contrib/btree_gist/expected/float8.out - master - githubmirror/postgres

contrib/btree_gist/expected/float8.out
126 строк3 KB
Tom Lane
btree_gist: fix NaN handling in float4/float8 opclasses.
01 июл 2026, 20:27
01 июл 2026, 20:277d34489
-- float8 check
CREATE TABLE float8tmp (a float8);
\copy float8tmp from 'data/float8.data'
SET enable_seqscan=on;
SELECT count(*) FROM float8tmp WHERE a <  -1890.0;
 count 
-------
   238
(1 row)

SELECT count(*) FROM float8tmp WHERE a <= -1890.0;
 count 
-------
   239
(1 row)

SELECT count(*) FROM float8tmp WHERE a  = -1890.0;
 count 
-------
     1
(1 row)

SELECT count(*) FROM float8tmp WHERE a >= -1890.0;
 count 
-------
   309
(1 row)

SELECT count(*) FROM float8tmp WHERE a >  -1890.0;
 count 
-------
   308
(1 row)

SELECT a, a <-> '-1890.0' FROM float8tmp ORDER BY a <-> '-1890.0' LIMIT 3;
      a       |      ?column?      
--------------+--------------------
        -1890 |                  0
 -2003.634512 | 113.63451200000009
  -1769.73634 | 120.26366000000007
(3 rows)

CREATE INDEX float8idx ON float8tmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM float8tmp WHERE a <  -1890.0::float8;
 count 
-------
   238
(1 row)

SELECT count(*) FROM float8tmp WHERE a <= -1890.0::float8;
 count 
-------
   239
(1 row)

SELECT count(*) FROM float8tmp WHERE a  = -1890.0::float8;
 count 
-------
     1
(1 row)

SELECT count(*) FROM float8tmp WHERE a >= -1890.0::float8;
 count 
-------
   309
(1 row)

SELECT count(*) FROM float8tmp WHERE a >  -1890.0::float8;
 count 
-------
   308
(1 row)

EXPLAIN (COSTS OFF)
SELECT a, a <-> '-1890.0' FROM float8tmp ORDER BY a <-> '-1890.0' LIMIT 3;
                     QUERY PLAN                      
-----------------------------------------------------
 Limit
   ->  Index Only Scan using float8idx on float8tmp
         Order By: (a <-> '-1890'::double precision)
(3 rows)

SELECT a, a <-> '-1890.0' FROM float8tmp ORDER BY a <-> '-1890.0' LIMIT 3;
      a       |      ?column?      
--------------+--------------------
        -1890 |                  0
 -2003.634512 | 113.63451200000009
  -1769.73634 | 120.26366000000007
(3 rows)

-- EXCLUDE constraint must block a duplicate NaN, same as it does for finite
-- values.
CREATE TABLE float8excl (a float8, EXCLUDE USING gist (a WITH =));
INSERT INTO float8excl VALUES ('NaN'::float8);
INSERT INTO float8excl VALUES ('NaN'::float8);  -- expect: violates EXCLUDE
ERROR:  conflicting key value violates exclusion constraint "float8excl_a_excl"
DETAIL:  Key (a)=(NaN) conflicts with existing key (a)=(NaN).
SELECT count(*) FROM float8excl;
 count 
-------
     1
(1 row)

-- Test double-column index
CREATE INDEX float8idx2 ON float8tmp USING gist ( a, abs(a) );
EXPLAIN (COSTS OFF)
SELECT count(*) FROM float8tmp WHERE abs(a) = 1890.0::float8;
                          QUERY PLAN                           
---------------------------------------------------------------
 Aggregate
   ->  Bitmap Heap Scan on float8tmp
         Recheck Cond: (abs(a) = '1890'::double precision)
         ->  Bitmap Index Scan on float8idx2
               Index Cond: (abs(a) = '1890'::double precision)
(5 rows)

SELECT count(*) FROM float8tmp WHERE abs(a) = 1890.0::float8;
 count 
-------
     1
(1 row)

RESET enable_seqscan;
RESET enable_indexscan;
RESET enable_bitmapscan;