MDEV-28478: INSERT into SPATIAL INDEX in TEMPORARY table writes log

row_ins_sec_index_entry_low(): If a separate mini-transaction is
needed to adjust the minimum bounding rectangle (MBR) in the parent
page, we must disable redo logging if the table is a temporary table.
For temporary tables, no log is supposed to be written, because
the temporary tablespace will be reinitialized on server restart.

rtr_update_mbr_field(): Plug a memory leak.

mysql-test/suite/innodb_gis/r/rtree_split.result

@@ -61,10 +61,3 @@ select count(*) from t1 where MBRWithin(t1.c2, @g1);
 count(*)
 57344
 drop table t1;
-#
-# MDEV-27417 Spatial index tries to update
-#	change buffer bookkeeping page
-#
-CREATE TEMPORARY TABLE t1 (c POINT NOT NULL, SPATIAL(c)) ENGINE=InnoDB;
-INSERT INTO t1 SELECT PointFromText('POINT(0 0)') FROM seq_1_to_366;
-DROP TABLE t1;

mysql-test/suite/innodb_gis/r/rtree_temporary.result

+#
+# MDEV-27417 Spatial index tries to update
+#	change buffer bookkeeping page
+#
+CREATE TEMPORARY TABLE t1 (c POINT NOT NULL, SPATIAL(c)) ENGINE=InnoDB;
+INSERT INTO t1 SELECT PointFromText('POINT(0 0)') FROM seq_1_to_366;
+DROP TABLE t1;
+#
+# MDEV-28478 Assertion mtr->get_log_mode() == MTR_LOG_NO_REDO
+#
+CREATE TEMPORARY TABLE t1 (c POINT NOT NULL,SPATIAL (c)) ENGINE=InnoDB;
+INSERT INTO t1 SELECT POINT(0,0) FROM seq_1_to_366;
+INSERT INTO t1 VALUES (POINT(1e-270,1e-130));
+DROP TABLE t1;

mysql-test/suite/innodb_gis/t/rtree_split.test

@@ -72,11 +72,3 @@ select count(*) from t1 where MBRWithin(t1.c2, @g1);
 
 # Clean up.
 drop table t1;
-
---echo #
---echo # MDEV-27417 Spatial index tries to update
---echo #	change buffer bookkeeping page
---echo #
-CREATE TEMPORARY TABLE t1 (c POINT NOT NULL, SPATIAL(c)) ENGINE=InnoDB;
-INSERT INTO t1 SELECT PointFromText('POINT(0 0)') FROM seq_1_to_366;
-DROP TABLE t1;

mysql-test/suite/innodb_gis/t/rtree_temporary.test

+--source include/have_innodb.inc
+--source include/have_sequence.inc
+
+--echo #
+--echo # MDEV-27417 Spatial index tries to update
+--echo #	change buffer bookkeeping page
+--echo #
+CREATE TEMPORARY TABLE t1 (c POINT NOT NULL, SPATIAL(c)) ENGINE=InnoDB;
+INSERT INTO t1 SELECT PointFromText('POINT(0 0)') FROM seq_1_to_366;
+DROP TABLE t1;
+
+--echo #
+--echo # MDEV-28478 Assertion mtr->get_log_mode() == MTR_LOG_NO_REDO
+--echo #
+CREATE TEMPORARY TABLE t1 (c POINT NOT NULL,SPATIAL (c)) ENGINE=InnoDB;
+INSERT INTO t1 SELECT POINT(0,0) FROM seq_1_to_366;
+INSERT INTO t1 VALUES (POINT(1e-270,1e-130));
+DROP TABLE t1;

storage/innobase/gis/gis0rtree.cc

 /*****************************************************************************
 
 Copyright (c) 2016, Oracle and/or its affiliates. All Rights Reserved.
-Copyright (c) 2019, 2020, MariaDB Corporation.
+Copyright (c) 2019, 2022, MariaDB Corporation.
 
 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
@@ -376,6 +376,7 @@ rtr_update_mbr_field(
 
 		if (!rtr_update_mbr_field_in_place(index, rec,
 						   offsets, mbr, mtr)) {
+			mem_heap_free(heap);
 			return(false);
 		}
 

storage/innobase/row/row0ins.cc

 /*****************************************************************************
 
 Copyright (c) 1996, 2016, Oracle and/or its affiliates. All Rights Reserved.
-Copyright (c) 2016, 2021, MariaDB Corporation.
+Copyright (c) 2016, 2022, MariaDB Corporation.
 
 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
@@ -2900,8 +2900,12 @@ row_ins_sec_index_entry_low(
 			rtr_init_rtr_info(&rtr_info, false, &cursor,
 					  index, false);
 			rtr_info_update_btr(&cursor, &rtr_info);
-			mtr_start(&mtr);
+			mtr.start();
+			if (index->table->is_temporary()) {
+				mtr.set_log_mode(MTR_LOG_NO_REDO);
+			} else {
 				mtr.set_named_space(index->space);
+			}
 			search_mode &= ulint(~BTR_MODIFY_LEAF);
 			search_mode |= BTR_MODIFY_TREE;
 			err = btr_cur_search_to_nth_level(