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Subject [GitHub] [flink] JingsongLi commented on a change in pull request #10035: [FLINK-14080][table-planner-blink] Introduce PreciseTimestamp as inte…
Date Tue, 29 Oct 2019 14:25:54 GMT
JingsongLi commented on a change in pull request #10035: [FLINK-14080][table-planner-blink]
Introduce PreciseTimestamp as inte…
URL: https://github.com/apache/flink/pull/10035#discussion_r340102934
 
 

 ##########
 File path: flink-table/flink-table-runtime-blink/src/main/java/org/apache/flink/table/runtime/typeutils/PreciseTimestampSerializer.java
 ##########
 @@ -0,0 +1,189 @@
+/*
+ * 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.flink.table.runtime.typeutils;
+
+import org.apache.flink.api.common.typeutils.TypeSerializer;
+import org.apache.flink.api.common.typeutils.TypeSerializerSchemaCompatibility;
+import org.apache.flink.api.common.typeutils.TypeSerializerSnapshot;
+import org.apache.flink.core.memory.DataInputView;
+import org.apache.flink.core.memory.DataOutputView;
+import org.apache.flink.table.dataformat.PreciseTimestamp;
+
+import java.io.IOException;
+
+/**
+ * Serializer of {@link PreciseTimestamp}.
+ */
+public class PreciseTimestampSerializer extends TypeSerializer<PreciseTimestamp> {
+
+	private static final long serialVersionUID = 1L;
+
+	private final int precision;
+
+	public PreciseTimestampSerializer(int precision) {
+		this.precision = precision;
+	}
+
+	@Override
+	public boolean isImmutableType() {
+		return true;
+	}
+
+	@Override
+	public TypeSerializer<PreciseTimestamp> duplicate() {
+		return new PreciseTimestampSerializer(precision);
+	}
+
+	@Override
+	public PreciseTimestamp createInstance() {
+		return PreciseTimestamp.zero(precision);
+	}
+
+	@Override
+	public PreciseTimestamp copy(PreciseTimestamp from) {
+		return from.copy();
+	}
+
+	@Override
+	public PreciseTimestamp copy(PreciseTimestamp from, PreciseTimestamp reuse) {
+		return copy(from);
+	}
+
+	@Override
+	public int getLength() {
+		return -1;
 
 Review comment:
   We can have length.

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