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Experiment with using EXPLAIN COSTS OFF in regression tests.

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This is a simple test to see whether COSTS OFF will help much with getting
EXPLAIN output that's sufficiently platform-independent for use in the
regression tests.  The planner does have some freedom of choice in these
examples (plain via bitmap indexscan), so I'm not sure what will happen.
REL8_5_ALPHA1_BRANCH
Tom Lane 16 years ago
parent d4382c4ae7
commit 8835d63b27
2 changed files with 98 additions and 6 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
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  1. 83
      src/test/regress/expected/create_index.out
  2. 21
      src/test/regress/sql/create_index.sql

83
src/test/regress/expected/create_index.out
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@ -113,9 +113,20 @@ SELECT count(*) FROM gcircle_tbl WHERE f1 && '<(500,500),500>'::circle;
SET enable_seqscan = OFF;
SET enable_indexscan = ON;
SET enable_bitmapscan = ON;
-- there's no easy way to check that these commands actually use
-- the index, unfortunately. (EXPLAIN would work, but its output
-- changes too often for me to want to put an EXPLAIN in the test...)
EXPLAIN (COSTS OFF)
SELECT * FROM fast_emp4000
WHERE home_base @ '(200,200),(2000,1000)'::box
ORDER BY (home_base[0])[0];
QUERY PLAN
----------------------------------------------------------------------
Sort
Sort Key: ((home_base[0])[0])
-> Bitmap Heap Scan on fast_emp4000
Recheck Cond: (home_base @ '(2000,1000),(200,200)'::box)
-> Bitmap Index Scan on grect2ind
Index Cond: (home_base @ '(2000,1000),(200,200)'::box)
(6 rows)
SELECT * FROM fast_emp4000
WHERE home_base @ '(200,200),(2000,1000)'::box
ORDER BY (home_base[0])[0];
@ -125,18 +136,51 @@ SELECT * FROM fast_emp4000
(1444,403),(1346,344)
(2 rows)
EXPLAIN (COSTS OFF)
SELECT count(*) FROM fast_emp4000 WHERE home_base && '(1000,1000,0,0)'::box;
QUERY PLAN
-------------------------------------------------------------------
Aggregate
-> Bitmap Heap Scan on fast_emp4000
Recheck Cond: (home_base && '(1000,1000),(0,0)'::box)
-> Bitmap Index Scan on grect2ind
Index Cond: (home_base && '(1000,1000),(0,0)'::box)
(5 rows)
SELECT count(*) FROM fast_emp4000 WHERE home_base && '(1000,1000,0,0)'::box;
count
-------
2
(1 row)
EXPLAIN (COSTS OFF)
SELECT count(*) FROM fast_emp4000 WHERE home_base IS NULL;
QUERY PLAN
-----------------------------------------------
Aggregate
-> Bitmap Heap Scan on fast_emp4000
Recheck Cond: (home_base IS NULL)
-> Bitmap Index Scan on grect2ind
Index Cond: (home_base IS NULL)
(5 rows)
SELECT count(*) FROM fast_emp4000 WHERE home_base IS NULL;
count
-------
278
(1 row)
EXPLAIN (COSTS OFF)
SELECT * FROM polygon_tbl WHERE f1 ~ '((1,1),(2,2),(2,1))'::polygon
ORDER BY (poly_center(f1))[0];
QUERY PLAN
-----------------------------------------------------------
Sort
Sort Key: ((poly_center(f1))[0])
-> Index Scan using gpolygonind on polygon_tbl
Index Cond: (f1 ~ '((1,1),(2,2),(2,1))'::polygon)
(4 rows)
SELECT * FROM polygon_tbl WHERE f1 ~ '((1,1),(2,2),(2,1))'::polygon
ORDER BY (poly_center(f1))[0];
f1
@ -144,6 +188,17 @@ SELECT * FROM polygon_tbl WHERE f1 ~ '((1,1),(2,2),(2,1))'::polygon
((2,0),(2,4),(0,0))
(1 row)
EXPLAIN (COSTS OFF)
SELECT * FROM circle_tbl WHERE f1 && circle(point(1,-2), 1)
ORDER BY area(f1);
QUERY PLAN
--------------------------------------------------
Sort
Sort Key: (area(f1))
-> Index Scan using gcircleind on circle_tbl
Index Cond: (f1 && '<(1,-2),1>'::circle)
(4 rows)
SELECT * FROM circle_tbl WHERE f1 && circle(point(1,-2), 1)
ORDER BY area(f1);
f1
@ -154,12 +209,34 @@ SELECT * FROM circle_tbl WHERE f1 && circle(point(1,-2), 1)
<(100,1),115>
(4 rows)
EXPLAIN (COSTS OFF)
SELECT count(*) FROM gpolygon_tbl WHERE f1 && '(1000,1000,0,0)'::polygon;
QUERY PLAN
------------------------------------------------------------------
Aggregate
-> Bitmap Heap Scan on gpolygon_tbl
Recheck Cond: (f1 && '((1000,1000),(0,0))'::polygon)
-> Bitmap Index Scan on ggpolygonind
Index Cond: (f1 && '((1000,1000),(0,0))'::polygon)
(5 rows)
SELECT count(*) FROM gpolygon_tbl WHERE f1 && '(1000,1000,0,0)'::polygon;
count
-------
2
(1 row)
EXPLAIN (COSTS OFF)
SELECT count(*) FROM gcircle_tbl WHERE f1 && '<(500,500),500>'::circle;
QUERY PLAN
-------------------------------------------------------------
Aggregate
-> Bitmap Heap Scan on gcircle_tbl
Recheck Cond: (f1 && '<(500,500),500>'::circle)
-> Bitmap Index Scan on ggcircleind
Index Cond: (f1 && '<(500,500),500>'::circle)
(5 rows)
SELECT count(*) FROM gcircle_tbl WHERE f1 && '<(500,500),500>'::circle;
count
-------

21
src/test/regress/sql/create_index.sql
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@ -112,25 +112,40 @@ SET enable_seqscan = OFF;
SET enable_indexscan = ON;
SET enable_bitmapscan = ON;
-- there's no easy way to check that these commands actually use
-- the index, unfortunately. (EXPLAIN would work, but its output
-- changes too often for me to want to put an EXPLAIN in the test...)
EXPLAIN (COSTS OFF)
SELECT * FROM fast_emp4000
WHERE home_base @ '(200,200),(2000,1000)'::box
ORDER BY (home_base[0])[0];
SELECT * FROM fast_emp4000
WHERE home_base @ '(200,200),(2000,1000)'::box
ORDER BY (home_base[0])[0];
EXPLAIN (COSTS OFF)
SELECT count(*) FROM fast_emp4000 WHERE home_base && '(1000,1000,0,0)'::box;
SELECT count(*) FROM fast_emp4000 WHERE home_base && '(1000,1000,0,0)'::box;
EXPLAIN (COSTS OFF)
SELECT count(*) FROM fast_emp4000 WHERE home_base IS NULL;
SELECT count(*) FROM fast_emp4000 WHERE home_base IS NULL;
EXPLAIN (COSTS OFF)
SELECT * FROM polygon_tbl WHERE f1 ~ '((1,1),(2,2),(2,1))'::polygon
ORDER BY (poly_center(f1))[0];
SELECT * FROM polygon_tbl WHERE f1 ~ '((1,1),(2,2),(2,1))'::polygon
ORDER BY (poly_center(f1))[0];
EXPLAIN (COSTS OFF)
SELECT * FROM circle_tbl WHERE f1 && circle(point(1,-2), 1)
ORDER BY area(f1);
SELECT * FROM circle_tbl WHERE f1 && circle(point(1,-2), 1)
ORDER BY area(f1);
EXPLAIN (COSTS OFF)
SELECT count(*) FROM gpolygon_tbl WHERE f1 && '(1000,1000,0,0)'::polygon;
SELECT count(*) FROM gpolygon_tbl WHERE f1 && '(1000,1000,0,0)'::polygon;
EXPLAIN (COSTS OFF)
SELECT count(*) FROM gcircle_tbl WHERE f1 && '<(500,500),500>'::circle;
SELECT count(*) FROM gcircle_tbl WHERE f1 && '<(500,500),500>'::circle;
RESET enable_seqscan;

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