Database Reference
In-Depth Information
Impala-shell command reference
After you launch Impala shell, you can use Impala shell commands to perform specific
tasks. You can also pass these commands to Impala shell using the
-q
option as an
argument. Some of these commands are referenced from SQL-like syntax because
they are passed to an impala daemon inside impala-shell as SQL-like statements. In-
side Impala shell, all the commands must end with a semicolon, as a semicolon is
used as a command termination sequence. In this section, we will cover most of these
commands, which you can run directly on Impala shell as shown in following screen-
shot:
In the previous screenshot, as soon as Impala shell is ready, the
show databases
command is used to list all the databases. These shell commands are described next,
within their specific section to provide better context around the commands, and to
explain their specific usage.
General commands
You can use the following general commands inside impala-shell to perform the vari-
ous actions described:
