Changes between Version 17 and Version 18 of DevWikiEmptyGeometry

Timestamp:

Oct 6, 2009, 12:39:23 PM (15 years ago)

Author:

chodgson

Comment:

—

DevWikiEmptyGeometry

@@ -10 +10 @@
  * ST_Difference(empty, geometry) == empty
  * ST_Distance(geometry, empty) == NULL
- * ST_DWithin(geometry, empty, tolerance) == FALSE
+ * ST_DWithin(geometry, empty, tolerance) == FALSE (if distance = null, shouldn't DWithin be null?)
  * ST_Contains(geometry, empty) == FALSE
- * ??? ST_Contains(empty, empty) == FALSE
+ * ??? ST_Contains(empty, empty) == FALSE (SQL Server agrees with False)
  * ST_Intersects(geometry, empty) == FALSE
- * ??? ST_Intersects(empty, empty) == FALSE
- * ??? ST_Disjoint(empty, empty) == FALSE
- * ??? ST_Disjoint(geometry, empty) == FALSE
+ * ??? ST_Intersects(empty, empty) == FALSE (SQL Server agrees with False)
+ * ??? ST_Disjoint(empty, empty) == FALSE (SQL Server says true!)
+ * ??? ST_Disjoint(geometry, empty) == FALSE (SQL Server says true! - ie. everything is disjoint from empty)
  * ST_IsSimple(empty) == TRUE
  * ST_IsValid(empty) == TRUE