[IMPALA-192] Comments in impala-shell in interactive mode are not handled properly causing syntax errors or wrong results

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: Impala 0.7
• Fix Version/s: Impala 1.1
• Component/s: Clients
• Labels: shell
• Assignee: Lenni Kuff
• Reporter: John Russell
• Created: 04/Apr/13 18:12
• Updated: 28/Dec/15 17:43
• Resolved: 13/Jul/13 00:08

Description

Although impala-shell allows - single-line comments in batch mode via the -f option, it gives 'unrecognized command' errors if such comments are entered at the command prompt:

[localhost:21000] > - foo
Unrecognized command
[localhost:21000] > /* foo */
Unrecognized command

The command shell should allow comments the same way that -f processing does. Sometimes a user running code might copy and paste a range of lines. Sometimes a user conducting interactiv experiments might enter their own commentary during an impala-shell session, e.g. if they were using 'script' to save all the session output to a log file.

I include /* */ comments in this request because IMPALA-191 asks for impala-shell to allow that style of comments also.