float8.out

来自「PostgreSQL 8.1.4的源码 适用于Linux下的开源数据库系统」· OUT 代码 · 共 67 行

-- 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 
-------
   237
(1 row)

SELECT count(*) FROM float8tmp WHERE a <= -1890.0;
 count 
-------
   238
(1 row)

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

SELECT count(*) FROM float8tmp WHERE a >= -1890.0;
 count 
-------
   307
(1 row)

SELECT count(*) FROM float8tmp WHERE a >  -1890.0;
 count 
-------
   306
(1 row)

CREATE INDEX float8idx ON float8tmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM float8tmp WHERE a <  -1890.0::float8;
 count 
-------
   237
(1 row)

SELECT count(*) FROM float8tmp WHERE a <= -1890.0::float8;
 count 
-------
   238
(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 
-------
   307
(1 row)

SELECT count(*) FROM float8tmp WHERE a >  -1890.0::float8;
 count 
-------
   306
(1 row)