Executing as background process

If you execute tsql as a background process, tsql will exit before executing a query because of some limitation of Jline2.

Example:

$ bin/tsql  -f aggregation.sql &
[1] 19303
$
[1]+  Stopped                 ./bin/tsql -f aggregation.sql

To avoid above problem, Tajo provides the -B command as follows:

$ bin/tsql  -B -f aggregation.sql &
  [2] 19419
  Progress: 0%, response time: 0.218 sec
  Progress: 0%, response time: 0.22 sec
  Progress: 0%, response time: 0.421 sec
  Progress: 0%, response time: 0.823 sec
  Progress: 0%, response time: 1.425 sec
  Progress: 1%, response time: 2.227 sec