Pavel Pereslegin created CALCITE-6287:
-----------------------------------------
Summary: Result of interval aritumetic with
TIMESTAMP_WITH_LOCAL_TIME_ZONE is incorrect.
Key: CALCITE-6287
URL: https://issues.apache.org/jira/browse/CALCITE-6287
Project: Calcite
Issue Type: Bug
Reporter: Pavel Pereslegin
I encountered that addition TIMESTAMP_WITH_LOCAL_TIME_ZONE with months and
years doesn't work correctly.
For example the following test
{code:sql}
select TIMESTAMP WITH LOCAL TIME ZONE '2021-01-01 00:00:00' + INTERVAL 1 MONTH;
+---------------------+
| EXPR$0 |
+---------------------+
| 2021-02-01 00:00:00 |
+---------------------+
(1 row)
{code}
fails:
{noformat}
< | 2021-02-01 00:00:00 |
---
> | 2021-01-01 00:00:00 |
{noformat}
The same test with regular TIMESTAMP works fine.
As far as I understand, to fix this case, you need to add
TIMESTAMP_WITH_LOCAL_TIME_ZONE in two places:
1. {{StandardConvertletTable#convertPlus}} (switch missed
*_WITH_LOCAL_TIME_ZONE types)
2. {{DatetimeArithmeticImplementor#implementSafe}} Similar to {{TIMESTAMP}}
{{BuiltInMethod.ADD_MONTHS}} should be used for
{{TIMESTAMP_WITH_LOCAL_TIME_ZONE}}.
--
This message was sent by Atlassian Jira
(v8.20.10#820010)
