Apache pig 清管器过滤器或操作员

为什么我在b中仍然得到

“n#/a”

结果与预期一致，因为您正在使用！=和或。您将获得带有

“n#/a”

的行，因为至少有一个条件适用于

（2008-Jan-12，n#/a，n#/a，27）

和

（2008-Jan-12，n#/a，13.00，n#/a）

如果要筛选没有

“n#/a”的行

，请使用

和

a = load '/user/home/samp.txt' using PigStorage(',');
dump a;
(2008-Jan-12,12.1,13.1,36.0)
(2008-Jan-13,13.1,14.1,45.00)
(2008-Jan-15,14.2,15.2,47.00)
(2008-Jan-16,16.1,17.1,47.5)
(2008-Jan-12,8.5,17,50,12.0)
(2008-Jan-12,n#/a,n#/a,n#/a)
(2008-Jan-19,n#/a,n#/a,n#/a)
(2008-Jan-12,n#/a,n#/a,27)
(2008-Jan-12,n#/a,13.00,n#/a)
b = filter a by ($1!='n#/a' OR $2!='n#/a' OR $3!='n#/a');
dump b;
(2008-Jan-12,12.1,13.1,36.0)
(2008-Jan-13,13.1,14.1,45.00)
(2008-Jan-15,14.2,15.2,47.00)
(2008-Jan-16,16.1,17.1,47.5)
(2008-Jan-12,8.5,17,50,12.0)
(2008-Jan-12,n#/a,n#/a,27)
(2008-Jan-12,n#/a,13.00,n#/a)

如果要使用或，则组合逻辑或结果，然后求反

B = FILTER A BY (($1 != 'n#/a') AND ($2 != 'n#/a' ) AND ($3 != 'n#/a' ));

或

输出

B = FILTER A BY NOT($1 == 'n#/a' OR $2 == 'n#/a' OR $3 == 'n#/a');

B = FILTER A BY NOT($1 matches 'n#/a' OR $2 matches 'n#/a' OR $3 matches 'n#/a');