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Dylan Coles
@dylancoles12334 14, Jun 2023 12:00 AM
select * query and MapReduce
If you run a select * query in Hive, why doesn't it run MapReduce?
answers 1
Answer 1
Michaela Samuel
@samuelmichaela5 21, Jun 2023 12:25 PM
The hive.fetch.task.conversion property of Hive lowers the latency of MapReduce overhead, and in effect when executing queries such as SELECT, FILTER, LIMIT, etc. it skips the MapReduce function.