Bugfix: fix exception Cannot parse "0000-00-00 00:00:00" (#270)

Author: lfyzjck

tidb/src/main/java/io/tidb/bigdata/tidb/meta/TiColumnInfo.java

@@ -215,7 +215,8 @@ String getOriginDefaultValue() {
     }
   }
 
-  private ByteString getOriginDefaultValueAsByteString() {
+  @VisibleForTesting
+  public ByteString getOriginDefaultValueAsByteString() {
     CodecDataOutput cdo = new CodecDataOutput();
     type.encode(
         cdo, EncodeType.VALUE, type.getOriginDefaultValue(getOriginDefaultValue(), version));

tidb/src/main/java/io/tidb/bigdata/tidb/types/TimestampType.java

@@ -48,6 +48,9 @@ public class TimestampType extends AbstractDateTimeType {
 
   public static final MySQLType[] subTypes = new MySQLType[] {MySQLType.TypeTimestamp};
 
+  /** Default value for timestamp type is 0000-00-00 00:00:00 */
+  public static final String TIMESTAMP_NULL_DEFAULT = "0000-00-00 00:00:00";
+
   TimestampType(MySQLType tp) {
     super(tp);
   }
@@ -90,6 +93,16 @@ protected Timestamp decodeNotNullForBatchWrite(int flag, CodecDataInput cdi) {
     return decodeDateTimeForBatchWrite(flag, cdi);
   }
 
+  @Override
+  public Object getOriginDefaultValue(String value, long version) {
+    // avoid exception: org.joda.time.IllegalFieldValueException: Cannot parse "0000-00-00
+    // 00:00:00": Value 0 for monthOfYear must be in the range [1,12]
+    if (TIMESTAMP_NULL_DEFAULT.equals(value)) {
+      value = null;
+    }
+    return super.getOriginDefaultValue(value, version);
+  }
+
   @Override
   public DateTime getOriginDefaultValueNonNull(String value, long version) {
     if (version >= DataType.COLUMN_VERSION_FLAG) {

tidb/src/test/java/io/tidb/bigdata/tidb/meta/TiColumnInfoTest.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright 2024 TiDB Project Authors.
+ *
+ * Licensed 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 io.tidb.bigdata.tidb.meta;
+
+import static org.junit.Assert.assertEquals;
+
+import io.tidb.bigdata.tidb.types.TimestampType;
+import org.junit.Test;
+
+public class TiColumnInfoTest {
+
+  @Test
+  public void testToProto() {
+    TiColumnInfo columnInfo =
+        new TiColumnInfo(
+            1L,
+            "name",
+            0,
+            TimestampType.TIMESTAMP,
+            SchemaState.StatePublic,
+            "0000-00-00 00:00:00",
+            "2024-04-01 00:00:00",
+            "0000-00-00 00:00:00",
+            "timestamp",
+            1,
+            "",
+            false);
+    assertEquals("\000", columnInfo.getOriginDefaultValueAsByteString().toStringUtf8());
+  }
+}