azexcy commented on code in PR #24598:
URL: https://github.com/apache/shardingsphere/pull/24598#discussion_r1136444865
##########
db-protocol/mysql/src/main/java/org/apache/shardingsphere/db/protocol/mysql/packet/binlog/row/column/value/time/MySQLFractionalSeconds.java:
##########
@@ -26,41 +27,29 @@
*/
public final class MySQLFractionalSeconds {
- private final int fraction;
+ @Getter
+ private final int nanos;
private final int fractionalSecondsPrecision;
public MySQLFractionalSeconds(final int columnMeta, final
MySQLPacketPayload payload) {
fractionalSecondsPrecision = columnMeta;
- fraction = readFraction(payload);
+ nanos = readFraction(payload);
}
private int readFraction(final MySQLPacketPayload payload) {
Review Comment:
eg. the fractional seconds is `.77` means the precision is 2, equals 0.77
seconds, to nanos is `0.77 * 1000 * 1000 * 1000`, paylod.readInt1() will return
77
the fractional seconds is `.773` means the precision is 3, equals 0.773
seconds, to nanos is `0.773 * 1000 * 1000`, paylod.readUnsignedShort() will
return 773
##########
db-protocol/mysql/src/main/java/org/apache/shardingsphere/db/protocol/mysql/packet/binlog/row/column/value/time/MySQLDatetime2BinlogProtocolValue.java:
##########
@@ -46,15 +48,16 @@ private long readDatetimeV2FromPayload(final
MySQLPacketPayload payload) {
private Serializable readDatetime(final MySQLBinlogColumnDef columnDef,
final long datetime, final MySQLPacketPayload payload) {
long datetimeWithoutSign = datetime & (0x8000000000L - 1);
- return readDate(datetimeWithoutSign >> 17) + " " +
readTime(datetimeWithoutSign % (1 << 17)) + new
MySQLFractionalSeconds(columnDef.getColumnMeta(), payload);
- }
-
- private String readDate(final long date) {
+ long date = datetimeWithoutSign >> 17;
long yearAndMonth = date >> 5;
- return String.format("%d-%02d-%02d", yearAndMonth / 13, yearAndMonth %
13, date % (1 << 5));
- }
-
- private String readTime(final long time) {
- return String.format("%02d:%02d:%02d", time >> 12, (time >> 6) % (1 <<
6), time % (1 << 6));
+ int year = (int) (yearAndMonth / 13);
+ int month = (int) (yearAndMonth % 13);
+ int day = (int) (date % (1 << 5));
+ long time = datetimeWithoutSign % (1 << 17);
+ int hour = (int) (time >> 12);
+ int minute = (int) ((time >> 6) % (1 << 6));
+ int second = (int) (time % (1 << 6));
+ MySQLFractionalSeconds fractionalSeconds = new
MySQLFractionalSeconds(columnDef.getColumnMeta(), payload);
+ return Timestamp.valueOf(LocalDateTime.of(year, month, day, hour,
minute, second, fractionalSeconds.getNanos()));
Review Comment:
eg. value is`2023-03-14 19:30:16.770925`
it's the above year, month, day, hour, minute and second, the fractional
seconds is `.770925`
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