Adjust SP-GiST regression tests to be less locale-sensitive.

The original test cases gave varying results depending on whether the
locale sorts digits before or after letters.  Since that's not really
what we wish to test here, adjust the test data to not contain any strings
beginning with digits.  Per report from Pavel Stehule.

src/test/regress/expected/create_index.out

@@ -72,11 +72,11 @@ CREATE INDEX sp_quad_ind ON quad_point_tbl USING spgist (p);
 CREATE TABLE kd_point_tbl AS SELECT * FROM quad_point_tbl;
 CREATE INDEX sp_kd_ind ON kd_point_tbl USING spgist (p kd_point_ops);
 CREATE TABLE suffix_text_tbl AS
-    SELECT name AS t FROM road;
+    SELECT name AS t FROM road WHERE name !~ '^[0-9]';
 INSERT INTO suffix_text_tbl
-    SELECT '0123456789abcdef' FROM generate_series(1,1000);
-INSERT INTO suffix_text_tbl VALUES ('0123456789abcde');
-INSERT INTO suffix_text_tbl VALUES ('0123456789abcdefF');
+    SELECT 'P0123456789abcdef' FROM generate_series(1,1000);
+INSERT INTO suffix_text_tbl VALUES ('P0123456789abcde');
+INSERT INTO suffix_text_tbl VALUES ('P0123456789abcdefF');
 CREATE INDEX sp_suff_ind ON suffix_text_tbl USING spgist (t);
 --
 -- Test GiST and SP-GiST indexes
@@ -269,19 +269,19 @@ SELECT count(*) FROM quad_point_tbl WHERE p ~= '(4585, 365)';
      1
 (1 row)
 
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdef';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdef';
  count 
 -------
   1000
 (1 row)
 
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcde';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcde';
  count 
 -------
      1
 (1 row)
 
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdefF';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdefF';
  count 
 -------
      1
@@ -290,25 +290,25 @@ SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdefF';
 SELECT count(*) FROM suffix_text_tbl WHERE t <    'Aztec                         Ct  ';
  count 
 -------
-  1705
+   272
 (1 row)
 
 SELECT count(*) FROM suffix_text_tbl WHERE t ~<~  'Aztec                         Ct  ';
  count 
 -------
-  1705
+   272
 (1 row)
 
 SELECT count(*) FROM suffix_text_tbl WHERE t <=   'Aztec                         Ct  ';
  count 
 -------
-  1706
+   273
 (1 row)
 
 SELECT count(*) FROM suffix_text_tbl WHERE t ~<=~ 'Aztec                         Ct  ';
  count 
 -------
-  1706
+   273
 (1 row)
 
 SELECT count(*) FROM suffix_text_tbl WHERE t =    'Aztec                         Ct  ';
@@ -889,45 +889,45 @@ SELECT count(*) FROM kd_point_tbl WHERE p ~= '(4585, 365)';
 (1 row)
 
 EXPLAIN (COSTS OFF)
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdef';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdef';
                          QUERY PLAN                         
 ------------------------------------------------------------
  Aggregate
    ->  Index Only Scan using sp_suff_ind on suffix_text_tbl
-         Index Cond: (t = '0123456789abcdef'::text)
+         Index Cond: (t = 'P0123456789abcdef'::text)
 (3 rows)
 
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdef';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdef';
  count 
 -------
   1000
 (1 row)
 
 EXPLAIN (COSTS OFF)
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcde';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcde';
                          QUERY PLAN                         
 ------------------------------------------------------------
  Aggregate
    ->  Index Only Scan using sp_suff_ind on suffix_text_tbl
-         Index Cond: (t = '0123456789abcde'::text)
+         Index Cond: (t = 'P0123456789abcde'::text)
 (3 rows)
 
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcde';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcde';
  count 
 -------
      1
 (1 row)
 
 EXPLAIN (COSTS OFF)
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdefF';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdefF';
                          QUERY PLAN                         
 ------------------------------------------------------------
  Aggregate
    ->  Index Only Scan using sp_suff_ind on suffix_text_tbl
-         Index Cond: (t = '0123456789abcdefF'::text)
+         Index Cond: (t = 'P0123456789abcdefF'::text)
 (3 rows)
 
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdefF';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdefF';
  count 
 -------
      1
@@ -945,7 +945,7 @@ SELECT count(*) FROM suffix_text_tbl WHERE t <    'Aztec
 SELECT count(*) FROM suffix_text_tbl WHERE t <    'Aztec                         Ct  ';
  count 
 -------
-  1705
+   272
 (1 row)
 
 EXPLAIN (COSTS OFF)
@@ -960,7 +960,7 @@ SELECT count(*) FROM suffix_text_tbl WHERE t ~<~  'Aztec
 SELECT count(*) FROM suffix_text_tbl WHERE t ~<~  'Aztec                         Ct  ';
  count 
 -------
-  1705
+   272
 (1 row)
 
 EXPLAIN (COSTS OFF)
@@ -975,7 +975,7 @@ SELECT count(*) FROM suffix_text_tbl WHERE t <=   'Aztec
 SELECT count(*) FROM suffix_text_tbl WHERE t <=   'Aztec                         Ct  ';
  count 
 -------
-  1706
+   273
 (1 row)
 
 EXPLAIN (COSTS OFF)
@@ -990,7 +990,7 @@ SELECT count(*) FROM suffix_text_tbl WHERE t ~<=~ 'Aztec
 SELECT count(*) FROM suffix_text_tbl WHERE t ~<=~ 'Aztec                         Ct  ';
  count 
 -------
-  1706
+   273
 (1 row)
 
 EXPLAIN (COSTS OFF)
@@ -1347,51 +1347,51 @@ SELECT count(*) FROM kd_point_tbl WHERE p ~= '(4585, 365)';
 (1 row)
 
 EXPLAIN (COSTS OFF)
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdef';
-                        QUERY PLAN                        
-----------------------------------------------------------
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdef';
+                        QUERY PLAN                         
+-----------------------------------------------------------
  Aggregate
    ->  Bitmap Heap Scan on suffix_text_tbl
-         Recheck Cond: (t = '0123456789abcdef'::text)
+         Recheck Cond: (t = 'P0123456789abcdef'::text)
          ->  Bitmap Index Scan on sp_suff_ind
-               Index Cond: (t = '0123456789abcdef'::text)
+               Index Cond: (t = 'P0123456789abcdef'::text)
 (5 rows)
 
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdef';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdef';
  count 
 -------
   1000
 (1 row)
 
 EXPLAIN (COSTS OFF)
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcde';
-                       QUERY PLAN                        
----------------------------------------------------------
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcde';
+                        QUERY PLAN                        
+----------------------------------------------------------
  Aggregate
    ->  Bitmap Heap Scan on suffix_text_tbl
-         Recheck Cond: (t = '0123456789abcde'::text)
+         Recheck Cond: (t = 'P0123456789abcde'::text)
          ->  Bitmap Index Scan on sp_suff_ind
-               Index Cond: (t = '0123456789abcde'::text)
+               Index Cond: (t = 'P0123456789abcde'::text)
 (5 rows)
 
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcde';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcde';
  count 
 -------
      1
 (1 row)
 
 EXPLAIN (COSTS OFF)
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdefF';
-                        QUERY PLAN                         
------------------------------------------------------------
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdefF';
+                         QUERY PLAN                         
+------------------------------------------------------------
  Aggregate
    ->  Bitmap Heap Scan on suffix_text_tbl
-         Recheck Cond: (t = '0123456789abcdefF'::text)
+         Recheck Cond: (t = 'P0123456789abcdefF'::text)
          ->  Bitmap Index Scan on sp_suff_ind
-               Index Cond: (t = '0123456789abcdefF'::text)
+               Index Cond: (t = 'P0123456789abcdefF'::text)
 (5 rows)
 
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdefF';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdefF';
  count 
 -------
      1
@@ -1411,7 +1411,7 @@ SELECT count(*) FROM suffix_text_tbl WHERE t <    'Aztec
 SELECT count(*) FROM suffix_text_tbl WHERE t <    'Aztec                         Ct  ';
  count 
 -------
-  1705
+   272
 (1 row)
 
 EXPLAIN (COSTS OFF)
@@ -1428,7 +1428,7 @@ SELECT count(*) FROM suffix_text_tbl WHERE t ~<~  'Aztec
 SELECT count(*) FROM suffix_text_tbl WHERE t ~<~  'Aztec                         Ct  ';
  count 
 -------
-  1705
+   272
 (1 row)
 
 EXPLAIN (COSTS OFF)
@@ -1445,7 +1445,7 @@ SELECT count(*) FROM suffix_text_tbl WHERE t <=   'Aztec
 SELECT count(*) FROM suffix_text_tbl WHERE t <=   'Aztec                         Ct  ';
  count 
 -------
-  1706
+   273
 (1 row)
 
 EXPLAIN (COSTS OFF)
@@ -1462,7 +1462,7 @@ SELECT count(*) FROM suffix_text_tbl WHERE t ~<=~ 'Aztec
 SELECT count(*) FROM suffix_text_tbl WHERE t ~<=~ 'Aztec                         Ct  ';
  count 
 -------
-  1706
+   273
 (1 row)
 
 EXPLAIN (COSTS OFF)

src/test/regress/sql/create_index.sql

@@ -109,12 +109,12 @@ CREATE TABLE kd_point_tbl AS SELECT * FROM quad_point_tbl;
 CREATE INDEX sp_kd_ind ON kd_point_tbl USING spgist (p kd_point_ops);
 
 CREATE TABLE suffix_text_tbl AS
-    SELECT name AS t FROM road;
+    SELECT name AS t FROM road WHERE name !~ '^[0-9]';
 
 INSERT INTO suffix_text_tbl
-    SELECT '0123456789abcdef' FROM generate_series(1,1000);
-INSERT INTO suffix_text_tbl VALUES ('0123456789abcde');
-INSERT INTO suffix_text_tbl VALUES ('0123456789abcdefF');
+    SELECT 'P0123456789abcdef' FROM generate_series(1,1000);
+INSERT INTO suffix_text_tbl VALUES ('P0123456789abcde');
+INSERT INTO suffix_text_tbl VALUES ('P0123456789abcdefF');
 
 CREATE INDEX sp_suff_ind ON suffix_text_tbl USING spgist (t);
 
@@ -186,11 +186,11 @@ SELECT count(*) FROM quad_point_tbl WHERE p >^ '(5000, 4000)';
 
 SELECT count(*) FROM quad_point_tbl WHERE p ~= '(4585, 365)';
 
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdef';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdef';
 
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcde';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcde';
 
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdefF';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdefF';
 
 SELECT count(*) FROM suffix_text_tbl WHERE t <    'Aztec                         Ct  ';
 
@@ -362,16 +362,16 @@ SELECT count(*) FROM kd_point_tbl WHERE p ~= '(4585, 365)';
 SELECT count(*) FROM kd_point_tbl WHERE p ~= '(4585, 365)';
 
 EXPLAIN (COSTS OFF)
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdef';
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdef';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdef';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdef';
 
 EXPLAIN (COSTS OFF)
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcde';
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcde';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcde';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcde';
 
 EXPLAIN (COSTS OFF)
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdefF';
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdefF';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdefF';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdefF';
 
 EXPLAIN (COSTS OFF)
 SELECT count(*) FROM suffix_text_tbl WHERE t <    'Aztec                         Ct  ';
@@ -479,16 +479,16 @@ SELECT count(*) FROM kd_point_tbl WHERE p ~= '(4585, 365)';
 SELECT count(*) FROM kd_point_tbl WHERE p ~= '(4585, 365)';
 
 EXPLAIN (COSTS OFF)
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdef';
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdef';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdef';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdef';
 
 EXPLAIN (COSTS OFF)
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcde';
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcde';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcde';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcde';
 
 EXPLAIN (COSTS OFF)
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdefF';
-SELECT count(*) FROM suffix_text_tbl WHERE t = '0123456789abcdefF';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdefF';
+SELECT count(*) FROM suffix_text_tbl WHERE t = 'P0123456789abcdefF';
 
 EXPLAIN (COSTS OFF)
 SELECT count(*) FROM suffix_text_tbl WHERE t <    'Aztec                         Ct  ';