From 8835d63b273486375b53d2b7686c55d88cbf456e Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Mon, 27 Jul 2009 00:26:03 +0000
Subject: [PATCH] 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.
---
src/test/regress/expected/create_index.out | 83 +++++++++++++++++++++-
src/test/regress/sql/create_index.sql | 21 +++++-
2 files changed, 98 insertions(+), 6 deletions(-)
diff --git a/src/test/regress/expected/create_index.out b/src/test/regress/expected/create_index.out
index e43ee6aa53d..7b37cbf40bc 100644
--- a/src/test/regress/expected/create_index.out
+++ b/src/test/regress/expected/create_index.out
@@ -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
-------
diff --git a/src/test/regress/sql/create_index.sql b/src/test/regress/sql/create_index.sql
index 9638b23312e..66ab0f9f02f 100644
--- a/src/test/regress/sql/create_index.sql
+++ b/src/test/regress/sql/create_index.sql
@@ -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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