这是https://pig.apache.org/docs/r0.17.0/basic.html
中的示例cat data;
(3,8,9) (4,5,6)
(1,4,7) (3,7,5)
(2,5,8) (9,5,8)
A = LOAD 'data' AS (t1:tuple(t1a:int, t1b:int,t1c:int),t2:tuple(t2a:int,t2b:int,t2c:int));
DUMP A;
((3,8,9),(4,5,6))
((1,4,7),(3,7,5))
((2,5,8),(9,5,8))
我在maria_dev中创建了一个tp.txt,该日期具有相同的日期(即
(3,8,9) (4,5,6)
(1,4,7) (3,7,5)
(2,5,8) (9,5,8)
) 并阅读:
tp = LOAD 'tp.txt' as (t1:tuple(t1a:int, t1b:int,t1c:int),t2:tuple(t2a:int,t2b:int,t2c:int));
但是当我运行DUMP X时,得到以下输出:
((3,8,9),)
((1,4,7),)
((2,5,8),)
我在做什么错了?
答案 0 :(得分:0)
默认情况下,load语句假定您的字段用制表符分隔。您似乎在文本文件中使用空格。无需更改文件,您可以执行以下操作:
tp = LOAD 'tp.txt' USING PigStorage(' ') AS (t1:tuple(t1a:int, t1b:int,t1c:int),t2:tuple(t2a:int,t2b:int,t2c:int));
或者您可以使用制表符替换文本文件中的空格,并保持您的load语句不变。