public static Long getFetchTimestamp(SourceRecord record) {
        Schema schema = record.valueSchema();
        Struct value = (Struct) record.value();
        if (schema.field(Envelope.FieldName.TIMESTAMP) == null) {
            return null;
        }
        return value.getInt64(Envelope.FieldName.TIMESTAMP);
    }
Return the timestamp when the change event is fetched in {@link DebeziumReader}.

<p>The field `ts_ms` in {@link SourceRecord} data struct is the time when the record fetched
by debezium reader, use it as the process time in Source.</p>
inlong-sort/sort-flink/sort-flink-v1.13/sort-connectors/mysql-cdc/src/main/java/org/apache/inlong/sort/cdc/mysql/source/utils/RecordUtils.java