Add inter-type regression tests for geometry, date/time, and numbers.

Add regression tests for circles, line segments, and paths.
Modify regression tests to allow GEQ optimizer (order results).

src/test/regress/sql/geometry.sql

@@ -0,0 +1,87 @@
+--
+-- Points
+--
+
+SELECT point(f1) FROM CIRCLE_TBL;
+
+SELECT '' AS two, p1.f1
+    FROM POINT_TBL p1
+    WHERE ishorizontal(p1.f1, '(0,0)'::point);
+
+SELECT '' AS one, p1.f1
+    FROM POINT_TBL p1
+    WHERE isvertical(p1.f1, '(5.1,34.5)'::point);
+
+--
+-- Line segments
+--
+
+--
+-- Lines
+--
+
+--
+-- Boxes
+--
+
+SELECT center(f1) FROM BOX_TBL;
+
+SELECT box(f1) FROM CIRCLE_TBL;
+
+-- translation
+SELECT '' AS count, b.f1 + p.f1
+    FROM BOX_TBL b, POINT_TBL p;
+
+-- scaling and rotation
+SELECT '' AS count, b.f1 * p.f1
+    FROM BOX_TBL b, POINT_TBL p;
+
+--
+-- Paths
+--
+
+SET geqo TO 'off';
+
+SELECT points(f1) AS npoints, f1 AS path FROM PATH_TBL;
+
+SELECT path(f1) FROM POLYGON_TBL;
+
+-- translation
+SELECT '' AS eight, p1.f1 + '(10,10)'::point AS dist_add
+    FROM PATH_TBL p1;
+
+-- scaling and rotation
+SELECT '' AS eight, p1.f1 * '(2,-1)'::point AS dist_mul
+    FROM PATH_TBL p1;
+
+RESET geqo;
+
+--
+-- Polygons
+--
+
+SELECT points(f1) AS npoints, f1 AS polygon FROM POLYGON_TBL;
+
+SELECT polygon(f1) FROM BOX_TBL;
+
+SELECT polygon(f1) FROM PATH_TBL WHERE isclosed(f1);
+
+SELECT f1 AS open_path, polygon( pclose(f1)) AS polygon FROM PATH_TBL WHERE isopen(f1);
+
+-- convert circles to polygons using the default number of points
+SELECT polygon(f1) FROM CIRCLE_TBL;
+
+-- convert the circle to an 8-point polygon
+SELECT polygon(8, f1) FROM CIRCLE_TBL;
+
+--
+-- Circles
+--
+
+SELECT circle( f1, 50.0) FROM POINT_TBL;
+
+SELECT '' AS twentyfour, c1.f1 AS circle, p1.f1 AS point, (p1.f1 <===> c1.f1) AS distance
+ from CIRCLE_TBL c1, POINT_TBL p1
+ WHERE (p1.f1 <===> c1.f1) > 0
+ ORDER BY distance, circle;
+