docete commented on a change in pull request #10035: [FLINK-14080][table-planner-blink] Introduce DateTime as internal representation of TIMESTAMP_WITHOUT_TIME_ZONE URL: https://github.com/apache/flink/pull/10035#discussion_r341488702
########## File path: flink-table/flink-table-runtime-blink/src/main/java/org/apache/flink/table/dataformat/DateTime.java ########## @@ -0,0 +1,179 @@ +/* + * 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.dataformat; + +import org.apache.flink.util.Preconditions; + +import java.time.LocalDate; +import java.time.LocalDateTime; +import java.time.LocalTime; + +/** + * Immutable SQL TIMESTAMP type with nanosecond precision. + * + * <p>This class is composite of a millisecond and nanoOfMillisecond. The millisecond part + * holds the integral second and the milli-of-second. The nanoOfMillisecond holds the + * nano-of-millisecond, which should between 0 - 999_999. Review comment: There are 3 methods to obtain a `java.sql.Timestamp` 1) Timestamp.valueOf("yyyy-mm-dd hh:mm:ss[.fffffffff]"), the maximum one is 9999-12-31 23:59:59.999999999". It's much smaller than Long.MAX 2) new Timestamp(long), the maximum one is new Timestamp(Long.MAX), and the long part hold 9223372036854775000, the int part hold 807000000. We will put the `807` to long part, which is exactly the `Long.MAX`. 3) Timestamp.valueOf(LocalDateTime): LocalDateTime has bigger range than `java.sql.Timestamp`, ignore this. So we can represent the biggest `java.sql.Timestamp`, which is "292278994-08-17 07:12:55.807" in human view. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: [email protected] With regards, Apache Git Services
