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https://issues.apache.org/jira/browse/FLINK-6813?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
sunjincheng updated FLINK-6813:
-------------------------------
Description:
* Syntax
TIMESTAMPDIFF ( datepart , startdate , enddate )
-datepart
Is the part of startdate and enddate that specifies the type of boundary
crossed.
-startdate
Is an expression that can be resolved to a time, date.
-enddate
Same with startdate.
* Example
SELECT TIMESTAMPDIFF(year, '2015-12-31 23:59:59.9999999', '2017-01-01
00:00:00.0000000') from tab; --> 2
* See more:
[MySQL|https://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_timestampdiff]
CALCITE:
{code}
SELECT timestampdiff(YEAR, timestamp '2019-06-01 07:01:11', timestamp
'2020-06-01 07:01:11'),timestampdiff(QUARTER, timestamp '2019-06-01 07:01:11',
timestamp '2020-06-01 07:01:11'),timestampdiff(MONTH, timestamp '2019-06-01
07:01:11',timestamp '2020-06-01 07:01:11'),timestampdiff(WEEK, timestamp
'2019-06-01 07:01:11',timestamp '2020-06-01 07:01:11'),timestampdiff(DAY,
timestamp '2019-06-01 07:01:11',timestamp '2020-06-01
07:01:11'),timestampdiff(HOUR, timestamp '2019-06-01 07:01:11',timestamp
'2020-06-01 07:01:11'),timestampdiff(MINUTE, timestamp '2019-06-01
07:01:11',timestamp '2020-06-01 07:01:11'),timestampdiff(SECOND, timestamp
'2019-06-01 07:01:11',timestamp '2020-06-01 07:01:11') FROM depts;
| 1 | 4 | 12 | **52** | 366 | 8784 | 527040 |
31622400
{code}
MSSQL:
{code}
SELECT
datediff(YEAR, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
datediff(QUARTER, '2019-06-01 07:01:11', '2020-06-01 07:01:11'),
datediff(MONTH, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
datediff(WEEK, '2019-06-01 07:01:11', '2020-06-01 07:01:11'),
datediff(DAY, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
datediff(HOUR, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
datediff(MINUTE, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
datediff(SECOND, '2019-06-01 07:01:11', '2020-06-01 07:01:11')
FROM stu;
|1 |4 |12 |**53** |366 |8784 |527040 |31622400
{code}
The differences I have discussed with the calcite community. And find the
reason:
https://stackoverflow.com/questions/26138167/is-timestampdiff-in-mysql-equivalent-to-datediff-in-sql-server.
So, In this JIRA. we will keep consistency with calcite.
was:
* Syntax
TIMESTAMPDIFF ( datepart , startdate , enddate )
-datepart
Is the part of startdate and enddate that specifies the type of boundary
crossed.
-startdate
Is an expression that can be resolved to a time, date.
-enddate
Same with startdate.
* Example
SELECT TIMESTAMPDIFF(year, '2015-12-31 23:59:59.9999999', '2017-01-01
00:00:00.0000000') from tab; --> 2
CALCITE:
{code}
SELECT timestampdiff(YEAR, timestamp '2019-06-01 07:01:11', timestamp
'2020-06-01 07:01:11'),timestampdiff(QUARTER, timestamp '2019-06-01 07:01:11',
timestamp '2020-06-01 07:01:11'),timestampdiff(MONTH, timestamp '2019-06-01
07:01:11',timestamp '2020-06-01 07:01:11'),timestampdiff(WEEK, timestamp
'2019-06-01 07:01:11',timestamp '2020-06-01 07:01:11'),timestampdiff(DAY,
timestamp '2019-06-01 07:01:11',timestamp '2020-06-01
07:01:11'),timestampdiff(HOUR, timestamp '2019-06-01 07:01:11',timestamp
'2020-06-01 07:01:11'),timestampdiff(MINUTE, timestamp '2019-06-01
07:01:11',timestamp '2020-06-01 07:01:11'),timestampdiff(SECOND, timestamp
'2019-06-01 07:01:11',timestamp '2020-06-01 07:01:11') FROM depts;
| 1 | 4 | 12 | **52** | 366 | 8784 | 527040 |
31622400
{code}
MSSQL:
{code}
SELECT
datediff(YEAR, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
datediff(QUARTER, '2019-06-01 07:01:11', '2020-06-01 07:01:11'),
datediff(MONTH, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
datediff(WEEK, '2019-06-01 07:01:11', '2020-06-01 07:01:11'),
datediff(DAY, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
datediff(HOUR, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
datediff(MINUTE, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
datediff(SECOND, '2019-06-01 07:01:11', '2020-06-01 07:01:11')
FROM stu;
|1 |4 |12 |**53** |366 |8784 |527040 |31622400
{code}
The differences I have discussed with the calcite community. And find the
reason:
https://stackoverflow.com/questions/26138167/is-timestampdiff-in-mysql-equivalent-to-datediff-in-sql-server.
So, In this JIRA. we will keep consistency with calcite.
> Add TIMESTAMPDIFF supported in SQL
> ----------------------------------
>
> Key: FLINK-6813
> URL: https://issues.apache.org/jira/browse/FLINK-6813
> Project: Flink
> Issue Type: Sub-task
> Components: Table API & SQL
> Affects Versions: 1.4.0
> Reporter: sunjincheng
> Assignee: sunjincheng
>
> * Syntax
> TIMESTAMPDIFF ( datepart , startdate , enddate )
> -datepart
> Is the part of startdate and enddate that specifies the type of boundary
> crossed.
> -startdate
> Is an expression that can be resolved to a time, date.
> -enddate
> Same with startdate.
> * Example
> SELECT TIMESTAMPDIFF(year, '2015-12-31 23:59:59.9999999', '2017-01-01
> 00:00:00.0000000') from tab; --> 2
> * See more:
>
> [MySQL|https://dev.mysql.com/doc/refman/5.7/en/date-and-time-functions.html#function_timestampdiff]
> CALCITE:
> {code}
> SELECT timestampdiff(YEAR, timestamp '2019-06-01 07:01:11', timestamp
> '2020-06-01 07:01:11'),timestampdiff(QUARTER, timestamp '2019-06-01
> 07:01:11', timestamp '2020-06-01 07:01:11'),timestampdiff(MONTH, timestamp
> '2019-06-01 07:01:11',timestamp '2020-06-01 07:01:11'),timestampdiff(WEEK,
> timestamp '2019-06-01 07:01:11',timestamp '2020-06-01
> 07:01:11'),timestampdiff(DAY, timestamp '2019-06-01 07:01:11',timestamp
> '2020-06-01 07:01:11'),timestampdiff(HOUR, timestamp '2019-06-01
> 07:01:11',timestamp '2020-06-01 07:01:11'),timestampdiff(MINUTE, timestamp
> '2019-06-01 07:01:11',timestamp '2020-06-01 07:01:11'),timestampdiff(SECOND,
> timestamp '2019-06-01 07:01:11',timestamp '2020-06-01 07:01:11') FROM depts;
> | 1 | 4 | 12 | **52** | 366 | 8784 | 527040 |
> 31622400
> {code}
> MSSQL:
> {code}
> SELECT
> datediff(YEAR, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
> datediff(QUARTER, '2019-06-01 07:01:11', '2020-06-01 07:01:11'),
> datediff(MONTH, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
> datediff(WEEK, '2019-06-01 07:01:11', '2020-06-01 07:01:11'),
> datediff(DAY, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
> datediff(HOUR, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
> datediff(MINUTE, '2019-06-01 07:01:11','2020-06-01 07:01:11'),
> datediff(SECOND, '2019-06-01 07:01:11', '2020-06-01 07:01:11')
> FROM stu;
> |1 |4 |12 |**53** |366 |8784 |527040 |31622400
> {code}
> The differences I have discussed with the calcite community. And find the
> reason:
> https://stackoverflow.com/questions/26138167/is-timestampdiff-in-mysql-equivalent-to-datediff-in-sql-server.
> So, In this JIRA. we will keep consistency with calcite.
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