I am currently getting “Type mismatch in key from map: expected
org.apache.pig.impl.io.NullableBytesWritable, recieved
org.apache.pig.impl.io.NullableText “
I looked up the PIG-919 and related comments, but could not understand the
reason or the workaround for this problem.
Could you please kindly explain this further?
I am getting this even before my GROUP, when I do my 3 way JOIN.
A1 = JOIN AA BY rid, BB BY rid;
A2 = JOIN A1 BY BB::cid, CC by cid;
DESCRIBE A2;
A3 = FOREACH A2 GENERATE FLATTEN((TOTUPLE(BB::rid)));
DESCRIBE A3;
DUMP A3;
DESCRIBE looks like below.
A2: {A1::AA::rid: bytearray,A1::AA::roname: bytearray,A1::AA::asid:
bytearray,A1::AA::asname: bytearray,A1::BB::rid: bytearray,A1::BB::roname:
bytearray,A1::BB::cid: bytearray,A1::BB::csname: bytearray,CC::cid:
bytearray,CC::csname: bytearray,CC::chid: bytearray,CC::chname: bytearray}
A3: {org.apache.pig.builtin.totuple_A1::BB::rid_3::A1::BB::rid: bytearray}
If map is a problem, I tried to convert it to tuple (For A3) above, but it
still does not work, in fact A3 still describes it as map (with a {}, I
guess) Why is that?
Appreciate your help! Thanks!!
