bugs #801560 and #802194

tests added.

per-file comments:
  mysql-test/r/gis-precise.result
bugs #801560 and #802194
        test result updated.

  mysql-test/t/gis-precise.test
bugs #801560 and #802194
        test case added.

mysql-test/r/gis-precise.result

@@ -301,3 +301,19 @@ MultiPolygonFromText('MULTIPOLYGON(((9 9, 7 9, 1 1, 9 9)),
                                            ((0 0, 7 5, 9 6, 0 0)),
                                         
 POLYGON((0 0,0 5,1 5,2 7,2 5.5,5 7,5.5 7,7 9,9 9,7 7,7 5,9 6,7 4.66666666666667,7 1,4.25 2.83333333333333,3 2,3 0,0 0),(1 1,1 4,1.33333333333333 4,1.85714285714286 2.42857142857143,1 2,1.75 2,1 1,2 2,2 1.42857142857143,1.4 1,1 1),(1.5 1,2 1.33333333333333,2 1,1.5 1),(3 2.14285714285714,3 3,3.4 3.4,4.10344827586207 2.93103448275862,3 2.14285714285714))
+SELECT AsText( ST_INTERSECTION(
+LinestringFromText('LINESTRING( 3 5, 2 5, 2 4, 3 4, 3 5 ) ') ,
+LinestringFromText('LINESTRING( 3 5, 2 4, 2 5, 3 5 ) ')
+));
+AsText( ST_INTERSECTION(
+LinestringFromText('LINESTRING( 3 5, 2 5, 2 4, 3 4, 3 5 ) ') ,
+LinestringFromText('LINESTRING( 3 5, 2 4, 2 5, 3 5 ) ')
+))
+LINESTRING(2 4,2 5,3 5)
+SELECT AsText( ST_UNION(
+PolygonFromText(' POLYGON( ( 2 2 , 3 2 , 7 5 , 2 0 , 2 2 ) ) ') ,
+PolygonFromText(' POLYGON( ( 2 2 , 3 2 , 3 3 , 2 5 , 2 2 ) ) ') ) );
+AsText( ST_UNION(
+PolygonFromText(' POLYGON( ( 2 2 , 3 2 , 7 5 , 2 0 , 2 2 ) ) ') ,
+PolygonFromText(' POLYGON( ( 2 2 , 3 2 , 3 3 , 2 5 , 2 2 ) ) ') ) )
+POLYGON((2 0,2 5,3 3,3 2,7 5,2 0))

mysql-test/t/gis-precise.test

@@ -187,3 +187,17 @@ SELECT AsText(ST_UNION(
         MultiPolygonFromText('MULTIPOLYGON(((2 2, 2 2, 1 5, 2 7, 2 2)),
                                            ((0 5, 3 5, 3 0, 0 0, 0 5), (1 1, 2 1, 2 4, 1 4, 1 1)))')));
 
+#bug 802376 ST_INTERSECTION returns wrong result on two overlapping linestrings in maria-5.3-gis
+
+SELECT AsText( ST_INTERSECTION(
+  LinestringFromText('LINESTRING( 3 5, 2 5, 2 4, 3 4, 3 5 ) ') ,
+  LinestringFromText('LINESTRING( 3 5, 2 4, 2 5, 3 5 ) ')
+));
+
+#bug 801560 ST_UNION of adjacent polygons includes extra line in maria-5.3-gis
+
+SELECT AsText( ST_UNION(
+ PolygonFromText(' POLYGON( ( 2 2 , 3 2 , 7 5 , 2 0 , 2 2 ) ) ') ,
+ PolygonFromText(' POLYGON( ( 2 2 , 3 2 , 3 3 , 2 5 , 2 2 ) ) ') ) );
+
+