[jira] [Commented] (IMPALA-6169) Implement DATE type

["ASF subversion and git services (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/IMPALA-6169?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16633292#comment-16633292 ] 

ASF subversion and git services commented on IMPALA-6169:
---------------------------------------------------------

Commit cb49371613909e56debee6275fd54759eb36ad33 in impala's branch refs/heads/master from [~attilaj]
[ https://git-wip-us.apache.org/repos/asf?p=impala.git;h=cb49371 ]

IMPALA-7492: Add support for DATE text parser/formatter

This change is the first step in implementing support for DATE type
(IMPALA-6169).

The DATE parser/formatter is implemented by the new DateParser class.
- The parser supports parsing both default and custom formatted DATE
values. CCTZ is used to validate the parsed dates.
- The formatter supports default and custom formatting of DATE values.

In the future, DateParser will be used in the text scanner/writer and
in the DATE <-> STRING cast functions.

The DateParser class reuses some of the functionality already
implemented in the TimestampParser class to minimize redundancy. To
make code reuse easier, a new namespace (datetime_parse_util) was
created and the common functionality was moved there.

This change also adds a new class (DateValue) to represent a DATE
value in-memory. The DateParser and DateValue classes are used only in
tests at the moment, therefore this patch doesn't change user facing
behavior.

Testing:
- Added BE-tests for DateParser and DateValue classes.
- Re-run parse-timestamp-benchmark to make sure that parser
  performance hasn't degraded.

Change-Id: I1eec00f22502c4c67c6807c4b51384419ea8b831
Reviewed-on: http://gerrit.cloudera.org:8080/11450
Reviewed-by: Impala Public Jenkins <im...@cloudera.com>
Tested-by: Impala Public Jenkins <im...@cloudera.com>


> Implement DATE type
> -------------------
>
>                 Key: IMPALA-6169
>                 URL: https://issues.apache.org/jira/browse/IMPALA-6169
>             Project: IMPALA
>          Issue Type: New Feature
>          Components: Backend
>            Reporter: Quanlong Huang
>            Assignee: Attila Jeges
>            Priority: Major
>
> In Hive, the Date type describes a particular year/month/day, in the form YYYY-­MM-­DD.
> Hive has supported Date type in Parquet two years ago in Hive-1.2.0. (See https://issues.apache.org/jira/browse/HIVE-8119 and https://cwiki.apache.org/confluence/display/Hive/Parquet#Parquet-VersionsandLimitations.)
> We should add support for Date type too.



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