zhengxiang378928908-code commented on PR #11684:
URL: https://github.com/apache/seatunnel/pull/11684#issuecomment-5214091560

   Correcting something in my own PR description.
   
   I originally wrote that no E2E test was added because there is no Dameng E2E 
suite and no publicly available test image. That was wrong. `JdbcDmIT` already 
exists in `connector-jdbc-e2e-part-5` and runs against the public 
`laglangyue/dmdb8` image, and its `CREATE_SQL` even covers `VARCHAR2` — it just 
has no `NVARCHAR`/`NCHAR`/`NVARCHAR2` column, which is very likely why this gap 
went unnoticed.
   
   I had based that statement on a search of my own that was too narrow to find 
the file, and I should have verified before claiming the suite did not exist.
   
   I've pushed E2E coverage and rewritten that section of the description:
   
   - `DM_NVARCHAR2 NVARCHAR2(50)` added to `JdbcDmIT`, with the matching 
`fieldNames` entry, row value and the explicit insert column list in 
`jdbc_dm_source_and_sink.conf`
   - the column is populated with multi-byte content so the national character 
path is actually exercised
   - insert columns, placeholders, `fieldNames` and the row array are 
consistent at 34 entries
   - `JdbcDmUpsetIT` declares its own table and is unaffected
   
   One thing I want to be explicit about: I could not run this suite locally 
because Docker is unavailable in my environment, so the container path is 
validated by CI rather than by me. `./mvnw test-compile` on 
`connector-jdbc-e2e-part-5` passes.
   
   The code change and the unit test are unchanged.
   


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