Remove duplicative polygon SP-GiST sequencing test.

Code coverage comparisons confirm that the tests using
quad_poly_tbl_ord_seq1/quad_poly_tbl_ord_idx1 hit no code
paths not also covered by the similar tests using
quad_poly_tbl_ord_seq2/quad_poly_tbl_ord_idx2.  Since these
test cases are pretty expensive, they need to contribute more
than zero benefit.

In passing, make quad_poly_tbl_ord_seq2 a temp table, since
there seems little reason to keep it around after the test.

Discussion: https://postgr.es/m/735.1554935715@sss.pgh.pa.us

src/test/regress/expected/polygon.out

@@ -66,10 +66,7 @@ CREATE INDEX quad_poly_tbl_idx ON quad_poly_tbl USING spgist(p);
 SET enable_seqscan = ON;
 SET enable_indexscan = OFF;
 SET enable_bitmapscan = OFF;
-CREATE TABLE quad_poly_tbl_ord_seq1 AS
+CREATE TEMP TABLE quad_poly_tbl_ord_seq2 AS
-SELECT rank() OVER (ORDER BY p <-> point '123,456') n, p <-> point '123,456' dist, id
-FROM quad_poly_tbl;
-CREATE TABLE quad_poly_tbl_ord_seq2 AS
 SELECT rank() OVER (ORDER BY p <-> point '123,456') n, p <-> point '123,456' dist, id
 FROM quad_poly_tbl WHERE p <@ polygon '((300,300),(400,600),(600,500),(700,200))';
 -- check results results from index scan
@@ -283,28 +280,6 @@ SELECT count(*) FROM quad_poly_tbl WHERE p ~= polygon '((200, 300),(210, 310),(2
 -- test ORDER BY distance
 SET enable_indexscan = ON;
 SET enable_bitmapscan = OFF;
-EXPLAIN (COSTS OFF)
-SELECT rank() OVER (ORDER BY p <-> point '123,456') n, p <-> point '123,456' dist, id
-FROM quad_poly_tbl;
-                        QUERY PLAN                         
------------------------------------------------------------
- WindowAgg
-   ->  Index Scan using quad_poly_tbl_idx on quad_poly_tbl
-         Order By: (p <-> '(123,456)'::point)
-(3 rows)
-
-CREATE TEMP TABLE quad_poly_tbl_ord_idx1 AS
-SELECT rank() OVER (ORDER BY p <-> point '123,456') n, p <-> point '123,456' dist, id
-FROM quad_poly_tbl;
-SELECT *
-FROM quad_poly_tbl_ord_seq1 seq FULL JOIN quad_poly_tbl_ord_idx1 idx
-	ON seq.n = idx.n AND seq.id = idx.id AND
-		(seq.dist = idx.dist OR seq.dist IS NULL AND idx.dist IS NULL)
-WHERE seq.id IS NULL OR idx.id IS NULL;
- n | dist | id | n | dist | id 
----+------+----+---+------+----
-(0 rows)
-
 EXPLAIN (COSTS OFF)
 SELECT rank() OVER (ORDER BY p <-> point '123,456') n, p <-> point '123,456' dist, id
 FROM quad_poly_tbl WHERE p <@ polygon '((300,300),(400,600),(600,500),(700,200))';

src/test/regress/expected/sanity_check.out

@@ -167,8 +167,6 @@ polygon_tbl|t
 quad_box_tbl|t
 quad_point_tbl|t
 quad_poly_tbl|t
-quad_poly_tbl_ord_seq1|f
-quad_poly_tbl_ord_seq2|f
 radix_text_tbl|t
 ramp|f
 real_city|f

src/test/regress/sql/polygon.sql

@@ -62,11 +62,7 @@ SET enable_seqscan = ON;
 SET enable_indexscan = OFF;
 SET enable_bitmapscan = OFF;
 
-CREATE TABLE quad_poly_tbl_ord_seq1 AS
+CREATE TEMP TABLE quad_poly_tbl_ord_seq2 AS
-SELECT rank() OVER (ORDER BY p <-> point '123,456') n, p <-> point '123,456' dist, id
-FROM quad_poly_tbl;
-
-CREATE TABLE quad_poly_tbl_ord_seq2 AS
 SELECT rank() OVER (ORDER BY p <-> point '123,456') n, p <-> point '123,456' dist, id
 FROM quad_poly_tbl WHERE p <@ polygon '((300,300),(400,600),(600,500),(700,200))';
 
@@ -127,21 +123,6 @@ SELECT count(*) FROM quad_poly_tbl WHERE p ~= polygon '((200, 300),(210, 310),(2
 SET enable_indexscan = ON;
 SET enable_bitmapscan = OFF;
 
-EXPLAIN (COSTS OFF)
-SELECT rank() OVER (ORDER BY p <-> point '123,456') n, p <-> point '123,456' dist, id
-FROM quad_poly_tbl;
-
-CREATE TEMP TABLE quad_poly_tbl_ord_idx1 AS
-SELECT rank() OVER (ORDER BY p <-> point '123,456') n, p <-> point '123,456' dist, id
-FROM quad_poly_tbl;
-
-SELECT *
-FROM quad_poly_tbl_ord_seq1 seq FULL JOIN quad_poly_tbl_ord_idx1 idx
-	ON seq.n = idx.n AND seq.id = idx.id AND
-		(seq.dist = idx.dist OR seq.dist IS NULL AND idx.dist IS NULL)
-WHERE seq.id IS NULL OR idx.id IS NULL;
-
-
 EXPLAIN (COSTS OFF)
 SELECT rank() OVER (ORDER BY p <-> point '123,456') n, p <-> point '123,456' dist, id
 FROM quad_poly_tbl WHERE p <@ polygon '((300,300),(400,600),(600,500),(700,200))';