int4.out

PostgreSQL 8.1.4的源码 适用于Linux下的开源数据库系统

-- int4 check
CREATE TABLE int4tmp (a int4);
\copy int4tmp from 'data/int2.data'
SET enable_seqscan=on;
SELECT count(*) FROM int4tmp WHERE a <  237;
 count 
-------
   297
(1 row)

SELECT count(*) FROM int4tmp WHERE a <= 237;
 count 
-------
   298
(1 row)

SELECT count(*) FROM int4tmp WHERE a  = 237;
 count 
-------
     1
(1 row)

SELECT count(*) FROM int4tmp WHERE a >= 237;
 count 
-------
   249
(1 row)

SELECT count(*) FROM int4tmp WHERE a >  237;
 count 
-------
   248
(1 row)

CREATE INDEX int4idx ON int4tmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM int4tmp WHERE a <  237::int4;
 count 
-------
   297
(1 row)

SELECT count(*) FROM int4tmp WHERE a <= 237::int4;
 count 
-------
   298
(1 row)

SELECT count(*) FROM int4tmp WHERE a  = 237::int4;
 count 
-------
     1
(1 row)

SELECT count(*) FROM int4tmp WHERE a >= 237::int4;
 count 
-------
   249
(1 row)

SELECT count(*) FROM int4tmp WHERE a >  237::int4;
 count 
-------
   248
(1 row)