Hi, Sorry, this is a PIG newbie question...
When I use FLATTEN, I don't understand the structure of the relation that
is returned.
For example, the following relation A is the result of using flatten:
DESCRIBE A;
A {null::group: chararray,null::tagcount: long}
I'm not really sure why there is "null" prefixing group and tagcount. Can
anyone help explain what this means?
Thanks,
James
