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|
-- numeric check
CREATE TABLE numerictmp (a numeric);
\copy numerictmp from 'data/int8.data'
\copy numerictmp from 'data/numeric.data'
\copy numerictmp from 'data/float8.data'
SET enable_seqscan=on;
SELECT count(*) FROM numerictmp WHERE a < -1890.0;
count
-------
505
(1 row)
SELECT count(*) FROM numerictmp WHERE a <= -1890.0;
count
-------
506
(1 row)
SELECT count(*) FROM numerictmp WHERE a = -1890.0;
count
-------
1
(1 row)
SELECT count(*) FROM numerictmp WHERE a >= -1890.0;
count
-------
597
(1 row)
SELECT count(*) FROM numerictmp WHERE a > -1890.0;
count
-------
596
(1 row)
SELECT count(*) FROM numerictmp WHERE a < 'NaN' ;
count
-------
1100
(1 row)
SELECT count(*) FROM numerictmp WHERE a <= 'NaN' ;
count
-------
1102
(1 row)
SELECT count(*) FROM numerictmp WHERE a = 'NaN' ;
count
-------
2
(1 row)
SELECT count(*) FROM numerictmp WHERE a >= 'NaN' ;
count
-------
2
(1 row)
SELECT count(*) FROM numerictmp WHERE a > 'NaN' ;
count
-------
0
(1 row)
SELECT count(*) FROM numerictmp WHERE a < 0 ;
count
-------
523
(1 row)
SELECT count(*) FROM numerictmp WHERE a <= 0 ;
count
-------
526
(1 row)
SELECT count(*) FROM numerictmp WHERE a = 0 ;
count
-------
3
(1 row)
SELECT count(*) FROM numerictmp WHERE a >= 0 ;
count
-------
579
(1 row)
SELECT count(*) FROM numerictmp WHERE a > 0 ;
count
-------
576
(1 row)
CREATE INDEX numericidx ON numerictmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM numerictmp WHERE a < -1890.0;
count
-------
505
(1 row)
SELECT count(*) FROM numerictmp WHERE a <= -1890.0;
count
-------
506
(1 row)
SELECT count(*) FROM numerictmp WHERE a = -1890.0;
count
-------
1
(1 row)
SELECT count(*) FROM numerictmp WHERE a >= -1890.0;
count
-------
597
(1 row)
SELECT count(*) FROM numerictmp WHERE a > -1890.0;
count
-------
596
(1 row)
SELECT count(*) FROM numerictmp WHERE a < 'NaN' ;
count
-------
1100
(1 row)
SELECT count(*) FROM numerictmp WHERE a <= 'NaN' ;
count
-------
1102
(1 row)
SELECT count(*) FROM numerictmp WHERE a = 'NaN' ;
count
-------
2
(1 row)
SELECT count(*) FROM numerictmp WHERE a >= 'NaN' ;
count
-------
2
(1 row)
SELECT count(*) FROM numerictmp WHERE a > 'NaN' ;
count
-------
0
(1 row)
SELECT count(*) FROM numerictmp WHERE a < 0 ;
count
-------
523
(1 row)
SELECT count(*) FROM numerictmp WHERE a <= 0 ;
count
-------
526
(1 row)
SELECT count(*) FROM numerictmp WHERE a = 0 ;
count
-------
3
(1 row)
SELECT count(*) FROM numerictmp WHERE a >= 0 ;
count
-------
579
(1 row)
SELECT count(*) FROM numerictmp WHERE a > 0 ;
count
-------
576
(1 row)
-- Test index-only scans
SET enable_bitmapscan=off;
EXPLAIN (COSTS OFF)
SELECT * FROM numerictmp WHERE a BETWEEN 1 AND 300 ORDER BY a;
QUERY PLAN
---------------------------------------------------------------------
Sort
Sort Key: a
-> Index Only Scan using numericidx on numerictmp
Index Cond: ((a >= '1'::numeric) AND (a <= '300'::numeric))
(4 rows)
SELECT * FROM numerictmp WHERE a BETWEEN 1 AND 300 ORDER BY a;
a
------------
204.035430
207.400532
(2 rows)
|
