zhengxiang378928908-code commented on PR #12853:
URL: https://github.com/apache/seatunnel/pull/12853#issuecomment-6258960025

   @Eymenonar I verified this branch (`dad4e1244`) end to end with Zeta local: 
MySQL 8.0 -> PostgreSQL 16 now auto-creates `numeric(65,0)` / `numeric(50,30)` 
(unsigned `DECIMAL(65,0)` -> `numeric(65,0)`), and all rows round-trip exactly, 
including the 65-digit extremes and a 30-digit fraction. On dev the same job 
fails with `numeric field overflow`, or silently rounds the fraction to scale 
18. MySQL -> MySQL works on both, because the MySQL sink reuses the source 
column type. Details and two small suggestions (a non-MySQL target in the 
tests, and the incompatible-changes wording) are in 
https://github.com/apache/seatunnel/issues/12841#issuecomment-6258957032.


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