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https://issues.apache.org/jira/browse/CASSANDRA-13549?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benjamin Lerer updated CASSANDRA-13549:
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Status: Ready to Commit (was: Patch Available)
> Cqlsh throws and error when querying a duration data type
> ---------------------------------------------------------
>
> Key: CASSANDRA-13549
> URL: https://issues.apache.org/jira/browse/CASSANDRA-13549
> Project: Cassandra
> Issue Type: Bug
> Components: CQL
> Environment: Cassandra 3.10 dev environment running on a MacOS Sierra
> Reporter: Akhil Mehra
> Assignee: Akhil Mehra
>
> h3. Overview
> Querying duration related data from the cqlsh prompt results in an error.
> Consider the following create table and insert statement.
> {code:title=Table and insert statement with duration data
> type|borderStyle=solid}
> CREATE TABLE duration_test (
> primary_key text,
> col20 duration,
> PRIMARY KEY (primary_key)
> );
> INSERT INTO duration_test (primary_key, col20) VALUES ('primary_key_example',
> 1y5mo89h4m48s);
> {code}
> On executing a select query on col20 in cqlsh I get an error "Failed to
> format value '"\x00\xfe\x02GS\xfc\xa5\xc0\x00' : 'ascii' codec can't decode
> byte 0xfe in position 2: ordinal not in range(128)"
> {code:title=Duration Query|borderStyle=solid}
> Select col20 from duration_test;
> {code}
> h3. Investigation
> On investigating this further I found that the current python Cassandra
> driver used found in
> lib/cassandra-driver-internal-only-3.7.0.post0-2481531.zip does not seem to
> support duration data type. This was added in Jan this year
> https://github.com/datastax/python-driver/pull/689.
> So I downloaded the latest driver release
> https://github.com/datastax/python-driver/releases/tag/3.9.0. I embedded the
> latest driver into cassandra-driver-internal-only-3.7.0.post0-2481531.zip.
> This fixed the driver related issue but there was still a formatting issue.
> I then went on to modify the format_value_duration methos in the
> pylib/cqlshlib/formatting.py. Diff posted below
> {code}
> @formatter_for('Duration')
> def format_value_duration(val, colormap, **_):
> - buf = six.iterbytes(val)
> - months = decode_vint(buf)
> - days = decode_vint(buf)
> - nanoseconds = decode_vint(buf)
> - return format_python_formatted_type(duration_as_str(months, days,
> nanoseconds), colormap, 'duration')
> + return format_python_formatted_type(duration_as_str(val.months,
> val.days, val.nanoseconds), colormap, 'duration')
> {code}
> This resulted in fixing the issue and duration types are now correctly
> displayed.
> Happy to fix the issue if I can get some guidance on:
> # If this is a valid issue. Tried searching JIRA but did not find anything
> reported.
> # If my assumptions are correct i.e. this is actually a bug
> # how to package the new driver into the source code.
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