date.sql

来自「PostgreSQL 8.1.4的源码 适用于Linux下的开源数据库系统」· SQL 代码 · 共 33 行

-- date check

CREATE TABLE datetmp (a date);

\copy datetmp from 'data/date.data'

SET enable_seqscan=on;

SELECT count(*) FROM datetmp WHERE a <  '2001-02-13';

SELECT count(*) FROM datetmp WHERE a <= '2001-02-13';

SELECT count(*) FROM datetmp WHERE a  = '2001-02-13';

SELECT count(*) FROM datetmp WHERE a >= '2001-02-13';

SELECT count(*) FROM datetmp WHERE a >  '2001-02-13';

CREATE INDEX dateidx ON datetmp USING gist ( a );

SET enable_seqscan=off;

SELECT count(*) FROM datetmp WHERE a <  '2001-02-13'::date;

SELECT count(*) FROM datetmp WHERE a <= '2001-02-13'::date;

SELECT count(*) FROM datetmp WHERE a  = '2001-02-13'::date;

SELECT count(*) FROM datetmp WHERE a >= '2001-02-13'::date;

SELECT count(*) FROM datetmp WHERE a >  '2001-02-13'::date;