Dear all,
other question, related with the previous one is: can I assume that
map_values(map) and map_keys(map) are going to be correlated? That is:
having this map: {k1:v1, k2:v2},
map_values will return [v1,v2] and
map_keys will return [k1,k2]
or
map_values will return [v2,v1] and
map_keys will return [k2,k1]
Thanks.
Zoraida.-
De: zoraida zora...@tid.esmailto:zora...@tid.es
Responder a: user@hive.apache.orgmailto:user@hive.apache.org
user@hive.apache.orgmailto:user@hive.apache.org
Fecha: martes, 4 de febrero de 2014 16:23
Para: user@hive.apache.orgmailto:user@hive.apache.org
user@hive.apache.orgmailto:user@hive.apache.org
Asunto: collect_list on two columns of the same row
Dear all,
I need to call to one of my UDFs that receives two arrays as a parameters. Each
of these arrays represents the result of collect_list(col) after doing group
by. Does the first position of the first array correspond with the first
position to the second array?
Por instace, having this:
col11 col21 col31
col12 col22 col32
col13 col23 col33
i would expect :
select col3,
result
from (
select col3, collect_list(col1) as col1_list,collect_list(col2) as
col2_list
from my_table
group by col3 ) tmp
lateral view my_udf([col11,col12,col13],[col21,col22,col23])tmp as result
is that correct?
Thanks.
Zoraida.-
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