varbit.out

PostgreSQL 8.1.4的源码 适用于Linux下的开源数据库系统

-- varbit check
CREATE TABLE varbittmp (a varbit);
\copy varbittmp from 'data/varbit.data'
SET enable_seqscan=on;
SELECT count(*) FROM varbittmp WHERE a <   '1110100111010';
 count 
-------
   549
(1 row)

SELECT count(*) FROM varbittmp WHERE a <=  '1110100111010';
 count 
-------
   550
(1 row)

SELECT count(*) FROM varbittmp WHERE a  =  '1110100111010';
 count 
-------
     1
(1 row)

SELECT count(*) FROM varbittmp WHERE a >=  '1110100111010';
 count 
-------
    51
(1 row)

SELECT count(*) FROM varbittmp WHERE a >   '1110100111010';
 count 
-------
    50
(1 row)

CREATE INDEX varbitidx ON varbittmp USING GIST ( a );
SET enable_seqscan=off;
SELECT count(*) FROM varbittmp WHERE a <   '1110100111010'::varbit;
 count 
-------
   549
(1 row)

SELECT count(*) FROM varbittmp WHERE a <=  '1110100111010'::varbit;
 count 
-------
   550
(1 row)

SELECT count(*) FROM varbittmp WHERE a  =  '1110100111010'::varbit;
 count 
-------
     1
(1 row)

SELECT count(*) FROM varbittmp WHERE a >=  '1110100111010'::varbit;
 count 
-------
    51
(1 row)

SELECT count(*) FROM varbittmp WHERE a >   '1110100111010'::varbit;
 count 
-------
    50
(1 row)