Andrew Sherman created HIVE-18127:
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Summary: Do not strip '--' comments from shell commands issued
from CliDriver
Key: HIVE-18127
URL: https://issues.apache.org/jira/browse/HIVE-18127
Project: Hive
Issue Type: Bug
Reporter: Andrew Sherman
Assignee: Andrew Sherman
CLiDriver has the ability to run shell commands by prefixing them with '!".
This behavior is not widely used (there are only 3 examples in .q files).
Since HIVE-16935 started stripping comments starting with '\-\-', a shell
command containing '--' will not work correctly.
Fix this by using the unstripped command for shell commands.
Note that it would be a security hole for HS2 to allow execution of arbitrary
shell commands from a client command.
Add tests to nail down correct behavior with '--' comments:
* CliDriver should not strip strings starting with '--' in a shell command
(FIXED in this change).
* HiveCli should strip '--' comments.
* A Jdbc program should allow commands starting with "!" but these will fail in
the sql parser.
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