weizuo93 opened a new pull request, #32233:
URL: https://github.com/apache/doris/pull/32233
## Proposed changes
Issue Number: close #xxx
There is column with type `date/datetime/decimal`when create table，but the
column type returned from `SHOW FULL COLUMNS FROM xxx`is
`dateV2/datetimeV2/decimalv3`. For example:
Create table:
```
CREATE TABLE `test_table` (
`a` DATETIME NULL,
`b` DATE NULL,
`c` DECIMAL(5, 1) NULL,
`d` INT NULL
) ENGINE=OLAP
DUPLICATE KEY(`a`, `b`)
COMMENT 'OLAP'
DISTRIBUTED BY HASH(`a`) BUCKETS 4
PROPERTIES (
"replication_allocation" = "tag.location.default: 1",
"storage_format" = "V2"
);
```
Show columns:
```
mysql> SHOW FULL COLUMNS FROM test_table;
+-------+-------------------+--------------+------+------+-----------+---------+--------------+--------------+
| Field | Type | Collation | Null | Key | Default |
Extra | Privileges | Comment |
+-------+-------------------+--------------+------+------+-----------+---------+--------------+--------------+
| a | datetimev2(0) | | YES | YES | NULL
| | | |
| b | datev2 | | YES | YES
| NULL | | | |
| c | decimalv3(5, 1) | | YES | NO | NULL
| NONE | | |
| d | int | | YES
| NO | NULL | NONE | | |
+-------+-------------------+--------------+------+------+-----------+--------+---------------+--------------+
4 rows in set (0.00 sec)
```
It is necessary to display `dateV2/datetimeV2/decimalv3` as
`date/datetime/decimal` in `ShowColumnStmt`. As follows：
```
mysql> SHOW FULL COLUMNS FROM test_table;
+-------+-------------------+--------------+------+------+-----------+---------+--------------+--------------+
| Field | Type | Collation | Null | Key | Default |
Extra | Privileges | Comment |
+-------+-------------------+--------------+------+------+-----------+---------+--------------+--------------+
| a | datetime | | YES | YES | NULL
| | | |
| b | date | | YES | YES
| NULL | | | |
| c | decimal(5, 1) | | YES | NO | NULL
| NONE | | |
| d | int | | YES | NO
| NULL | NONE | | |
+-------+-------------------+--------------+------+------+-----------+--------+---------------+--------------+
4 rows in set (0.00 sec)
```
Related PR：#18358
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