RAL and RDL operations of DistSQL that are used in transactions.
DDL support in XA transactions depends on the database dialect. PostgreSQL and openGauss permit only DDL statements that do not change metadata.
Privileges required for XA transactions:
In MySQL8, you need to grant the user XA_RECOVER_ADMIN privileges, otherwise, the XA transaction manager will report an error when executing the XA RECOVER statement.
