SmiMi commented on issue #45873:
URL: https://github.com/apache/doris/issues/45873#issuecomment-2575052739
> You can find some useful information in the target directory, such as what
the doris adapter compiled your modify sql into.
Yes, I have found out why. dbt-doris extension does not compile
columns.description into the final sql file. Because it's using `CREATE TABLE
AS SELECT` statement 。For example, the finalsql is as follows:
```SQL
create table `bigdata`.`dim_test_after__dbt_tmp`
COMMENT 'aaaa'
as
select
cast(`customer_code` as varchar) as `customer_code`,
cast(`id` as varchar) as `id`,
cast(`customer_name` as varchar) as `customer_name`
from (
with middle_steo as (
select 1)
select customer_code, id,customer_name from dim_customer
) `_table_colume_type_name`
;
```
And this grammar does not support adding column comment。
So I have modified the dbt-doris extension, just add this SQL at the end of
final sql:
```SQL
ALTER TABLE `bigdata`.`dim_test_after__dbt_tmp` MODIFY COLUMN
`customer_code` COMMENT 'test',
MODIFY COLUMN `id` COMMENT 'test',
MODIFY COLUMN `customer_name` COMMENT 'test'
;
```
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