sql - hive query schema creation for nested fields -


i trying add hive schema , partition query data hdfs file system has nested fields(parent, sub , sub of sub field).

my data format is:

country -> main field state -> sub field of main field "country" city -> sub field of field "state"

hive schema:

create external table if not exists test_table ( country map<string,map<string,string>> )  partitioned (date string, hour string)  row format serde 'org.openx.data.jsonserde.jsonserde'  stored textfile location '/user/logs/';

i query country['state'] , country['city'] above table not able query parent field "country". if change schema country map<string,string>, works country , country['state'] works not country['start']['city']

it throws error message:

failed exception java.io.ioexception:org.apache.hadoop.hive.ql.metadata.hiveexception: java.lang.classcastexception:  java.lang.string cannot cast org.openx.data.jsonserde.json.jsonobject

how can query 3 fields (parent, child , child of child)?


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