All, I have a Hive 1.3 cluster running in production, and there was a question about INSERT OVERWRITE queries on tables. If I perform an INSERT OVERWRITE query on a table, and the query fails half way through, will the old data still exist in the table? I'm not completely clear on the exact process which INSERT OVERWRITE follows, but I believe it puts the data into the staging folder, and then does a remove and move, which should be safe. It could also just wipe the folder before the query starts however, which would cause issues if the query itself failed. Can someone give me a definitive answer on this? Pointers to the source code or documentation that explains this would be even better.
Thanks! David McGinnis
