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|
-- enum check
create type rainbow as enum ('r','o','y','g','b','i','v');
CREATE TABLE enumtmp (a rainbow);
\copy enumtmp from 'data/enum.data'
SET enable_seqscan=on;
select a, count(*) from enumtmp group by a order by 1;
a | count
---+-------
r | 76
o | 78
y | 73
g | 75
b | 77
i | 78
v | 75
| 63
(8 rows)
SELECT count(*) FROM enumtmp WHERE a < 'g'::rainbow;
count
-------
227
(1 row)
SELECT count(*) FROM enumtmp WHERE a <= 'g'::rainbow;
count
-------
302
(1 row)
SELECT count(*) FROM enumtmp WHERE a = 'g'::rainbow;
count
-------
75
(1 row)
SELECT count(*) FROM enumtmp WHERE a >= 'g'::rainbow;
count
-------
305
(1 row)
SELECT count(*) FROM enumtmp WHERE a > 'g'::rainbow;
count
-------
230
(1 row)
CREATE INDEX enumidx ON enumtmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM enumtmp WHERE a < 'g'::rainbow;
count
-------
227
(1 row)
SELECT count(*) FROM enumtmp WHERE a <= 'g'::rainbow;
count
-------
302
(1 row)
SELECT count(*) FROM enumtmp WHERE a = 'g'::rainbow;
count
-------
75
(1 row)
SELECT count(*) FROM enumtmp WHERE a >= 'g'::rainbow;
count
-------
305
(1 row)
SELECT count(*) FROM enumtmp WHERE a > 'g'::rainbow;
count
-------
230
(1 row)
EXPLAIN (COSTS OFF)
SELECT count(*) FROM enumtmp WHERE a >= 'g'::rainbow;
QUERY PLAN
-----------------------------------------------
Aggregate
-> Bitmap Heap Scan on enumtmp
Recheck Cond: (a >= 'g'::rainbow)
-> Bitmap Index Scan on enumidx
Index Cond: (a >= 'g'::rainbow)
(5 rows)
|
