@Override
    public String dialectName() {
        return "PostgreSQL";
    }
Postgres upsert query. It use ON CONFLICT ... DO UPDATE SET.. to replace into Postgres.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/jdbc/src/main/java/org/apache/inlong/sort/jdbc/dialect/TDSQLPostgresDialect.java