-Parse MAP viarable Keys in HIVE
R J 2013-07-25, 18:08
I have a table in Apache Hive and I am interested in a specific field of the table. Table name: Table1 and field name f1. The field f1 is of type MAP<string, string>.
The table is huge. How could I find the distinct key values of the MAP variable f1 above?
$hive -e "select distinct map_keys(f1) from Table1;"
$hive -e "select k from Table1 LATERAL VIEW explode(f1) et as k,v;"
Each of the above returned syntax error. Could you please help.
If the existing values for a few fields of the table ate:
I want the return to be:
Thanks a lot.