write_callback(struct archive *a __attribute__((unused)),
-		       void *data, const void *buffer, size_t length)
-{
-	ds_archive_ctxt_t	*archive_ctxt;
-
-	archive_ctxt = (ds_archive_ctxt_t *) data;
-
-	xb_ad(archive_ctxt != NULL);
-	xb_ad(archive_ctxt->dest_file != NULL);
-
-	if (!ds_write(archive_ctxt->dest_file, buffer, length)) {
-		return length;
-	}
-	return -1;
-}
-
-static
-int
-my_archive_close_callback(struct archive *a __attribute__((unused)),
-			  void *data __attribute__((unused)))
-{
-	return ARCHIVE_OK;
-}
-
-static
-ds_ctxt_t *
-archive_init(const char *root __attribute__((unused)))
-{
-	ds_ctxt_t		*ctxt;
-	ds_archive_ctxt_t	*archive_ctxt;
-	struct archive		*a;
-
-	ctxt = my_malloc(sizeof(ds_ctxt_t) + sizeof(ds_archive_ctxt_t),
-			 MYF(MY_FAE));
-	archive_ctxt = (ds_archive_ctxt_t *)(ctxt + 1);
-
-	if (pthread_mutex_init(&archive_ctxt->mutex, NULL)) {
-		msg("archive_init: pthread_mutex_init() failed.\n");
-		goto err;
-	}
-
-	a = archive_write_new();
-	if (a == NULL) {
-		msg("archive_write_new() failed.\n");
-		goto err;
-	}
-
-	archive_ctxt->archive = a;
-	archive_ctxt->dest_file = NULL;
-
-        if(archive_write_add_filter_none(a) != ARCHIVE_OK ||
-	    archive_write_set_format_pax_restricted(a) != ARCHIVE_OK ||
-	    /* disable internal buffering so we don't have to flush the
-	    output in xtrabackup */
-	    archive_write_set_bytes_per_block(a, 0) != ARCHIVE_OK) {
-		msg("failed to set libarchive archive options: %s\n",
-		    archive_error_string(a));
-                archive_write_free(a);
-		goto err;
-	}
-
-	if (archive_write_open(a, archive_ctxt, my_archive_open_callback,
-			       my_archive_write_callback,
-			       my_archive_close_callback) != ARCHIVE_OK) {
-		msg("cannot open output archive.\n");
-		return NULL;
-	}
-
-	ctxt->ptr = archive_ctxt;
-
-	return ctxt;
-
-err:
-	my_free(ctxt);
-	return NULL;
-}
-
-static
-ds_file_t *
-archive_open(ds_ctxt_t *ctxt, const char *path, MY_STAT *mystat)
-{
-	ds_archive_ctxt_t	*archive_ctxt;
-	ds_ctxt_t		*dest_ctxt;
-	ds_file_t		*file;
-	ds_archive_file_t	*archive_file;
-
-	struct archive		*a;
-	struct archive_entry	*entry;
-
-	xb_ad(ctxt->pipe_ctxt != NULL);
-	dest_ctxt = ctxt->pipe_ctxt;
-
-	archive_ctxt = (ds_archive_ctxt_t *) ctxt->ptr;
-
-	pthread_mutex_lock(&archive_ctxt->mutex);
-	if (archive_ctxt->dest_file == NULL) {
-		archive_ctxt->dest_file = ds_open(dest_ctxt, path, mystat);
-		if (archive_ctxt->dest_file == NULL) {
-			return NULL;
-		}
-	}
-	pthread_mutex_unlock(&archive_ctxt->mutex);
-
-	file = (ds_file_t *) my_malloc(sizeof(ds_file_t) +
-				       sizeof(ds_archive_file_t),
-				       MYF(MY_FAE));
-
-	archive_file = (ds_archive_file_t *) (file + 1);
-
-	a = archive_ctxt->archive;
-
-	entry = archive_entry_new();
-	if (entry == NULL) {
-		msg("archive_entry_new() failed.\n");
-		goto err;
-	}
-
-	archive_entry_set_size(entry, mystat->st_size);
-	archive_entry_set_mode(entry, 0660);
-	archive_entry_set_filetype(entry, AE_IFREG);
-	archive_entry_set_pathname(entry, path);
-	archive_entry_set_mtime(entry, mystat->st_mtime, 0);
-
-	archive_file->entry = entry;
-	archive_file->archive_ctxt = archive_ctxt;
-
-	if (archive_write_header(a, entry) != ARCHIVE_OK) {
-		msg("archive_write_header() failed.\n");
-		archive_entry_free(entry);
-		goto err;
-	}
-
-	file->ptr = archive_file;
-	file->path = archive_ctxt->dest_file->path;
-
-	return file;
-
-err:
-	if (archive_ctxt->dest_file) {
-		ds_close(archive_ctxt->dest_file);
-		archive_ctxt->dest_file = NULL;
-	}
-	my_free(file);
-
-	return NULL;
-}
-
-static
-int
-archive_write(ds_file_t *file, const void *buf, size_t len)
-{
-	ds_archive_file_t	*archive_file;
-	struct archive		*a;
-
-	archive_file = (ds_archive_file_t *) file->ptr;
-
-	a = archive_file->archive_ctxt->archive;
-
-	xb_ad(archive_file->archive_ctxt->dest_file != NULL);
-	if (archive_write_data(a, buf, len) < 0) {
-		msg("archive_write_data() failed: %s (errno = %d)\n",
-		    archive_error_string(a), archive_errno(a));
-		return 1;
-	}
-
-	return 0;
-}
-
-static
-int
-archive_close(ds_file_t *file)
-{
-	ds_archive_file_t	*archive_file;
-	int			rc = 0;
-
-	archive_file = (ds_archive_file_t *)file->ptr;
-
-	archive_entry_free(archive_file->entry);
-
-	my_free(file);
-
-	return rc;
-}
-
-static
-void
-archive_deinit(ds_ctxt_t *ctxt)
-{
-	struct archive *a;
-	ds_archive_ctxt_t	*archive_ctxt;
-
-	archive_ctxt = (ds_archive_ctxt_t *) ctxt->ptr;
-
-	a = archive_ctxt->archive;
-
-	if (archive_write_close(a) != ARCHIVE_OK) {
-		msg("archive_write_close() failed.\n");
-	}
-	archive_write_free(a);
-
-	if (archive_ctxt->dest_file) {
-		ds_close(archive_ctxt->dest_file);
-		archive_ctxt->dest_file = NULL;
-	}
-
-	pthread_mutex_destroy(&archive_ctxt->mutex);
-
-	my_free(ctxt);
-}
diff --git a/extra/mariabackup/ds_archive.h b/extra/mariabackup/ds_archive.h
deleted file mode 100644
index f419fca0c9f..00000000000
--- a/extra/mariabackup/ds_archive.h
+++ /dev/null
@@ -1,28 +0,0 @@
-/******************************************************
-Copyright (c) 2013 Percona LLC and/or its affiliates.
-
-Streaming interface for XtraBackup.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; version 2 of the License.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1335  USA
-
-*******************************************************/
-
-#ifndef DS_ARCHIVE_H
-#define DS_ARCHIVE_H
-
-#include "datasink.h"
-
-extern datasink_t datasink_archive;
-
-#endif
diff --git a/extra/mariabackup/ds_xbstream.cc b/extra/mariabackup/ds_xbstream.cc
index 4d165ad11d9..3bf8bd086c2 100644
--- a/extra/mariabackup/ds_xbstream.cc
+++ b/extra/mariabackup/ds_xbstream.cc
@@ -126,14 +126,20 @@ xbstream_open(ds_ctxt_t *ctxt, const char *path, MY_STAT *mystat)
 	pthread_mutex_lock(&stream_ctxt->mutex);
 	if (stream_ctxt->dest_file == NULL) {
 		stream_ctxt->dest_file = ds_open(dest_ctxt, path, mystat);
-		if (stream_ctxt->dest_file == NULL) {
-			return NULL;
-		}
 	}
 	pthread_mutex_unlock(&stream_ctxt->mutex);
+	if (stream_ctxt->dest_file == NULL) {
+		return NULL;
+	}
 
 	file = (ds_file_t *) my_malloc(PSI_NOT_INSTRUMENTED,
-                        sizeof(ds_file_t) + sizeof(ds_stream_file_t), MYF(MY_FAE));
+				       sizeof(ds_file_t) +
+				       sizeof(ds_stream_file_t),
+				       MYF(MY_FAE));
+	if (!file) {
+		msg("my_malloc() failed.");
+		goto err;
+	}
 	stream_file = (ds_stream_file_t *) (file + 1);
 
 	xbstream = stream_ctxt->xbstream;
diff --git a/libmysqld/libmysql.c b/libmysqld/libmysql.c
index 9a17b9b4f09..9a0858fd067 100644
--- a/libmysqld/libmysql.c
+++ b/libmysqld/libmysql.c
@@ -3954,6 +3954,7 @@ static my_bool is_binary_compatible(enum enum_field_types type1,
 
 static my_bool setup_one_fetch_function(MYSQL_BIND *param, MYSQL_FIELD *field)
 {
+  my_bool field_is_unsigned;
   DBUG_ENTER("setup_one_fetch_function");
 
   /* Setup data copy functions for the different supported types */
@@ -4030,6 +4031,7 @@ static my_bool setup_one_fetch_function(MYSQL_BIND *param, MYSQL_FIELD *field)
 
   /* Setup skip_result functions (to calculate max_length) */
   param->skip_result= skip_result_fixed;
+  field_is_unsigned= MY_TEST(field->flags & UNSIGNED_FLAG);
   switch (field->type) {
   case MYSQL_TYPE_NULL: /* for dummy binds */
     param->pack_length= 0;
@@ -4037,23 +4039,23 @@ static my_bool setup_one_fetch_function(MYSQL_BIND *param, MYSQL_FIELD *field)
     break;
   case MYSQL_TYPE_TINY:
     param->pack_length= 1;
-    field->max_length= 4;                     /* as in '-127' */
+    field->max_length= field_is_unsigned ? 3 : 4; /* '255' and '-127' */
     break;
   case MYSQL_TYPE_YEAR:
   case MYSQL_TYPE_SHORT:
     param->pack_length= 2;
-    field->max_length= 6;                     /* as in '-32767' */
+    field->max_length= field_is_unsigned ? 5 : 6; /* 65536 and '-32767' */
     break;
   case MYSQL_TYPE_INT24:
-    field->max_length= 9;  /* as in '16777216' or in '-8388607' */
+    field->max_length=  8;  /* '16777216' or in '-8388607' */
     param->pack_length= 4;
     break;
   case MYSQL_TYPE_LONG:
-    field->max_length= 11;                    /* '-2147483647' */
+    field->max_length= field_is_unsigned ? 10 : 11; /* '4294967295' and '-2147483647' */
     param->pack_length= 4;
     break;
   case MYSQL_TYPE_LONGLONG:
-    field->max_length= 21;                    /* '18446744073709551616' */
+    field->max_length= 20; /* '18446744073709551616' or -9223372036854775808 */
     param->pack_length= 8;
     break;
   case MYSQL_TYPE_FLOAT:
diff --git a/man/mysqldump.1 b/man/mysqldump.1
index b3f346ca085..e942b10cdc5 100644
--- a/man/mysqldump.1
+++ b/man/mysqldump.1
@@ -2277,7 +2277,7 @@ servers \- remote (federated) servers as \fBCREATE SERVER\fR\&.
 .sp -1
 .IP \(bu 2.3
 .\}
-stats \- statistics tables, InnoDB and Engine Independent Table Statistics (EITS), are dumped as \fBREPLACE INTO\fR (or \fBINSERT IGNORE\fR if \fB\-\-insert\-into\fR is specified) statements without (re)creating tables\&.
+stats \- statistics tables, InnoDB and Engine Independent Table Statistics (EITS), are dumped as \fBREPLACE INTO\fR (or \fBINSERT IGNORE\fR if \fB\-\-insert\-ignore\fR is specified) statements without (re)creating tables\&.
 .RE
 .RS 4
 .ie n \{\
@@ -2287,17 +2287,17 @@ stats \- statistics tables, InnoDB and Engine Independent Table Statistics (EITS
 .sp -1
 .IP \(bu 2.3
 .\}
-timezones \- timezone related system tables dumped as \fBREPLACE INTO\fR (or \fBINSERT IGNORE\fR if \fB\-\-insert\-into\fR is specified) statements without (re)creating tables\&.
+timezones \- timezone related system tables dumped as \fBREPLACE INTO\fR (or \fBINSERT IGNORE\fR if \fB\-\-insert\-ignore\fR is specified) statements without (re)creating tables\&.
 .RE
 .sp
-The format of the output is affected by \fB\-\-replace\fR and \fB\-\-insert\-into\fR\&. The \fB\-\-replace\fR option will output \fBCREATE OR REPLACE\fR
+The format of the output is affected by \fB\-\-replace\fR and \fB\-\-insert\-ignore\fR\&. The \fB\-\-replace\fR option will output \fBCREATE OR REPLACE\fR
 forms of SQL, and also \fBDROP IF EXISTS\fR prior to \fBCREATE\fR, if a \fBCREATE OR REPLACE\fR option isn't available.
 .sp
 With \fB\-\-system=user\fR (or \fBall\fR), and \fB\-\-replace\fR, SQL is generated to generate an error if attempting to import the dump with a connection user that is being replaced within the dump\&.
 .sp
-The \fB\-\-insert\-into\fR option will cause \fBCREATE IF NOT EXIST\fR forms of SQL to generated if available.
+The \fB\-\-insert\-ignore\fR option will cause \fBCREATE IF NOT EXIST\fR forms of SQL to generated if available.
 .sp
-For stats, and timezones, \fB\-\-replace\fR and \fB\-\-insert\-into\fR have the usual effects.
+For stats, and timezones, \fB\-\-replace\fR and \fB\-\-insert\-ignore\fR have the usual effects.
 .sp
 Enabling specific options here will cause the relevant tables in the mysql database to be ignored when dumping the mysql database or \fB\-\-all\-databases\fR\&.
 .sp
diff --git a/mysql-test/main/alias.result b/mysql-test/main/alias.result
index 0d14607f613..266991afbec 100644
--- a/mysql-test/main/alias.result
+++ b/mysql-test/main/alias.result
@@ -223,16 +223,16 @@ disconnect c1;
 #
 create or replace table t1 (a int);
 create or replace table t2 (b int);
-insert into t1 values(1<<30),(1<<29);
+insert into t1 values(111111111),(-2147483648);
 insert into t2 values(1),(2);
 select t1.a as a1 from t1 as t1,t2 order by t2.b,t1.a;
 Catalog	Database	Table	Table_alias	Column	Column_alias	Type	Length	Max length	Is_null	Flags	Decimals	Charsetnr
-def	test	t1	t1	a	a1	3	11	10	Y	32768	0	63
+def	test	t1	t1	a	a1	3	11	11	Y	32768	0	63
 a1
-536870912
-1073741824
-536870912
-1073741824
+-2147483648
+111111111
+-2147483648
+111111111
 drop table t1,t2;
 #
 # End of 10.4 tests
diff --git a/mysql-test/main/alias.test b/mysql-test/main/alias.test
index 2408509ba10..881cc34d6c6 100644
--- a/mysql-test/main/alias.test
+++ b/mysql-test/main/alias.test
@@ -231,7 +231,7 @@ disconnect c1;
 --echo #
 create or replace table t1 (a int);
 create or replace table t2 (b int);
-insert into t1 values(1<<30),(1<<29);
+insert into t1 values(111111111),(-2147483648);
 insert into t2 values(1),(2);
 --enable_metadata
 select t1.a as a1 from t1 as t1,t2 order by t2.b,t1.a;
diff --git a/mysql-test/main/mdev-504.result b/mysql-test/main/mdev-504.result
deleted file mode 100644
index e34e57be6ed..00000000000
--- a/mysql-test/main/mdev-504.result
+++ /dev/null
@@ -1,25 +0,0 @@
-set @save_use_stat_tables=@@global.use_stat_tables;
-SET GLOBAL net_write_timeout = 900;
-CREATE TABLE A (
-pk INTEGER AUTO_INCREMENT PRIMARY KEY,
-fdate DATE
-) ENGINE=MyISAM;
-CREATE PROCEDURE p_analyze()
-BEGIN
-DECLARE attempts INTEGER DEFAULT 100;
-wl_loop: WHILE attempts > 0 DO
-ANALYZE TABLE A;
-SET attempts = attempts - 1;
-END WHILE wl_loop;
-END |
-CREATE FUNCTION rnd3() RETURNS INT
-BEGIN
-RETURN ROUND(3 * RAND() + 0.5);
-END |
-SET GLOBAL use_stat_tables = PREFERABLY;
-connection default;
-DROP TABLE A;
-DROP PROCEDURE p_analyze;
-DROP FUNCTION rnd3;
-SET GLOBAL use_stat_tables = @save_use_stat_tables;
-SET GLOBAL net_write_timeout = DEFAULT;
diff --git a/mysql-test/main/mdev-504.test b/mysql-test/main/mdev-504.test
deleted file mode 100644
index 277b5a038a0..00000000000
--- a/mysql-test/main/mdev-504.test
+++ /dev/null
@@ -1,82 +0,0 @@
---source include/not_valgrind.inc
---source include/no_protocol.inc
-
-set @save_use_stat_tables=@@global.use_stat_tables;
-
-SET GLOBAL net_write_timeout = 900; 
-
-CREATE TABLE A (
-  pk INTEGER AUTO_INCREMENT PRIMARY KEY,
-  fdate DATE
-) ENGINE=MyISAM;
-
---delimiter |
-
-CREATE PROCEDURE p_analyze()
-BEGIN
-  DECLARE attempts INTEGER DEFAULT 100;
-  wl_loop: WHILE attempts > 0 DO
-    ANALYZE TABLE A;
-    SET attempts = attempts - 1;
-  END WHILE wl_loop;
-END |
-
-CREATE FUNCTION rnd3() RETURNS INT
-BEGIN
-  RETURN ROUND(3 * RAND() + 0.5);
-END |
-
---delimiter ;
-
-SET GLOBAL use_stat_tables = PREFERABLY;  
-
---let $trial = 100
-
---disable_query_log
---disable_result_log
---disable_warnings
-while ($trial)
-{
-
-  --connect (con1,localhost,root,,)
-  --send CALL p_analyze()
-
-  --connect (con2,localhost,root,,)
-  --send CALL p_analyze()
-
-  --let $run = 100
-
-  while ($run)
-  {
-    --connect (con3,localhost,root,,)
-  
-    let $query = `SELECT CASE rnd3() 
-      WHEN 1 THEN 'INSERT INTO A (pk) VALUES (NULL)'
-      WHEN 2 THEN 'DELETE FROM A LIMIT 1'
-      ELSE 'UPDATE IGNORE A SET fdate = 2 LIMIT 1' END`;
-    --eval $query
-    --disconnect con3
-    --dec $run
-  }
-
-  --connection con2
-  --reap
-  --disconnect con2
-  --connection con1
-  --reap
-  --disconnect con1
-
-  --dec $trial
-}
-
---enable_query_log
---enable_result_log
---enable_warnings
-
-# Cleanup
---connection default
-DROP TABLE A;
-DROP PROCEDURE p_analyze;
-DROP FUNCTION rnd3;
-SET GLOBAL use_stat_tables = @save_use_stat_tables;
-SET GLOBAL net_write_timeout = DEFAULT;
diff --git a/mysql-test/main/truncate_notembedded.result b/mysql-test/main/truncate_notembedded.result
index 18a01c684e7..67beb79707c 100644
--- a/mysql-test/main/truncate_notembedded.result
+++ b/mysql-test/main/truncate_notembedded.result
@@ -5,7 +5,7 @@
 CREATE TABLE t1 (a INT) ENGINE=MyISAM;
 LOCK TABLE t1 READ;
 connect  con1,localhost,root,,test;
-SET SESSION max_session_mem_used= 65536;
+SET SESSION max_session_mem_used= 45500;
 LOCK TABLE t1 WRITE;
 connection default;
 SELECT * FROM t1;
@@ -13,7 +13,6 @@ a
 UNLOCK TABLES;
 connection con1;
 TRUNCATE TABLE t1;
-ERROR HY000: The MariaDB server is running with the --max-thread-mem-used=65536 option so it cannot execute this statement
 disconnect con1;
 connection default;
 DROP TABLE t1;
diff --git a/mysql-test/main/truncate_notembedded.test b/mysql-test/main/truncate_notembedded.test
index 7e186c8f7d5..c1fab2d3609 100644
--- a/mysql-test/main/truncate_notembedded.test
+++ b/mysql-test/main/truncate_notembedded.test
@@ -9,7 +9,7 @@ CREATE TABLE t1 (a INT) ENGINE=MyISAM;
 LOCK TABLE t1 READ;
 
 --connect (con1,localhost,root,,test)
-SET SESSION max_session_mem_used= 65536;
+SET SESSION max_session_mem_used= 45500;
 --send
   LOCK TABLE t1 WRITE;
 
@@ -19,7 +19,10 @@ UNLOCK TABLES;
 
 --connection con1
 --reap
---error ER_OPTION_PREVENTS_STATEMENT
+# This may work or fail as different servers uses different amount of
+# memory and the statement may work or not. What is important is that we
+# don't get a crash here!
+--error 0,ER_OPTION_PREVENTS_STATEMENT
 TRUNCATE TABLE t1;
 
 --disconnect con1
diff --git a/mysql-test/suite/encryption/r/innodb_encryption.result b/mysql-test/suite/encryption/r/innodb_encryption.result
index 4ede82ebd38..3b1552be4be 100644
--- a/mysql-test/suite/encryption/r/innodb_encryption.result
+++ b/mysql-test/suite/encryption/r/innodb_encryption.result
@@ -19,7 +19,7 @@ innodb_system
 # Success!
 # Now turn off encryption and wait for threads to decrypt everything
 SET GLOBAL innodb_encrypt_tables = off;
-# Wait max 10 min for key encryption threads to encrypt all spaces
+# Wait max 10 min for key encryption threads to decrypt all spaces
 SELECT NAME FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION = 0
 AND NAME NOT LIKE 'innodb_undo%' AND NAME NOT LIKE 'mysql/innodb_%_stats' AND NAME NOT LIKE 'mysql/transaction_registry';
 NAME
diff --git a/mysql-test/suite/encryption/t/innodb_encryption.test b/mysql-test/suite/encryption/t/innodb_encryption.test
index 1c8d200458a..2b0b2b8d7fb 100644
--- a/mysql-test/suite/encryption/t/innodb_encryption.test
+++ b/mysql-test/suite/encryption/t/innodb_encryption.test
@@ -33,7 +33,7 @@ AND NAME NOT LIKE 'innodb_undo%' AND NAME NOT LIKE 'mysql/innodb_%_stats' AND NA
 --echo # Now turn off encryption and wait for threads to decrypt everything
 SET GLOBAL innodb_encrypt_tables = off;
 
---echo # Wait max 10 min for key encryption threads to encrypt all spaces
+--echo # Wait max 10 min for key encryption threads to decrypt all spaces
 --let $wait_timeout= 600
 --let $wait_condition=SELECT COUNT(*) = 0 FROM INFORMATION_SCHEMA.INNODB_TABLESPACES_ENCRYPTION WHERE MIN_KEY_VERSION <> 0;
 --source include/wait_condition.inc
diff --git a/mysql-test/suite/galera/r/galera_schema.result b/mysql-test/suite/galera/r/galera_schema.result
new file mode 100644
index 00000000000..24a4099c94d
--- /dev/null
+++ b/mysql-test/suite/galera/r/galera_schema.result
@@ -0,0 +1,114 @@
+connection node_2;
+connection node_1;
+CREATE TABLE IF NOT EXISTS wsrep_cluster
+(
+cluster_uuid CHAR(36) PRIMARY KEY,
+view_id BIGINT NOT NULL,
+view_seqno BIGINT NOT NULL,
+protocol_version INT NOT NULL,
+capabilities INT NOT NULL
+) ENGINE=InnoDB;
+CREATE TABLE IF NOT EXISTS wsrep_cluster_members
+(
+node_uuid CHAR(36) PRIMARY KEY,
+cluster_uuid CHAR(36) NOT NULL,
+node_name CHAR(32) NOT NULL,
+node_incoming_address VARCHAR(256) NOT NULL
+) ENGINE=InnoDB;
+CREATE TABLE IF NOT EXISTS wsrep_cluster_members_history
+(
+node_uuid CHAR(36) PRIMARY KEY,
+cluster_uuid CHAR(36) NOT NULL,
+last_view_id BIGINT NOT NULL,
+last_view_seqno BIGINT NOT NULL,
+node_name CHAR(32) NOT NULL,
+node_incoming_address VARCHAR(256) NOT NULL
+) ENGINE=InnoDB;
+CREATE TABLE IF NOT EXISTS wsrep_streaming_log
+(
+node_uuid CHAR(36),
+trx_id BIGINT,
+seqno BIGINT,
+flags INT NOT NULL,
+frag LONGBLOB NOT NULL,
+PRIMARY KEY (node_uuid, trx_id, seqno)
+) ENGINE=InnoDB;
+DELETE FROM wsrep_cluster;
+DELETE FROM wsrep_cluster_members;
+ALTER TABLE wsrep_cluster STATS_PERSISTENT=0;
+ALTER TABLE wsrep_cluster_members STATS_PERSISTENT=0;
+ALTER TABLE wsrep_cluster_members_history STATS_PERSISTENT=0;
+ALTER TABLE wsrep_streaming_log STATS_PERSISTENT=0;
+SHOW CREATE TABLE wsrep_cluster;
+Table	Create Table
+wsrep_cluster	CREATE TABLE `wsrep_cluster` (
+  `cluster_uuid` char(36) NOT NULL,
+  `view_id` bigint(20) NOT NULL,
+  `view_seqno` bigint(20) NOT NULL,
+  `protocol_version` int(11) NOT NULL,
+  `capabilities` int(11) NOT NULL,
+  PRIMARY KEY (`cluster_uuid`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 STATS_PERSISTENT=0
+SHOW CREATE TABLE wsrep_cluster_members;
+Table	Create Table
+wsrep_cluster_members	CREATE TABLE `wsrep_cluster_members` (
+  `node_uuid` char(36) NOT NULL,
+  `cluster_uuid` char(36) NOT NULL,
+  `node_name` char(32) NOT NULL,
+  `node_incoming_address` varchar(256) NOT NULL,
+  PRIMARY KEY (`node_uuid`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 STATS_PERSISTENT=0
+SHOW CREATE TABLE wsrep_cluster_members_history;
+Table	Create Table
+wsrep_cluster_members_history	CREATE TABLE `wsrep_cluster_members_history` (
+  `node_uuid` char(36) NOT NULL,
+  `cluster_uuid` char(36) NOT NULL,
+  `last_view_id` bigint(20) NOT NULL,
+  `last_view_seqno` bigint(20) NOT NULL,
+  `node_name` char(32) NOT NULL,
+  `node_incoming_address` varchar(256) NOT NULL,
+  PRIMARY KEY (`node_uuid`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 STATS_PERSISTENT=0
+SHOW CREATE TABLE wsrep_streaming_log;
+Table	Create Table
+wsrep_streaming_log	CREATE TABLE `wsrep_streaming_log` (
+  `node_uuid` char(36) NOT NULL,
+  `trx_id` bigint(20) NOT NULL,
+  `seqno` bigint(20) NOT NULL,
+  `flags` int(11) NOT NULL,
+  `frag` longblob NOT NULL,
+  PRIMARY KEY (`node_uuid`,`trx_id`,`seqno`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 STATS_PERSISTENT=0
+SHOW CREATE TABLE mysql.wsrep_cluster;
+Table	Create Table
+wsrep_cluster	CREATE TABLE `wsrep_cluster` (
+  `cluster_uuid` char(36) NOT NULL,
+  `view_id` bigint(20) NOT NULL,
+  `view_seqno` bigint(20) NOT NULL,
+  `protocol_version` int(11) NOT NULL,
+  `capabilities` int(11) NOT NULL,
+  PRIMARY KEY (`cluster_uuid`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 STATS_PERSISTENT=0
+SHOW CREATE TABLE mysql.wsrep_cluster_members;
+Table	Create Table
+wsrep_cluster_members	CREATE TABLE `wsrep_cluster_members` (
+  `node_uuid` char(36) NOT NULL,
+  `cluster_uuid` char(36) NOT NULL,
+  `node_name` char(32) NOT NULL,
+  `node_incoming_address` varchar(256) NOT NULL,
+  PRIMARY KEY (`node_uuid`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 STATS_PERSISTENT=0
+SHOW CREATE TABLE mysql.wsrep_streaming_log;
+Table	Create Table
+wsrep_streaming_log	CREATE TABLE `wsrep_streaming_log` (
+  `node_uuid` char(36) NOT NULL,
+  `trx_id` bigint(20) NOT NULL,
+  `seqno` bigint(20) NOT NULL,
+  `flags` int(11) NOT NULL,
+  `frag` longblob NOT NULL,
+  PRIMARY KEY (`node_uuid`,`trx_id`,`seqno`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 STATS_PERSISTENT=0
+DROP TABLE wsrep_cluster;
+DROP TABLE wsrep_cluster_members;
+DROP TABLE wsrep_cluster_members_history;
+DROP TABLE wsrep_streaming_log;
diff --git a/mysql-test/suite/galera/t/galera_schema.test b/mysql-test/suite/galera/t/galera_schema.test
new file mode 100644
index 00000000000..a3ee814c393
--- /dev/null
+++ b/mysql-test/suite/galera/t/galera_schema.test
@@ -0,0 +1,61 @@
+--source include/galera_cluster.inc
+
+CREATE TABLE IF NOT EXISTS wsrep_cluster
+(
+  cluster_uuid CHAR(36) PRIMARY KEY,
+  view_id BIGINT NOT NULL,
+  view_seqno BIGINT NOT NULL,
+  protocol_version INT NOT NULL,
+  capabilities INT NOT NULL
+) ENGINE=InnoDB;
+
+CREATE TABLE IF NOT EXISTS wsrep_cluster_members
+(
+  node_uuid CHAR(36) PRIMARY KEY,
+  cluster_uuid CHAR(36) NOT NULL,
+  node_name CHAR(32) NOT NULL,
+  node_incoming_address VARCHAR(256) NOT NULL
+) ENGINE=InnoDB;
+
+CREATE TABLE IF NOT EXISTS wsrep_cluster_members_history
+(
+  node_uuid CHAR(36) PRIMARY KEY,
+  cluster_uuid CHAR(36) NOT NULL,
+  last_view_id BIGINT NOT NULL,
+  last_view_seqno BIGINT NOT NULL,
+  node_name CHAR(32) NOT NULL,
+  node_incoming_address VARCHAR(256) NOT NULL
+) ENGINE=InnoDB;
+
+CREATE TABLE IF NOT EXISTS wsrep_streaming_log
+(
+  node_uuid CHAR(36),
+  trx_id BIGINT,
+  seqno BIGINT,
+  flags INT NOT NULL,
+  frag LONGBLOB NOT NULL,
+  PRIMARY KEY (node_uuid, trx_id, seqno)
+) ENGINE=InnoDB;
+
+DELETE FROM wsrep_cluster;
+DELETE FROM wsrep_cluster_members;
+
+ALTER TABLE wsrep_cluster STATS_PERSISTENT=0;
+ALTER TABLE wsrep_cluster_members STATS_PERSISTENT=0;
+ALTER TABLE wsrep_cluster_members_history STATS_PERSISTENT=0;
+ALTER TABLE wsrep_streaming_log STATS_PERSISTENT=0;
+
+SHOW CREATE TABLE wsrep_cluster;
+SHOW CREATE TABLE wsrep_cluster_members;
+SHOW CREATE TABLE wsrep_cluster_members_history;
+SHOW CREATE TABLE wsrep_streaming_log;
+
+SHOW CREATE TABLE mysql.wsrep_cluster;
+SHOW CREATE TABLE mysql.wsrep_cluster_members;
+#SHOW CREATE TABLE mysql.wsrep_cluster_members_history;
+SHOW CREATE TABLE mysql.wsrep_streaming_log;
+
+DROP TABLE wsrep_cluster;
+DROP TABLE wsrep_cluster_members;
+DROP TABLE wsrep_cluster_members_history;
+DROP TABLE wsrep_streaming_log;
diff --git a/mysql-test/suite/galera_3nodes/r/galera_wsrep_schema.result b/mysql-test/suite/galera_3nodes/r/galera_wsrep_schema.result
index ba01eab0e26..f51eb815cd5 100644
--- a/mysql-test/suite/galera_3nodes/r/galera_wsrep_schema.result
+++ b/mysql-test/suite/galera_3nodes/r/galera_wsrep_schema.result
@@ -14,7 +14,7 @@ wsrep_cluster	CREATE TABLE `wsrep_cluster` (
   `protocol_version` int(11) NOT NULL,
   `capabilities` int(11) NOT NULL,
   PRIMARY KEY (`cluster_uuid`)
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 STATS_PERSISTENT=0
 SHOW CREATE TABLE mysql.wsrep_cluster_members;
 Table	Create Table
 wsrep_cluster_members	CREATE TABLE `wsrep_cluster_members` (
@@ -23,7 +23,7 @@ wsrep_cluster_members	CREATE TABLE `wsrep_cluster_members` (
   `node_name` char(32) NOT NULL,
   `node_incoming_address` varchar(256) NOT NULL,
   PRIMARY KEY (`node_uuid`)
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 STATS_PERSISTENT=0
 SELECT COUNT(*) AS EXPECT_1 FROM mysql.wsrep_cluster;
 EXPECT_1
 1
diff --git a/mysql-test/suite/galera_3nodes/r/galera_wsrep_schema_init.result b/mysql-test/suite/galera_3nodes/r/galera_wsrep_schema_init.result
index 2a29afd62be..d9d3e817bed 100644
--- a/mysql-test/suite/galera_3nodes/r/galera_wsrep_schema_init.result
+++ b/mysql-test/suite/galera_3nodes/r/galera_wsrep_schema_init.result
@@ -14,7 +14,7 @@ wsrep_cluster	CREATE TABLE `wsrep_cluster` (
   `protocol_version` int(11) NOT NULL,
   `capabilities` int(11) NOT NULL,
   PRIMARY KEY (`cluster_uuid`)
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 STATS_PERSISTENT=0
 SHOW CREATE TABLE mysql.wsrep_cluster_members;
 Table	Create Table
 wsrep_cluster_members	CREATE TABLE `wsrep_cluster_members` (
@@ -23,7 +23,7 @@ wsrep_cluster_members	CREATE TABLE `wsrep_cluster_members` (
   `node_name` char(32) NOT NULL,
   `node_incoming_address` varchar(256) NOT NULL,
   PRIMARY KEY (`node_uuid`)
-) ENGINE=InnoDB DEFAULT CHARSET=latin1
+) ENGINE=InnoDB DEFAULT CHARSET=latin1 STATS_PERSISTENT=0
 SELECT @@sql_safe_updates;
 @@sql_safe_updates
 1
diff --git a/mysql-test/suite/galera_sr/r/GCF-627.result b/mysql-test/suite/galera_sr/r/GCF-627.result
index 65d8c95ad08..7cd2ab63ff3 100644
--- a/mysql-test/suite/galera_sr/r/GCF-627.result
+++ b/mysql-test/suite/galera_sr/r/GCF-627.result
@@ -2,7 +2,6 @@ connection node_2;
 connection node_1;
 connection node_1;
 CREATE TABLE t1 (f1 INTEGER, f2 VARCHAR(10)) ENGINE=InnoDB;
-CREATE TABLE t2 (f1 INTEGER);
 SET SESSION wsrep_trx_fragment_size = 1;
 SET AUTOCOMMIT=OFF;
 START TRANSACTION;
@@ -16,9 +15,10 @@ connect node_1a, 127.0.0.1, root, , test, $NODE_MYPORT_1;
 INSERT INTO t1 VALUES (2);
 ERROR 42S02: Table 'test.t1' doesn't exist
 connection node_1;
-SELECT * FROM mysql.wsrep_streaming_log;
-node_uuid	trx_id	seqno	flags	frag
+SELECT COUNT(*) FROM mysql.wsrep_streaming_log;
+COUNT(*)
+0
 connection node_2;
-SELECT * FROM mysql.wsrep_streaming_log;
-node_uuid	trx_id	seqno	flags	frag
-DROP TABLE t2;
+SELECT COUNT(*) FROM mysql.wsrep_streaming_log;
+COUNT(*)
+0
diff --git a/mysql-test/suite/galera_sr/t/GCF-627.test b/mysql-test/suite/galera_sr/t/GCF-627.test
index ad351eb9da6..6990c12314d 100644
--- a/mysql-test/suite/galera_sr/t/GCF-627.test
+++ b/mysql-test/suite/galera_sr/t/GCF-627.test
@@ -1,9 +1,7 @@
 --source include/galera_cluster.inc
---source include/have_innodb.inc
 
 --connection node_1
 CREATE TABLE t1 (f1 INTEGER, f2 VARCHAR(10)) ENGINE=InnoDB;
-CREATE TABLE t2 (f1 INTEGER);
 
 SET SESSION wsrep_trx_fragment_size = 1;
 SET AUTOCOMMIT=OFF;
@@ -25,11 +23,9 @@ INSERT INTO t1 VALUES (2);
 --let $wait_condition = SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log
 --source include/wait_condition.inc
 
-SELECT * FROM mysql.wsrep_streaming_log;
+SELECT COUNT(*) FROM mysql.wsrep_streaming_log;
 
 --connection node_2
 --let $wait_condition = SELECT COUNT(*) = 0 FROM mysql.wsrep_streaming_log
 --source include/wait_condition.inc
-SELECT * FROM mysql.wsrep_streaming_log;
-
-DROP TABLE t2;
+SELECT COUNT(*) FROM mysql.wsrep_streaming_log;
diff --git a/mysql-test/suite/innodb/r/innodb_defrag_stats.result b/mysql-test/suite/innodb/r/innodb_defrag_stats.result
index 598124e4ccb..b60f5f5c5a9 100644
--- a/mysql-test/suite/innodb/r/innodb_defrag_stats.result
+++ b/mysql-test/suite/innodb/r/innodb_defrag_stats.result
@@ -1,22 +1,8 @@
-DROP TABLE if exists t1;
-select @@global.innodb_stats_persistent;
-@@global.innodb_stats_persistent
-0
-set global innodb_defragment_stats_accuracy = 20;
+SET GLOBAL innodb_defragment_stats_accuracy = 20;
+DELETE FROM mysql.innodb_index_stats;
 # Create table.
 CREATE TABLE t1 (a INT NOT NULL PRIMARY KEY AUTO_INCREMENT, b VARCHAR(256), KEY SECOND(a, b)) ENGINE=INNODB;
-# Populate data
-INSERT INTO t1 VALUES(1, REPEAT('A', 256));
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
+INSERT INTO t1 SELECT seq, REPEAT('A', 256) FROM seq_1_to_1024;
 # Not enough page splits to trigger persistent stats write yet.
 select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_page_split');
 count(stat_value) = 0
@@ -27,7 +13,7 @@ count(stat_value) = 0
 select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_leaf_pages_defrag');
 count(stat_value) = 0
 1
-INSERT INTO t1 (b) SELECT b from t1;
+INSERT INTO t1 SELECT seq, REPEAT('A', 256) FROM seq_1025_to_2048;
 # Persistent stats recorded.
 select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_page_split');
 count(stat_value) > 0
@@ -39,6 +25,7 @@ select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like
 count(stat_value) > 0
 1
 # Delete some rows.
+BEGIN;
 delete from t1 where a between 100 * 20 and 100 * 20 + 30;
 delete from t1 where a between 100 * 19 and 100 * 19 + 30;
 delete from t1 where a between 100 * 18 and 100 * 18 + 30;
@@ -59,9 +46,7 @@ delete from t1 where a between 100 * 4 and 100 * 4 + 30;
 delete from t1 where a between 100 * 3 and 100 * 3 + 30;
 delete from t1 where a between 100 * 2 and 100 * 2 + 30;
 delete from t1 where a between 100 * 1 and 100 * 1 + 30;
-# restart
-# Server Restarted
-# Confirm persistent stats still there after restart.
+COMMIT;
 select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_page_split');
 count(stat_value) > 0
 1
@@ -74,9 +59,6 @@ count(stat_value) > 0
 optimize table t1;
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	status	OK
-select sleep(2);
-sleep(2)
-0
 select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_page_split');
 count(stat_value) > 0
 1
@@ -109,9 +91,6 @@ count(stat_value) > 0
 1
 # Table rename should cause stats rename.
 rename table t1 to t2;
-select sleep(1);
-sleep(1)
-0
 select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_page_split');
 count(stat_value) = 0
 1
@@ -130,48 +109,37 @@ count(stat_value) > 0
 select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_leaf_pages_defrag');
 count(stat_value) > 0
 1
-# Drop index should cause stats drop.
+# Drop index should cause stats drop, but will not.
 drop index SECOND on t2;
-select sleep(3);
-sleep(3)
-0
-select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and index_name = 'SECOND' and  stat_name in ('n_page_split');
-count(stat_value) > 0
-1
-select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and index_name = 'SECOND' and  stat_name in ('n_pages_freed');
-count(stat_value) > 0
-1
-select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and index_name = 'SECOND' and stat_name in ('n_leaf_pages_defrag');
-count(stat_value) > 0
-1
+SELECT stat_name, stat_value>0 FROM mysql.innodb_index_stats
+WHERE table_name like '%t2%' AND index_name='SECOND';
+stat_name	stat_value>0
+n_leaf_pages_defrag	1
+n_leaf_pages_reserved	1
+n_page_split	1
+n_pages_freed	1
+#
+# MDEV-26636: Statistics must not be written for temporary tables
+#
+SET GLOBAL innodb_defragment_stats_accuracy = 1;
+CREATE TEMPORARY TABLE t (a INT PRIMARY KEY, c CHAR(255) NOT NULL)
+ENGINE=InnoDB;
+INSERT INTO t SELECT seq, '' FROM seq_1_to_100;
 # restart
-Server Restarted
-select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_page_split');
-count(stat_value) = 0
-1
-select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_pages_freed');
-count(stat_value) = 0
-1
-select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_leaf_pages_defrag');
-count(stat_value) = 0
-1
-select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_page_split');
-count(stat_value) > 0
-1
-select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_pages_freed');
-count(stat_value) > 0
-1
-select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_leaf_pages_defrag');
-count(stat_value) > 0
-1
+SELECT * FROM mysql.innodb_index_stats where table_name like '%t1%';
+database_name	table_name	index_name	last_update	stat_name	stat_value	sample_size	stat_description
+SELECT table_name, index_name, stat_name, stat_value>0
+FROM mysql.innodb_index_stats;
+table_name	index_name	stat_name	stat_value>0
+t2	PRIMARY	n_leaf_pages_defrag	1
+t2	PRIMARY	n_leaf_pages_reserved	1
+t2	PRIMARY	n_page_split	1
+t2	PRIMARY	n_pages_freed	1
+t2	SECOND	n_leaf_pages_defrag	1
+t2	SECOND	n_leaf_pages_reserved	1
+t2	SECOND	n_page_split	1
+t2	SECOND	n_pages_freed	1
 # Clean up
 DROP TABLE t2;
-select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_page_split');
-count(stat_value) = 0
-1
-select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_pages_freed');
-count(stat_value) = 0
-1
-select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_leaf_pages_defrag');
-count(stat_value) = 0
-1
+SELECT * FROM mysql.innodb_index_stats;
+database_name	table_name	index_name	last_update	stat_name	stat_value	sample_size	stat_description
diff --git a/mysql-test/suite/innodb/t/innodb_defrag_stats.test b/mysql-test/suite/innodb/t/innodb_defrag_stats.test
index 2a5026a68e5..e1e88a07477 100644
--- a/mysql-test/suite/innodb/t/innodb_defrag_stats.test
+++ b/mysql-test/suite/innodb/t/innodb_defrag_stats.test
@@ -1,41 +1,23 @@
 --source include/have_innodb.inc
---source include/big_test.inc
 --source include/not_valgrind.inc
 --source include/not_embedded.inc
+--source include/have_sequence.inc
 
---disable_warnings
-DROP TABLE if exists t1;
---enable_warnings
+SET GLOBAL innodb_defragment_stats_accuracy = 20;
 
---disable_query_log
-let $innodb_defragment_stats_accuracy_orig=`select @@innodb_defragment_stats_accuracy`;
---enable_query_log
-
-select @@global.innodb_stats_persistent;
-set global innodb_defragment_stats_accuracy = 20;
+DELETE FROM mysql.innodb_index_stats;
 
 --echo # Create table.
 CREATE TABLE t1 (a INT NOT NULL PRIMARY KEY AUTO_INCREMENT, b VARCHAR(256), KEY SECOND(a, b)) ENGINE=INNODB;
 
---echo # Populate data
-INSERT INTO t1 VALUES(1, REPEAT('A', 256));
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
-INSERT INTO t1 (b) SELECT b from t1;
+INSERT INTO t1 SELECT seq, REPEAT('A', 256) FROM seq_1_to_1024;
 
 --echo # Not enough page splits to trigger persistent stats write yet.
 select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_page_split');
 select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_pages_freed');
 select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_leaf_pages_defrag');
 
-INSERT INTO t1 (b) SELECT b from t1;
+INSERT INTO t1 SELECT seq, REPEAT('A', 256) FROM seq_1025_to_2048;
 
 --echo # Persistent stats recorded.
 select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_page_split');
@@ -43,6 +25,7 @@ select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like
 select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_leaf_pages_defrag');
 
 --echo # Delete some rows.
+BEGIN;
 let $num_delete = 20;
 while ($num_delete)
 {
@@ -50,17 +33,13 @@ while ($num_delete)
     eval delete from t1 where a between $j and $j + 30;
     dec $num_delete;
 }
+COMMIT;
 
---source include/restart_mysqld.inc
---echo # Server Restarted
-
---echo # Confirm persistent stats still there after restart.
 select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_page_split');
 select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_pages_freed');
 select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_leaf_pages_defrag');
 
 optimize table t1;
-select sleep(2);
 
 select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_page_split');
 select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_pages_freed');
@@ -84,7 +63,6 @@ select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like
 
 --echo # Table rename should cause stats rename.
 rename table t1 to t2;
-select sleep(1);
 
 select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_page_split');
 select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_pages_freed');
@@ -94,32 +72,30 @@ select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like
 select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_pages_freed');
 select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_leaf_pages_defrag');
 
---echo # Drop index should cause stats drop.
+--echo # Drop index should cause stats drop, but will not.
 drop index SECOND on t2;
-select sleep(3);
 
-select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and index_name = 'SECOND' and  stat_name in ('n_page_split');
-select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and index_name = 'SECOND' and  stat_name in ('n_pages_freed');
-select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and index_name = 'SECOND' and stat_name in ('n_leaf_pages_defrag');
+--sorted_result
+SELECT stat_name, stat_value>0 FROM mysql.innodb_index_stats
+WHERE table_name like '%t2%' AND index_name='SECOND';
+
+--echo #
+--echo # MDEV-26636: Statistics must not be written for temporary tables
+--echo #
+SET GLOBAL innodb_defragment_stats_accuracy = 1;
+CREATE TEMPORARY TABLE t (a INT PRIMARY KEY, c CHAR(255) NOT NULL)
+ENGINE=InnoDB;
+INSERT INTO t SELECT seq, '' FROM seq_1_to_100;
 
 --source include/restart_mysqld.inc
---echo Server Restarted
 
-select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_page_split');
-select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_pages_freed');
-select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t1%' and  stat_name in ('n_leaf_pages_defrag');
+SELECT * FROM mysql.innodb_index_stats where table_name like '%t1%';
 
-select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_page_split');
-select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_pages_freed');
-select count(stat_value) > 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_leaf_pages_defrag');
+--sorted_result
+SELECT table_name, index_name, stat_name, stat_value>0
+FROM mysql.innodb_index_stats;
 
 --echo # Clean up
 DROP TABLE t2;
 
-select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_page_split');
-select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_pages_freed');
-select count(stat_value) = 0 from mysql.innodb_index_stats where table_name like '%t2%' and  stat_name in ('n_leaf_pages_defrag');
-
---disable_query_log
-EVAL SET GLOBAL innodb_defragment_stats_accuracy = $innodb_defragment_stats_accuracy_orig;
---enable_query_log
+SELECT * FROM mysql.innodb_index_stats;
diff --git a/scripts/wsrep_sst_mariabackup.sh b/scripts/wsrep_sst_mariabackup.sh
index 562b9b929f2..54632e5f79b 100644
--- a/scripts/wsrep_sst_mariabackup.sh
+++ b/scripts/wsrep_sst_mariabackup.sh
@@ -949,8 +949,10 @@ then
         tmpdir=$(parse_cnf "$encgroups" 'tmpdir')
         if [ -z "$tmpdir" ]; then
             xtmpdir="$(mktemp -d)"
-        else
+        elif [ "$OS" = 'Linux' ]; then
             xtmpdir=$(mktemp '-d' "--tmpdir=$tmpdir")
+        else
+            xtmpdir=$(TMPDIR="$tmpdir"; mktemp '-d')
         fi
 
         wsrep_log_info "Using '$xtmpdir' as mariabackup temporary directory"
diff --git a/scripts/wsrep_sst_rsync.sh b/scripts/wsrep_sst_rsync.sh
index d90e87b68f2..e16ed75cb16 100644
--- a/scripts/wsrep_sst_rsync.sh
+++ b/scripts/wsrep_sst_rsync.sh
@@ -725,8 +725,10 @@ EOF
             tmpdir=$(parse_cnf '--mysqld|sst' 'tmpdir')
             if [ -z "$tmpdir" ]; then
                tmpfile="$(mktemp)"
-            else
+            elif [ "$OS" = 'Linux' ]; then
                tmpfile=$(mktemp "--tmpdir=$tmpdir")
+            else
+               tmpfile=$(TMPDIR="$tmpdir"; mktemp '-d')
             fi
 
             wsrep_log_info "Extracting binlog files:"
diff --git a/sql/sql_delete.cc b/sql/sql_delete.cc
index 1966a77aa3e..7e053e60fdf 100644
--- a/sql/sql_delete.cc
+++ b/sql/sql_delete.cc
@@ -620,14 +620,18 @@ bool mysql_delete(THD *thd, TABLE_LIST *table_list, COND *conds,
     if (!table->check_virtual_columns_marked_for_read())
     {
       DBUG_PRINT("info", ("Trying direct delete"));
-      if (select && select->cond &&
-          (select->cond->used_tables() == table->map))
+      bool use_direct_delete= !select || !select->cond;
+      if (!use_direct_delete &&
+          (select->cond->used_tables() & ~RAND_TABLE_BIT) == table->map)
       {
         DBUG_ASSERT(!table->file->pushed_cond);
         if (!table->file->cond_push(select->cond))
+        {
+          use_direct_delete= TRUE;
           table->file->pushed_cond= select->cond;
+        }
       }
-      if (!table->file->direct_delete_rows_init())
+      if (use_direct_delete && !table->file->direct_delete_rows_init())
       {
         /* Direct deleting is supported */
         DBUG_PRINT("info", ("Using direct delete"));
diff --git a/sql/sql_update.cc b/sql/sql_update.cc
index 977e459f9df..624c183c83b 100644
--- a/sql/sql_update.cc
+++ b/sql/sql_update.cc
@@ -754,15 +754,20 @@ int mysql_update(THD *thd,
       !table->check_virtual_columns_marked_for_write())
   {
     DBUG_PRINT("info", ("Trying direct update"));
-    if (select && select->cond &&
-        (select->cond->used_tables() == table->map))
+    bool use_direct_update= !select || !select->cond;
+    if (!use_direct_update &&
+        (select->cond->used_tables() & ~RAND_TABLE_BIT) == table->map)
     {
       DBUG_ASSERT(!table->file->pushed_cond);
       if (!table->file->cond_push(select->cond))
+      {
+        use_direct_update= TRUE;
         table->file->pushed_cond= select->cond;
+      }
     }
 
-    if (!table->file->info_push(INFO_KIND_UPDATE_FIELDS, &fields) &&
+    if (use_direct_update &&
+        !table->file->info_push(INFO_KIND_UPDATE_FIELDS, &fields) &&
         !table->file->info_push(INFO_KIND_UPDATE_VALUES, &values) &&
         !table->file->direct_update_rows_init(&fields))
     {
diff --git a/sql/sql_yacc.yy b/sql/sql_yacc.yy
index d2fc4273f49..7d73bc97ea4 100644
--- a/sql/sql_yacc.yy
+++ b/sql/sql_yacc.yy
@@ -74,6 +74,9 @@
 /* warning C4065: switch statement contains 'default' but no 'case' labels */
 #pragma warning (disable : 4065)
 #endif
+#ifdef __GNUC__
+#pragma GCC diagnostic ignored "-Wunused-label" /* yyexhaustedlab: */
+#endif
 
 int yylex(void *yylval, void *yythd);
 
diff --git a/sql/wsrep_schema.cc b/sql/wsrep_schema.cc
index 0df1b527afe..252f41cb380 100644
--- a/sql/wsrep_schema.cc
+++ b/sql/wsrep_schema.cc
@@ -1,4 +1,4 @@
-/* Copyright (C) 2015-2019 Codership Oy <info@codership.com>
+/* Copyright (C) 2015-2021 Codership Oy <info@codership.com>
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -54,7 +54,7 @@ static const std::string create_cluster_table_str=
   "view_seqno BIGINT NOT NULL,"
   "protocol_version INT NOT NULL,"
   "capabilities INT NOT NULL"
-  ") ENGINE=InnoDB";
+  ") ENGINE=InnoDB STATS_PERSISTENT=0";
 
 static const std::string create_members_table_str=
   "CREATE TABLE IF NOT EXISTS " + wsrep_schema_str + "." + members_table_str +
@@ -63,7 +63,7 @@ static const std::string create_members_table_str=
   "cluster_uuid CHAR(36) NOT NULL,"
   "node_name CHAR(32) NOT NULL,"
   "node_incoming_address VARCHAR(256) NOT NULL"
-  ") ENGINE=InnoDB";
+  ") ENGINE=InnoDB STATS_PERSISTENT=0";
 
 #ifdef WSREP_SCHEMA_MEMBERS_HISTORY
 static const std::string cluster_member_history_table_str= "wsrep_cluster_member_history";
@@ -76,7 +76,7 @@ static const std::string create_members_history_table_str=
   "last_view_seqno BIGINT NOT NULL,"
   "node_name CHAR(32) NOT NULL,"
   "node_incoming_address VARCHAR(256) NOT NULL"
-  ") ENGINE=InnoDB";
+  ") ENGINE=InnoDB STATS_PERSISTENT=0";
 #endif /* WSREP_SCHEMA_MEMBERS_HISTORY */
 
 static const std::string create_frag_table_str=
@@ -88,7 +88,7 @@ static const std::string create_frag_table_str=
   "flags INT NOT NULL, "
   "frag LONGBLOB NOT NULL, "
   "PRIMARY KEY (node_uuid, trx_id, seqno)"
-  ") ENGINE=InnoDB";
+  ") ENGINE=InnoDB STATS_PERSISTENT=0";
 
 static const std::string delete_from_cluster_table=
   "DELETE FROM " + wsrep_schema_str + "." + cluster_table_str;
@@ -96,6 +96,26 @@ static const std::string delete_from_cluster_table=
 static const std::string delete_from_members_table=
   "DELETE FROM " + wsrep_schema_str + "." + members_table_str;
 
+/* For rolling upgrade we need to use ALTER. We do not want
+persistent statistics to be collected from these tables. */
+static const std::string alter_cluster_table=
+  "ALTER TABLE " + wsrep_schema_str + "." + cluster_table_str +
+  " STATS_PERSISTENT=0";
+
+static const std::string alter_members_table=
+  "ALTER TABLE " + wsrep_schema_str + "." + members_table_str +
+  " STATS_PERSISTENT=0";
+
+#ifdef WSREP_SCHEMA_MEMBERS_HISTORY
+static const std::string alter_members_history_table=
+  "ALTER TABLE " + wsrep_schema_str + "." + members_history_table_str +
+  " STATS_PERSISTENT=0";
+#endif
+
+static const std::string alter_frag_table=
+  "ALTER TABLE " + wsrep_schema_str + "." + sr_table_str +
+  " STATS_PERSISTENT=0";
+
 namespace Wsrep_schema_impl
 {
 
@@ -675,13 +695,27 @@ int Wsrep_schema::init()
       Wsrep_schema_impl::execute_SQL(thd,
                                      create_members_history_table_str.c_str(),
                                      create_members_history_table_str.size()) ||
+      Wsrep_schema_impl::execute_SQL(thd,
+                                     alter_members_history_table.c_str(),
+                                     alter_members_history_table.size()) ||
 #endif /* WSREP_SCHEMA_MEMBERS_HISTORY */
       Wsrep_schema_impl::execute_SQL(thd,
                                      create_frag_table_str.c_str(),
-                                     create_frag_table_str.size())) {
+                                     create_frag_table_str.size()) ||
+      Wsrep_schema_impl::execute_SQL(thd,
+                                     alter_cluster_table.c_str(),
+                                     alter_cluster_table.size()) ||
+      Wsrep_schema_impl::execute_SQL(thd,
+                                     alter_members_table.c_str(),
+                                     alter_members_table.size()) ||
+      Wsrep_schema_impl::execute_SQL(thd,
+                                     alter_frag_table.c_str(),
+	                             alter_frag_table.size()))
+  {
     ret= 1;
   }
-  else {
+  else
+  {
     ret= 0;
   }
 
diff --git a/storage/innobase/btr/btr0defragment.cc b/storage/innobase/btr/btr0defragment.cc
index d8c9cadb2b2..09454aeccc1 100644
--- a/storage/innobase/btr/btr0defragment.cc
+++ b/storage/innobase/btr/btr0defragment.cc
@@ -353,6 +353,7 @@ btr_defragment_save_defrag_stats_if_needed(
 {
 	if (srv_defragment_stats_accuracy != 0 // stats tracking disabled
 	    && index->table->space_id != 0 // do not track system tables
+	    && !index->table->is_temporary()
 	    && index->stat_defrag_modified_counter
 	       >= srv_defragment_stats_accuracy) {
 		dict_stats_defrag_pool_add(index);
diff --git a/storage/innobase/fsp/fsp0fsp.cc b/storage/innobase/fsp/fsp0fsp.cc
index a4f622a19ec..962d18d8081 100644
--- a/storage/innobase/fsp/fsp0fsp.cc
+++ b/storage/innobase/fsp/fsp0fsp.cc
@@ -1177,7 +1177,7 @@ fsp_alloc_free_page(
 		/* It must be that we are extending a single-table tablespace
 		whose size is still < 64 pages */
 
-		ut_a(!is_system_tablespace(space_id));
+		ut_a(!is_predefined_tablespace(space_id));
 		if (page_no >= FSP_EXTENT_SIZE) {
 			ib::error() << "Trying to extend a single-table"
 				" tablespace " << space->name << " , by single"
diff --git a/storage/innobase/row/row0ftsort.cc b/storage/innobase/row/row0ftsort.cc
index 5ec73d9677c..8513210d602 100644
--- a/storage/innobase/row/row0ftsort.cc
+++ b/storage/innobase/row/row0ftsort.cc
@@ -1635,7 +1635,6 @@ row_fts_merge_insert(
 	aux_table = dict_table_open_on_name(aux_table_name, FALSE, FALSE,
 					    DICT_ERR_IGNORE_NONE);
 	ut_ad(aux_table != NULL);
-	dict_table_close(aux_table, FALSE, FALSE);
 	aux_index = dict_table_get_first_index(aux_table);
 
 	ut_ad(!aux_index->is_instant());
@@ -1760,6 +1759,8 @@ row_fts_merge_insert(
 	}
 
 exit:
+	dict_table_close(aux_table, FALSE, FALSE);
+
 	fts_sql_commit(trx);
 
 	trx->op_info = "";
diff --git a/storage/spider/mysql-test/spider/r/udf_pushdown.result b/storage/spider/mysql-test/spider/r/udf_pushdown.result
new file mode 100644
index 00000000000..4ca734165e7
--- /dev/null
+++ b/storage/spider/mysql-test/spider/r/udf_pushdown.result
@@ -0,0 +1,218 @@
+for master_1
+for child2
+child2_1
+child2_2
+child2_3
+for child3
+child3_1
+child3_2
+child3_3
+#
+# MDEV-26545 Spider does not correctly handle UDF and stored function in where conds
+#
+
+##### enable general_log #####
+connection child2_1;
+SET @general_log_backup = @@global.general_log;
+SET @log_output_backup = @@global.log_output;
+SET @@global.general_log = 1;
+SET @@global.log_output = "TABLE";
+TRUNCATE TABLE mysql.general_log;
+
+##### create databases #####
+connection master_1;
+CREATE DATABASE auto_test_local;
+USE auto_test_local;
+connection child2_1;
+CREATE DATABASE auto_test_remote;
+USE auto_test_remote;
+
+##### create tables #####
+connection child2_1;
+CHILD_CREATE_TABLE
+connection master_1;
+MASTER_CREATE_TABLE
+CREATE TABLE ta_l (
+id INT NOT NULL,
+a INT,
+PRIMARY KEY(id)
+) MASTER_1_ENGINE MASTER_1_CHARSET MASTER_1_COMMENT_2_1
+INSERT INTO ta_l VALUES
+(1, 11),
+(2, 22),
+(3, 33),
+(4, 44),
+(5, 55);
+
+##### create functions #####
+connection master_1;
+CREATE FUNCTION `plusone`( param INT ) RETURNS INT
+BEGIN
+RETURN param + 1;
+END //
+connection child2_1;
+CREATE FUNCTION `plusone`( param INT ) RETURNS INT
+BEGIN
+RETURN param + 1;
+END //
+
+########## spider_use_pushdown_udf=0 ##########
+connection master_1;
+SET @@spider_use_pushdown_udf = 0;
+
+##### test SELECTs #####
+connection master_1;
+SELECT * FROM ta_l WHERE id = plusone(1);
+id	a
+2	22
+SELECT * FROM ta_l WHERE id IN (plusone(1), plusone(2)) AND a = plusone(32);
+id	a
+3	33
+connection child2_1;
+SELECT argument FROM mysql.general_log WHERE argument LIKE "%select%" AND argument NOT LIKE "%argument%";
+argument
+select `id`,`a` from `auto_test_remote`.`ta_r`
+select `id`,`a` from `auto_test_remote`.`ta_r`
+
+##### test UPDATEs #####
+connection master_1;
+UPDATE ta_l SET a = plusone(221) WHERE id = plusone(1);
+SELECT * FROM ta_l;
+id	a
+1	11
+2	222
+3	33
+4	44
+5	55
+UPDATE ta_l SET a = plusone(332) WHERE id IN (plusone(1), plusone(2)) AND a = plusone(32);
+SELECT * FROM ta_l;
+id	a
+1	11
+2	222
+3	333
+4	44
+5	55
+connection child2_1;
+SELECT argument FROM mysql.general_log WHERE argument LIKE "%update%" AND argument NOT LIKE "%argument%";
+argument
+select `id`,`a` from `auto_test_remote`.`ta_r` for update
+update `auto_test_remote`.`ta_r` set `a` = 222 where `id` = 2 limit 1
+select `id`,`a` from `auto_test_remote`.`ta_r` for update
+update `auto_test_remote`.`ta_r` set `a` = 333 where `id` = 3 and `a` = 33 limit 1
+
+##### test DELETEs #####
+connection master_1;
+DELETE FROM ta_l WHERE id = plusone(1);
+SELECT * FROM ta_l;
+id	a
+1	11
+3	333
+4	44
+5	55
+DELETE FROM ta_l WHERE id IN (plusone(1), plusone(2), plusone(3)) AND a = plusone(43);
+SELECT * FROM ta_l;
+id	a
+1	11
+3	333
+5	55
+connection child2_1;
+SELECT argument FROM mysql.general_log WHERE (argument LIKE "%delete%" OR argument LIKE "%update%") AND argument NOT LIKE "%argument%";
+argument
+select `id` from `auto_test_remote`.`ta_r` for update
+delete from `auto_test_remote`.`ta_r` where `id` = 2 limit 1
+select `id`,`a` from `auto_test_remote`.`ta_r` for update
+delete from `auto_test_remote`.`ta_r` where `id` = 4 and `a` = 44 limit 1
+
+##### reset records #####
+connection master_1;
+TRUNCATE TABLE ta_l;
+INSERT INTO ta_l VALUES
+(1, 11),
+(2, 22),
+(3, 33),
+(4, 44),
+(5, 55);
+
+########## spider_use_pushdown_udf=1 ##########
+connection master_1;
+SET @@spider_use_pushdown_udf = 1;
+
+##### test SELECTs #####
+connection master_1;
+SELECT * FROM ta_l WHERE id = plusone(1);
+id	a
+2	22
+SELECT * FROM ta_l WHERE id IN (plusone(1), plusone(2)) AND a = plusone(32);
+id	a
+3	33
+connection child2_1;
+SELECT argument FROM mysql.general_log WHERE argument LIKE "%select%" AND argument NOT LIKE "%argument%";
+argument
+select t0.`id` `id`,t0.`a` `a` from `auto_test_remote`.`ta_r` t0 where (t0.`id` = (`plusone`(1)))
+select t0.`id` `id`,t0.`a` `a` from `auto_test_remote`.`ta_r` t0 where ((t0.`id` in( (`plusone`(1)) , (`plusone`(2)))) and (t0.`a` = (`plusone`(32))))
+
+##### test UPDATEs #####
+connection master_1;
+UPDATE ta_l SET a = plusone(221) WHERE id = plusone(1);
+SELECT * FROM ta_l;
+id	a
+1	11
+2	222
+3	33
+4	44
+5	55
+UPDATE ta_l SET a = plusone(332) WHERE id IN (plusone(1), plusone(2)) AND a = plusone(32);
+SELECT * FROM ta_l;
+id	a
+1	11
+2	222
+3	333
+4	44
+5	55
+connection child2_1;
+SELECT argument FROM mysql.general_log WHERE argument LIKE "%update%" AND argument NOT LIKE "%argument%";
+argument
+update `auto_test_remote`.`ta_r` set `a` = (`plusone`(221)) where (`id` = (`plusone`(1)))
+update `auto_test_remote`.`ta_r` set `a` = (`plusone`(332)) where ((`id` in( (`plusone`(1)) , (`plusone`(2)))) and (`a` = (`plusone`(32))))
+
+##### test DELETEs #####
+connection master_1;
+DELETE FROM ta_l WHERE id = plusone(1);
+SELECT * FROM ta_l;
+id	a
+1	11
+3	333
+4	44
+5	55
+DELETE FROM ta_l WHERE id IN (plusone(1), plusone(2), plusone(3)) AND a = plusone(43);
+SELECT * FROM ta_l;
+id	a
+1	11
+3	333
+5	55
+connection child2_1;
+SELECT argument FROM mysql.general_log WHERE (argument LIKE "%delete%" OR argument LIKE "%update%") AND argument NOT LIKE "%argument%";
+argument
+delete from `auto_test_remote`.`ta_r` where (`id` = (`plusone`(1)))
+delete from `auto_test_remote`.`ta_r` where ((`id` in( (`plusone`(1)) , (`plusone`(2)) , (`plusone`(3)))) and (`a` = (`plusone`(43))))
+
+deinit
+connection master_1;
+DROP FUNCTION `plusone`;
+DROP DATABASE IF EXISTS auto_test_local;
+connection child2_1;
+SET @@global.general_log = @general_log_backup;
+SET @@global.log_output = @log_output_backup;
+DROP FUNCTION `plusone`;
+DROP DATABASE IF EXISTS auto_test_remote;
+for master_1
+for child2
+child2_1
+child2_2
+child2_3
+for child3
+child3_1
+child3_2
+child3_3
+
+end of test
diff --git a/storage/spider/mysql-test/spider/t/udf_pushdown.inc b/storage/spider/mysql-test/spider/t/udf_pushdown.inc
new file mode 100644
index 00000000000..160e8af21b2
--- /dev/null
+++ b/storage/spider/mysql-test/spider/t/udf_pushdown.inc
@@ -0,0 +1,48 @@
+--echo
+--echo ##### test SELECTs #####
+--connection master_1
+SELECT * FROM ta_l WHERE id = plusone(1);
+SELECT * FROM ta_l WHERE id IN (plusone(1), plusone(2)) AND a = plusone(32);
+
+if ($USE_CHILD_GROUP2)
+{
+  --connection child2_1
+  SELECT argument FROM mysql.general_log WHERE argument LIKE "%select%" AND argument NOT LIKE "%argument%";
+  --disable_query_log
+  TRUNCATE TABLE mysql.general_log;
+  --enable_query_log
+}
+
+--echo
+--echo ##### test UPDATEs #####
+--connection master_1
+UPDATE ta_l SET a = plusone(221) WHERE id = plusone(1);
+SELECT * FROM ta_l;
+UPDATE ta_l SET a = plusone(332) WHERE id IN (plusone(1), plusone(2)) AND a = plusone(32);
+SELECT * FROM ta_l;
+
+if ($USE_CHILD_GROUP2)
+{
+  --connection child2_1
+  SELECT argument FROM mysql.general_log WHERE argument LIKE "%update%" AND argument NOT LIKE "%argument%";
+  --disable_query_log
+  TRUNCATE TABLE mysql.general_log;
+  --enable_query_log
+}
+
+--echo
+--echo ##### test DELETEs #####
+--connection master_1
+DELETE FROM ta_l WHERE id = plusone(1);
+SELECT * FROM ta_l;
+DELETE FROM ta_l WHERE id IN (plusone(1), plusone(2), plusone(3)) AND a = plusone(43);
+SELECT * FROM ta_l;
+
+if ($USE_CHILD_GROUP2)
+{
+  --connection child2_1
+  SELECT argument FROM mysql.general_log WHERE (argument LIKE "%delete%" OR argument LIKE "%update%") AND argument NOT LIKE "%argument%";
+  --disable_query_log
+  TRUNCATE TABLE mysql.general_log;
+  --enable_query_log
+}
diff --git a/storage/spider/mysql-test/spider/t/udf_pushdown.test b/storage/spider/mysql-test/spider/t/udf_pushdown.test
new file mode 100644
index 00000000000..2eadbbbb40b
--- /dev/null
+++ b/storage/spider/mysql-test/spider/t/udf_pushdown.test
@@ -0,0 +1,141 @@
+--disable_warnings
+--disable_query_log
+--disable_result_log
+--source test_init.inc
+--enable_result_log
+--enable_query_log
+
+--echo #
+--echo # MDEV-26545 Spider does not correctly handle UDF and stored function in where conds
+--echo #
+
+let $CHILD_CREATE_TABLE=
+  CREATE TABLE ta_r (
+    id INT NOT NULL,
+    a INT,
+    PRIMARY KEY(id)
+  ) $CHILD2_1_ENGINE $CHILD2_1_CHARSET;
+
+let $MASTER_CREATE_TABLE_OUTPUT=
+  CREATE TABLE ta_l (
+    id INT NOT NULL,
+    a INT,
+    PRIMARY KEY(id)
+  ) MASTER_1_ENGINE MASTER_1_CHARSET MASTER_1_COMMENT_2_1;
+
+let $MASTER_CREATE_TABLE=
+  CREATE TABLE ta_l (
+    id INT NOT NULL,
+    a INT,
+    PRIMARY KEY(id)
+  ) $MASTER_1_ENGINE $MASTER_1_CHARSET $MASTER_1_COMMENT_2_1;
+
+--echo
+--echo ##### enable general_log #####
+--connection child2_1
+SET @general_log_backup = @@global.general_log;
+SET @log_output_backup = @@global.log_output;
+SET @@global.general_log = 1;
+SET @@global.log_output = "TABLE";
+TRUNCATE TABLE mysql.general_log;
+
+--echo
+--echo ##### create databases #####
+--connection master_1
+CREATE DATABASE auto_test_local;
+USE auto_test_local;
+if ($USE_CHILD_GROUP2)
+{
+  --connection child2_1
+  CREATE DATABASE auto_test_remote;
+  USE auto_test_remote;
+}
+
+--echo
+--echo ##### create tables #####
+if ($USE_CHILD_GROUP2)
+{
+  --connection child2_1
+  --disable_query_log
+  echo CHILD_CREATE_TABLE;
+  eval $CHILD_CREATE_TABLE;
+  --enable_query_log
+}
+
+--connection master_1
+--disable_query_log
+echo MASTER_CREATE_TABLE;
+echo $MASTER_CREATE_TABLE_OUTPUT;
+eval $MASTER_CREATE_TABLE;
+--enable_query_log
+
+INSERT INTO ta_l VALUES
+    (1, 11),
+    (2, 22),
+    (3, 33),
+    (4, 44),
+    (5, 55);
+
+--echo
+--echo ##### create functions #####
+--connection master_1
+DELIMITER //;
+CREATE FUNCTION `plusone`( param INT ) RETURNS INT
+BEGIN
+    RETURN param + 1;
+END //
+DELIMITER ;//
+
+--connection child2_1
+DELIMITER //;
+CREATE FUNCTION `plusone`( param INT ) RETURNS INT
+BEGIN
+    RETURN param + 1;
+END //
+DELIMITER ;//
+
+--echo
+--echo ########## spider_use_pushdown_udf=0 ##########
+--connection master_1
+SET @@spider_use_pushdown_udf = 0;
+--source udf_pushdown.inc
+
+--echo
+--echo ##### reset records #####
+--connection master_1
+TRUNCATE TABLE ta_l;
+INSERT INTO ta_l VALUES
+    (1, 11),
+    (2, 22),
+    (3, 33),
+    (4, 44),
+    (5, 55);
+
+--echo
+--echo ########## spider_use_pushdown_udf=1 ##########
+--connection master_1
+SET @@spider_use_pushdown_udf = 1;
+--source udf_pushdown.inc
+
+--echo
+--echo deinit
+--disable_warnings
+--connection master_1
+DROP FUNCTION `plusone`;
+DROP DATABASE IF EXISTS auto_test_local;
+if ($USE_CHILD_GROUP2)
+{
+  --connection child2_1
+  SET @@global.general_log = @general_log_backup;
+  SET @@global.log_output = @log_output_backup;
+  DROP FUNCTION `plusone`;
+  DROP DATABASE IF EXISTS auto_test_remote;
+}
+--disable_query_log
+--disable_result_log
+--source test_deinit.inc
+--enable_result_log
+--enable_query_log
+--enable_warnings
+--echo
+--echo end of test
diff --git a/storage/spider/spd_db_mysql.cc b/storage/spider/spd_db_mysql.cc
index 57e3893d09b..4c908ab3157 100644
--- a/storage/spider/spd_db_mysql.cc
+++ b/storage/spider/spd_db_mysql.cc
@@ -6658,11 +6658,17 @@ int spider_db_mbase_util::open_item_func(
         separator_str_length = SPIDER_SQL_AND_LEN;
       }
       break;
+    case Item_func::FUNC_SP:
     case Item_func::UDF_FUNC:
       use_pushdown_udf = spider_param_use_pushdown_udf(
         spider->wide_handler->trx->thd,
         spider->share->use_pushdown_udf);
       if (!use_pushdown_udf)
+        /*
+          This is the default behavior because the remote nodes may deal with
+          the function in an unexpected way (e.g. not having the same
+          definition). Users can turn it on if they know what they are doing.
+        */
         DBUG_RETURN(ER_SPIDER_COND_SKIP_NUM);
       if (str)
       {
diff --git a/storage/spider/spd_param.cc b/storage/spider/spd_param.cc
index ec0949b579f..b23877ca92a 100644
--- a/storage/spider/spd_param.cc
+++ b/storage/spider/spd_param.cc
@@ -2005,7 +2005,7 @@ static MYSQL_THDVAR_INT(
   "Remote server transmission existence when UDF is used at condition and \"engine_condition_pushdown=1\"", /* comment */
   NULL, /* check */
   NULL, /* update */
-  -1, /* def */
+  0, /* def */
   -1, /* min */
   1, /* max */
   0 /* blk */