xy720 opened a new pull request, #19952:
URL: https://github.com/apache/doris/pull/19952
# Proposed changes
How to reproduce:
```
CREATE TABLE `test_tbl` (
`k1` int(11) NOT NULL,
`k2` varchar(4096) NOT NULL,
`k3` varchar(4096) NOT NULL,
`v1` float SUM NOT NULL,
`v2` decimal(20, 7) SUM NOT NULL
) ENGINE=OLAP
AGGREGATE KEY(`k1`, `k2`, `k3`)
COMMENT 'OLAP'
DISTRIBUTED BY HASH(`k1`, `k2`) BUCKETS 1
PROPERTIES (
"replication_allocation" = "tag.location.default: 1",
"storage_format" = "V2",
"disable_auto_compaction" = "false"
);
insert into test_tbl values(1,"1","20200101",1,1), (2,"2","2020/01/02",2,2),
(3,"3","2020-01-03",3,3), (4,"4","200104",4,4), (5,"5","20/01/05",5,5),
(6,"6","20-01-06",6,6);
alter table test_tbl MODIFY COLUMN k3 date;
ERROR 1105 (HY000): errCode = 2, detailMessage = Can not change VARCHAR to
DATEV2
```
## Problem summary
Describe your changes.
## Checklist(Required)
* [ ] Does it affect the original behavior
* [x] Has unit tests been added
* [ ] Has document been added or modified
* [ ] Does it need to update dependencies
* [ ] Is this PR support rollback (If NO, please explain WHY)
## Further comments
If this is a relatively large or complex change, kick off the discussion at
[[email protected]](mailto:[email protected]) by explaining why you
chose the solution you did and what alternatives you considered, etc...
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