float8.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 32 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;

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

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

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

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

CREATE INDEX float8idx ON float8tmp USING gist ( a );

SET enable_seqscan=off;

SELECT count(*) FROM float8tmp WHERE a <  -1890.0::float8;

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

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

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

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