[
https://issues.apache.org/jira/browse/CALCITE-759?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16491234#comment-16491234
]
Sergey Nuyanzin commented on CALCITE-759:
-----------------------------------------
Not fully understand what is wrong with existing DAYOFWEEK, DAYOFMONTH,
DAYOFYEAR, QUARTER in Calcite {noformat}0:
jdbc:calcite:model=target/test-classes/mod> select dayofweek(date '2007-02-03');
+---------------------+
| EXPR$0 |
+---------------------+
| 7 |
+---------------------+
1 row selected (0.023 seconds)
0: jdbc:calcite:model=target/test-classes/mod> select dayofyear(date
'2007-02-03');
+---------------------+
| EXPR$0 |
+---------------------+
| 34 |
+---------------------+
1 row selected (0.132 seconds)
0: jdbc:calcite:model=target/test-classes/mod> select dayofmonth(date
'2007-02-03');
+---------------------+
| EXPR$0 |
+---------------------+
| 3 |
+---------------------+
1 row selected (0.042 seconds)
0: jdbc:calcite:model=target/test-classes/mod> select quarter(date
'2007-02-03');
+---------------------+
| EXPR$0 |
+---------------------+
| 1 |
+---------------------+
{noformat}
?
> Add DayOfWeek and other missing date/time functions
> ---------------------------------------------------
>
> Key: CALCITE-759
> URL: https://issues.apache.org/jira/browse/CALCITE-759
> Project: Calcite
> Issue Type: Bug
> Reporter: Julian Hyde
> Assignee: Julian Hyde
> Priority: Major
> Labels: dialect, newbie
>
> Calcite implements EXTRACT, FLOOR, CEIL, CAST, +, - on date/time values and
> much can be accomplished with these. But there are other useful functions in
> other databases.
> For example MySQL has DayOfWeek. See
> https://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html. It is
> tricky to achieve the same in Calcite (you'd need to subtract the epoch and
> take the interval modulo 7).
> We need to review the date/time functions in MySQL, Postgres and Oracle, and
> add functions to ensure that you can accomplish the same things in Calcite
> fairly easily.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
