diff --git a/tikv-client/src/main/java/com/pingcap/tikv/columnar/TiBlockColumnVector.java b/tikv-client/src/main/java/com/pingcap/tikv/columnar/TiBlockColumnVector.java
index 2f0870c3f..737156eb3 100644
--- a/tikv-client/src/main/java/com/pingcap/tikv/columnar/TiBlockColumnVector.java
+++ b/tikv-client/src/main/java/com/pingcap/tikv/columnar/TiBlockColumnVector.java
@@ -18,8 +18,8 @@
 
 import static com.pingcap.tikv.util.MemoryUtil.EMPTY_BYTE_BUFFER_DIRECT;
 
-import com.pingcap.tikv.ExtendedDateTime;
 import com.google.common.primitives.UnsignedLong;
+import com.pingcap.tikv.ExtendedDateTime;
 import com.pingcap.tikv.codec.Codec.DateCodec;
 import com.pingcap.tikv.codec.Codec.DateTimeCodec;
 import com.pingcap.tikv.columnar.datatypes.CHType;