fixed bugs

855485  ST_CROSSES returns different result than PostGIS for overlapping polygons
855487  ST_WITHIN returns wrong result for partially overlapping polygons
855492  ST_WITHIN returns TRUE on point on the edge of a polygon
855497  ST_ENVELOPE of GEOMETRYCOLLECTION EMPTY returns NULL and not GEOMETRYCOLLECTION EMPTY
855503  ST_EQUALS reports TRUE between a POLYGON and a MULTILINESTRING
855505  ST_TOUCHES reports TRUE for intersecting polygon and linestring

        Changed the way weird functions like Crosses or Touches treated.
        Added BORDER handling to the Gcalc_function.

per-file comments:
  mysql-test/r/gis-precise.result
        GIS bugs fixed.
        test result updated.
  mysql-test/t/gis-precise.test
        GIS bugs fixed.
        test cases added.
  sql/gcalc_slicescan.h
        GIS bugs fixed.
  sql/gcalc_tools.cc
        GIS bugs fixed.
  sql/gcalc_tools.h
        GIS bugs fixed.
  sql/item_create.cc
        GIS bugs fixed.
  sql/item_geofunc.cc
        GIS bugs fixed.
  sql/item_geofunc.h
        GIS bugs fixed.
  sql/spatial.cc
        GIS bugs fixed.

1 files changed, 6 insertions, 0 deletions

diff --git a/sql/spatial.cc b/sql/spatial.cc
index 15dc42441a8..d18600dd7de 100644
--- a/sql/spatial.cc
+++ b/sql/spatial.cc
@@ -2519,6 +2519,12 @@ int Gis_geometry_collection::store_shapes(Gcalc_shape_transporter *trn) const
   n_objects= uint4korr(data);
   data+= 4;
 
+  if (!n_objects)
+  {
+    trn->empty_shape();
+    return 0;
+  }
+
   if (trn->start_collection(n_objects))
     return 1;