time.out

PostgreSQL 8.1.4的源码 适用于Linux下的开源数据库系统

-- time check
CREATE TABLE timetmp (a time);
\copy timetmp from 'data/time.data'
SET enable_seqscan=on;
SELECT count(*) FROM timetmp WHERE a <  '10:57:11';
 count 
-------
   251
(1 row)

SELECT count(*) FROM timetmp WHERE a <= '10:57:11';
 count 
-------
   252
(1 row)

SELECT count(*) FROM timetmp WHERE a  = '10:57:11';
 count 
-------
     1
(1 row)

SELECT count(*) FROM timetmp WHERE a >= '10:57:11';
 count 
-------
   293
(1 row)

SELECT count(*) FROM timetmp WHERE a >  '10:57:11';
 count 
-------
   292
(1 row)

CREATE INDEX timeidx ON timetmp USING gist ( a );
SET enable_seqscan=off;
SELECT count(*) FROM timetmp WHERE a <  '10:57:11'::time;
 count 
-------
   251
(1 row)

SELECT count(*) FROM timetmp WHERE a <= '10:57:11'::time;
 count 
-------
   252
(1 row)

SELECT count(*) FROM timetmp WHERE a  = '10:57:11'::time;
 count 
-------
     1
(1 row)

SELECT count(*) FROM timetmp WHERE a >= '10:57:11'::time;
 count 
-------
   293
(1 row)

SELECT count(*) FROM timetmp WHERE a >  '10:57:11'::time;
 count 
-------
   292
(1 row)