add jar ${system:maven.local.repository}/org/apache/hive/hive-contrib/${system:hive.version}/hive-contrib-${system:hive.version}.jar;

CREATE TEMPORARY FUNCTION example_group_concat AS 'org.apache.hadoop.hive.contrib.udaf.example.UDAFExampleGroupConcat';

EXPLAIN
SELECT substr(value,5,1), example_group_concat("(", key, ":", value, ")")
FROM src
GROUP BY substr(value,5,1);

SELECT substr(value,5,1), example_group_concat("(", key, ":", value, ")")
FROM src
GROUP BY substr(value,5,1);


DROP TEMPORARY FUNCTION example_group_concat;