Zach Amsden 5905083bfe IMPALA-5127: Add history_max option ...

Allow users to keep a longer history of queries if desired.  I
personally find it useful to keep a long history of queries to
reference and want to bump this up to a very large value, but
keep the default reasonable.  Also change the config loader
to not freak out over unknown parameters so as not to break
for users that end up with new options set running on older
shells.

Testing: Created .impalarc as follows, now getting more history saved.
Put broken things in .impalarc and make sure they are logged as
warnings.

[impala]
history_max=1000

Change-Id: Iaf65bbecb8fd7f1105aac62b6745d6125a603d7f
Reviewed-on: http://gerrit.cloudera.org:8080/6335
Reviewed-by: Michael Brown <mikeb@cloudera.com>
Tested-by: Impala Public Jenkins

2017-05-16 02:35:22 +00:00

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