[Feature] Support nanosecond in SelectDB DateTimeV2 type (#6332)

seatunnel-common/src/main/java/org/apache/seatunnel/common/utils/DateTimeUtils.java

@@ -33,6 +33,9 @@ public class DateTimeUtils {
         FORMATTER_MAP.put(
                 Formatter.YYYY_MM_DD_HH_MM_SS,
                 DateTimeFormatter.ofPattern(Formatter.YYYY_MM_DD_HH_MM_SS.value));
+        FORMATTER_MAP.put(
+                Formatter.YYYY_MM_DD_HH_MM_SS_SSSSSS,
+                DateTimeFormatter.ofPattern(Formatter.YYYY_MM_DD_HH_MM_SS_SSSSSS.value));
         FORMATTER_MAP.put(
                 Formatter.YYYY_MM_DD_HH_MM_SS_SPOT,
                 DateTimeFormatter.ofPattern(Formatter.YYYY_MM_DD_HH_MM_SS_SPOT.value));
@@ -71,6 +74,7 @@ public static String toString(long timestamp, Formatter formatter) {
 
     public enum Formatter {
         YYYY_MM_DD_HH_MM_SS("yyyy-MM-dd HH:mm:ss"),
+        YYYY_MM_DD_HH_MM_SS_SSSSSS("yyyy-MM-dd HH:mm:ss.SSSSSS"),
         YYYY_MM_DD_HH_MM_SS_SPOT("yyyy.MM.dd HH:mm:ss"),
         YYYY_MM_DD_HH_MM_SS_SLASH("yyyy/MM/dd HH:mm:ss"),
         YYYY_MM_DD_HH_MM_SS_NO_SPLIT("yyyyMMddHHmmss"),

seatunnel-connectors-v2/connector-selectdb-cloud/src/main/java/org/apache/seatunnel/connectors/selectdb/serialize/SeaTunnelRowConverter.java

@@ -35,7 +35,8 @@ public class SeaTunnelRowConverter {
     @Builder.Default private DateUtils.Formatter dateFormatter = DateUtils.Formatter.YYYY_MM_DD;
 
     @Builder.Default
-    private DateTimeUtils.Formatter dateTimeFormatter = DateTimeUtils.Formatter.YYYY_MM_DD_HH_MM_SS;
+    private DateTimeUtils.Formatter dateTimeFormatter =
+            DateTimeUtils.Formatter.YYYY_MM_DD_HH_MM_SS_SSSSSS;
 
     @Builder.Default private TimeUtils.Formatter timeFormatter = TimeUtils.Formatter.HH_MM_SS;
 

seatunnel-connectors-v2/connector-selectdb-cloud/src/test/java/org/apache/seatunnel/connectors/selectdb/serialize/SeaTunnelRowConverterTest.java

@@ -0,0 +1,54 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.seatunnel.connectors.selectdb.serialize;
+
+import org.apache.seatunnel.api.table.type.LocalTimeType;
+
+import org.junit.jupiter.api.Assertions;
+import org.junit.jupiter.api.Test;
+
+import java.time.LocalDateTime;
+
+public class SeaTunnelRowConverterTest {
+
+    private static final SeaTunnelRowConverter seaTunnelRowConverter = new SeaTunnelRowConverter();
+
+    @Test
+    void testDateTimeWithNano() {
+        Assertions.assertEquals(
+                "2021-01-01 00:00:00.123456",
+                seaTunnelRowConverter.convert(
+                        LocalTimeType.LOCAL_DATE_TIME_TYPE,
+                        LocalDateTime.of(2021, 1, 1, 0, 0, 0, 123456789)));
+        Assertions.assertEquals(
+                "2021-01-01 00:00:00.000000",
+                seaTunnelRowConverter.convert(
+                        LocalTimeType.LOCAL_DATE_TIME_TYPE,
+                        LocalDateTime.of(2021, 1, 1, 0, 0, 0, 0)));
+        Assertions.assertEquals(
+                "2021-01-01 00:00:00.000001",
+                seaTunnelRowConverter.convert(
+                        LocalTimeType.LOCAL_DATE_TIME_TYPE,
+                        LocalDateTime.of(2021, 1, 1, 0, 0, 0, 1000)));
+        Assertions.assertEquals(
+                "2021-01-01 00:00:00.000123",
+                seaTunnelRowConverter.convert(
+                        LocalTimeType.LOCAL_DATE_TIME_TYPE,
+                        LocalDateTime.of(2021, 1, 1, 0, 0, 0, 123456)));
+    }
+}