MDEV-13716 point_big test fails in 10.2.

        Implementation for the reverse spatial predicates was lost
        somehow.

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

@@ -56,6 +56,7 @@ INSERT INTO t1 VALUES("left3",  ST_GeomFromText('POLYGON (( -3 0, -3 2, -1 2, -1
 SET @p = ST_GeomFromText('POLYGON (( 0 0, 0 2, 2 2, 2 0, 0 0))');
 SELECT name, ST_AsText(square) from t1 where MBRContains(@p, square);
 name	ST_AsText(square)
+small	POLYGON((0 0,0 1,1 1,1 0,0 0))
 SELECT name, ST_AsText(square) from t1 where MBRDisjoint(@p, square);
 name	ST_AsText(square)
 up3	POLYGON((0 3,0 5,2 5,2 3,0 3))
@@ -90,6 +91,7 @@ down2	POLYGON((0 -2,0 0,2 0,2 -2,0 -2))
 left2	POLYGON((-2 0,-2 2,0 2,0 0,-2 0))
 SELECT name, ST_AsText(square) from t1 where MBRWithin(@p, square);
 name	ST_AsText(square)
+big	POLYGON((0 0,0 3,3 3,3 0,0 0))
 SET @vert1   = ST_GeomFromText('POLYGON ((0 -2, 0 2, 0 -2))');
 SET @horiz1  = ST_GeomFromText('POLYGON ((-2 0, 2 0, -2 0))');
 SET @horiz2 = ST_GeomFromText('POLYGON ((-1 0, 3 0, -1 0))');
@@ -217,7 +219,7 @@ SELECT COUNT(*)
 FROM t1
 WHERE ST_CONTAINS(ST_GeomFromText('POLYGON((2 2,4 2, 4 4, 2 4, 2 2))'),way);
 COUNT(*)
-0
+9
 OPTIMIZE TABLE t1;
 Table	Op	Msg_type	Msg_text
 test.t1	optimize	note	Table does not support optimize, doing recreate + analyze instead
@@ -226,7 +228,7 @@ SELECT COUNT(*)
 FROM t1
 WHERE ST_CONTAINS(ST_GeomFromText('POLYGON((2 2,4 2, 4 4, 2 4, 2 2))'),way);
 COUNT(*)
-0
+9
 DROP TABLE t1;
 CREATE TABLE t1( i INT, g GEOMETRY NOT NULL, SPATIAL INDEX (g)) ENGINE=InnoDB;
 INSERT INTO t1 VALUES(1, LINESTRING(POINT(1,1), POINT(4, 4)));

sql/item_geofunc.h

@@ -349,7 +349,18 @@ class Item_func_spatial_rel: public Item_bool_func2_with_rev
     maybe_null= true;
   }
   enum Functype functype() const { return spatial_rel; }
-  enum Functype rev_functype() const { return spatial_rel; }
+  enum Functype rev_functype() const
+  {
+    switch (spatial_rel)
+    {
+      case SP_CONTAINS_FUNC:
+        return SP_WITHIN_FUNC;
+      case SP_WITHIN_FUNC:
+        return SP_CONTAINS_FUNC;
+      default:
+        return spatial_rel;
+    }
+  }
   bool is_null() { (void) val_int(); return null_value; }
   void add_key_fields(JOIN *join, KEY_FIELD **key_fields,
                       uint *and_level, table_map usable_tables,