qianchongyang opened a new pull request, #10638:
URL: https://github.com/apache/seatunnel/pull/10638
## Problem
When synchronizing data from Dameng Database to MySQL via the JDBC
connector, NVARCHAR2 data type is not supported. The JDBC connector fails to
map NVARCHAR2 columns during table synchronization.
## Solution
Added NVARCHAR2 type mapping to the Dameng JDBC dialect:
- Added NVARCHAR2 to DmDbTypes mapping
- Maps to equivalent Java/String type for proper data transfer
## Validation
```yaml
# Source table with NVARCHAR2 column
source:
plugin_name: Jdbc
driver: dm.jdbc.driver.DmDriver
table_list:
- table_path: sfsjzt.test_nvarchar2
# NVARCHAR2 columns now sync correctly
```
Fixes #10635
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