CREATE TABLE tab(c1 int NOT NULL PRIMARY KEY,c2 POINT NOT NULL SRID 0);
CREATE SPATIAL INDEX idx1 on tab(c2);
INSERT INTO tab(c1,c2) VALUES(1,ST_GeomFromText('POINT(10 10)'));

# On connection 1
set transaction isolation level serializable ;
START TRANSACTION;
SELECT ST_AsText(c2) FROM tab WHERE MBRWithin(c2, ST_GeomFromText('POLYGON((5 5, 15 5, 15 15, 5 15, 5 5))'));
ST_AsText(c2)
POINT(10 10)

# On connection 2
start transaction;
INSERT INTO tab(c1,c2) VALUES(7, ST_GeomFromText('POINT(11 11)'));;

# On connection 3
include/start_transaction_high_prio.inc
START TRANSACTION /* HIGH PRIORITY */;
INSERT INTO tab(c1,c2) VALUES(8, ST_GeomFromText('POINT(10 10)'));
COMMIT;

# On connection 1
COMMIT;
ERROR HY000: Got error 149 - 'Lock deadlock; Retry transaction' during COMMIT
include/assert.inc ['There is a 8 in tab']
SELECT c1 FROM tab;
c1
1
8
DROP TABLE tab;