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Experiment with using EXPLAIN COSTS OFF in regression tests. 

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.
This commit is contained in:
Tom Lane 2009-07-27 00:26:03 +00:00
parent d4382c4ae7
commit 8835d63b27
2 changed files with 98 additions and 6 deletions
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83
src/test/regress/expected/create_index.out
View File

@ -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
View File

@ -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;