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https://issues.apache.org/jira/browse/HIVE-13557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15468812#comment-15468812
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Carter Shanklin commented on HIVE-13557:
----------------------------------------
Hive supports interval but only with the singular forms, which is annoying.
Hive:
{code}
hive> select date '2012-01-01' + interval '-30' day;
OK
2011-12-02 00:00:00
Time taken: 0.506 seconds, Fetched: 1 row(s)
hive> select date '2012-01-01' + interval '-30' days;
NoViableAltException(146@[323:1: atomExpression : ( ( KW_NULL )=> KW_NULL ->
TOK_NULL | ( constant )=> constant | castExpression | caseExpression |
whenExpression | ( functionName LPAREN )=> function | tableOrColumn | LPAREN !
expression RPAREN !);])
.... long traceback truncated
{code}
Same is true of month and year. Hive doesn't support either "week" or "weeks"
like other databases do.
Compare Postgres:
{code}
vagrant=# select date '2012-01-01' + (-30) days;
days
------------
2011-12-02
(1 row)
vagrant=# select date '2012-01-01' + interval '-30' day;
?column?
---------------------
2011-12-02 00:00:00
(1 row)
vagrant=# select date '2012-01-01' + interval '-30' days;
days
---------------------
2011-12-31 23:59:30
(1 row)
{code}
Cleaning this stuff up would be really great.
> Make interval keyword optional while specifying DAY in interval arithmetic
> --------------------------------------------------------------------------
>
> Key: HIVE-13557
> URL: https://issues.apache.org/jira/browse/HIVE-13557
> Project: Hive
> Issue Type: Sub-task
> Components: Types
> Reporter: Ashutosh Chauhan
>
> Currently we support expressions like: {code}
> WHERE SOLD_DATE BETWEEN ((DATE('2000-01-31')) - INTERVAL '30' DAY) AND
> DATE('2000-01-31')
> {code}
> We should support:
> {code}
> WHERE SOLD_DATE BETWEEN ((DATE('2000-01-31')) + (-30) DAY) AND
> DATE('2000-01-31')
> {code}
>
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