Oleksiy Sayankin created HIVE-18702:
---------------------------------------

             Summary: "Insert overwrite table" doesn't clean the table 
directory before overwriting
                 Key: HIVE-18702
                 URL: https://issues.apache.org/jira/browse/HIVE-18702
             Project: Hive
          Issue Type: Bug
            Reporter: Oleksiy Sayankin
            Assignee: Oleksiy Sayankin


*STEP 1. Create test data*

{code}
nano /home/test/users.txt
{code}

Add to file:

{code}
Peter,34
John,25
Mary,28
{code}

{code}
hadoop fs -mkdir /bug
hadoop fs -copyFromLocal /home/test/users.txt /bug
hadoop fs -ls /bug
{code}

*EXPECTED RESULT:*

{code}
Found 2 items                                                                   
-rwxr-xr-x   3 root root         25 2015-10-15 16:11 /bug/users.txt
{code}

*STEP 2. Upload data to hive*

{code}
create external table bug(name string, age int) ROW FORMAT DELIMITED FIELDS 
TERMINATED BY ',' LINES TERMINATED BY '\n' LOCATION '/bug';
select * from bug;
{code}

*EXPECTED RESULT:*

{code}
OK
Peter   34
John    25
Mary    28
{code}

{code}
create external table bug1(name string, age int) ROW FORMAT DELIMITED FIELDS 
TERMINATED BY ',' LINES TERMINATED BY '\n' LOCATION '/bug1';
insert overwrite table bug select * from bug1;
select * from bug;
{code}

*EXPECTED RESULT:*

{code}
OK
Time taken: 0.097 seconds
{code}

*ACTUAL RESULT:*

{code}
hive>  select * from bug;
OK
Peter   34
John    25
Mary    28
Time taken: 0.198 seconds, Fetched: 3 row(s)
{code}




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