@Override
    public int maxTimestampPrecision() {
        return MAX_TIMESTAMP_PRECISION;
    }
Mysql upsert query use DUPLICATE KEY UPDATE.

<p>NOTE: It requires Mysql's primary key to be consistent with pkFields.

<p>We don't use REPLACE INTO, if there are other fields, we can keep their previous values.
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/jdbc/src/main/java/org/apache/inlong/sort/jdbc/dialect/MySQLDialect.java