我试过在Pig下面，但第四命令不起作用。

A = load '/user/mziauddi/logsam.txt' AS (str:chararray);
split1 = FOREACH A GENERATE FLATTEN(STRSPLIT(str, '\\,', 2)) AS (id:chararray, attr:chararray);
split2 = FOREACH split1 GENERATE id, STRSPLIT(attr, '[,]') AS attributes;
ORDER = FILTER split2 BY id=='ORD';