[DEV][DOC] Add some hints to the mysql documentation (#2855)
* add mysql connector doc
* add mysql connector doc
diff --git a/docs/en/connector-v2/sink/Jdbc.md b/docs/en/connector-v2/sink/Jdbc.md
index ed6285e..8393cc1 100644
--- a/docs/en/connector-v2/sink/Jdbc.md
+++ b/docs/en/connector-v2/sink/Jdbc.md
@@ -73,8 +73,9 @@
The timeout after the transaction is opened, the default is -1 (never timeout). Note that setting the timeout may affect exactly-once semantics
## tips
-In the case of is_exactly_once = "true", Xa transactions are used. This requires database support, and some databases require some setup. For example, postgres needs to set `max_prepared_transactions > 1`
-Such as `ALTER SYSTEM set max_prepared_transactions to 10`.
+In the case of is_exactly_once = "true", Xa transactions are used. This requires database support, and some databases require some setup :
+ 1 postgres needs to set `max_prepared_transactions > 1` such as `ALTER SYSTEM set max_prepared_transactions to 10`.
+ 2 mysql version need >= `8.0.29` and Non-root users need to grant `XA_RECOVER_ADMIN` permissions. such as `grant XA_RECOVER_ADMIN on test_db.* to 'user1'@'%'`.
## appendix
there are some reference value for params above.
