PREHOOK: query: select count(distinct subq.key) from (FROM src MAP src.key USING 'python ../data/scripts/dumpdata_script.py' AS key WHERE src.key = 10) subq PREHOOK: type: QUERY PREHOOK: Input: default@src PREHOOK: Output: file:/data/users/njain/hive5/hive5/build/ql/tmp/920614307/10000 POSTHOOK: query: select count(distinct subq.key) from (FROM src MAP src.key USING 'python ../data/scripts/dumpdata_script.py' AS key WHERE src.key = 10) subq POSTHOOK: type: QUERY POSTHOOK: Input: default@src POSTHOOK: Output: file:/data/users/njain/hive5/hive5/build/ql/tmp/920614307/10000 1000022