使用自定义断线加载CSV

Question

我有一个CSV，如下所示，行以"+++“结尾，而不是新行。如何通过在字符串"+++“存在的地方执行换行操作来加载csv？

VTS,51,0071,9739965515,NM,GP,INF01,V,19,072219,291014,0000.0000,N,00000.0000,E,07AE

VTS,01,0097,9739965515,SP,GP,18,072253,V,0000.0000,N,00000.0000,E,0.0,0.0,291014,0000,00,4000,11,999,169,B205+++VTS,51,0071,9739965515,NM,GP,INF01,V,18,072311,291014,0000.0000,N,00000.0000,E,C24E+++VTS,01,0097,9739965515,NM,GP,19,072311,V,0000.0000,N,00000.0000,E,0.0,0.0,291014,0000,00,4000,11,999,171,B358

VTS,51,0071,9739965515,NM,GP,INF01,V,18,072319,291014,0000.0000,N,00000.0000,E,012F
VTS,51,0071,9739965515,NM,GP,INF01,V,19,072326,291014,0000.0000,N,00000.0000,E,B2E6+++VTS,01,0097,9739965515,NM,GP,18,072326,V,0000.0000,N,00000.0000,E,0.0,0.0,291014,0000,00,4000,11,999,173,EAA0
VTS,51,0071,9739965515,NM,GP,INF01,V,18,072333,291014,0000.0000,N,00000.0000,E,9896
VTS,51,0071,9739965515,NM,GP,INF01,V,18,072340,291014,0000.0000,N,00000.0000,E,9B23

首先，我需要打破出现新行或"+++“符号的行，并加载数据。然后，再次使用第二列中的值01进行筛选。

预期输出：

VTS,01,0097,9739965515,SP,GP,18,072253,V,0000.0000,N,00000.0000,E,0.0,0.0,291014,0000,00,4000,11,999,169,B205
VTS,01,0097,9739965515,NM,GP,19,072311,V,0000.0000,N,00000.0000,E,0.0,0.0,291014,0000,00,4000,11,999,171,B358
VTS,01,0097,9739965515,NM,GP,18,072326,V,0000.0000,N,00000.0000,E,0.0,0.0,291014,0000,00,4000,11,999,173,EAA0

Answer 1

PigScript:

A = LOAD 'input.csv' AS (line:chararray);
B = FOREACH A {
                 splitRow = TOKENIZE(line,'+++');
                 GENERATE FLATTEN(splitRow) AS newList;
              }
C = FOREACH B GENERATE FLATTEN(STRSPLIT(newList,',',16));
D = FILTER C BY $1==01;
DUMP D;

OutPut:

(VTS,01,0097,9739965515,SP,GP,18,072253,V,0000.0000,N,00000.0000,E,0.0,0.0,291014,0000,00,4000,11,999,169,B205)
(VTS,01,0097,9739965515,NM,GP,19,072311,V,0000.0000,N,00000.0000,E,0.0,0.0,291014,0000,00,4000,11,999,171,B358)
(VTS,01,0097,9739965515,NM,GP,18,072326,V,0000.0000,N,00000.0000,E,0.0,0.0,291014,0000,00,4000,11,999,173,EAA0)