docete commented on a change in pull request #10035: [FLINK-14080][table-planner-blink] Introduce Timestamp as inte… URL: https://github.com/apache/flink/pull/10035#discussion_r340506966
########## File path: flink-table/flink-table-runtime-blink/src/main/java/org/apache/flink/table/dataformat/Timestamp.java ########## @@ -0,0 +1,202 @@ +/* + * 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; + +import static org.apache.calcite.avatica.util.DateTimeUtils.MILLIS_PER_DAY; +import static org.apache.calcite.avatica.util.DateTimeUtils.MILLIS_PER_HOUR; +import static org.apache.calcite.avatica.util.DateTimeUtils.MILLIS_PER_MINUTE; +import static org.apache.calcite.avatica.util.DateTimeUtils.MILLIS_PER_SECOND; +import static org.apache.calcite.avatica.util.DateTimeUtils.unixTimestamp; + +/** + * 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. + */ +public class Timestamp implements Comparable<Timestamp> { + + // nanos per second + public static final long NANOS_PER_SECOND = 1000_000_000L; + + // nanos per minute + public static final long NANOS_PER_MINUTE = NANOS_PER_SECOND * 60; + + // nanos per second + public static final long NANOS_PER_HOUR = NANOS_PER_MINUTE * 60; + + // this field holds the integral second and the milli-of-second + private final long millisecond; + + // this field holds the nano-of-millisecond + private final int nanoOfMillisecond; + + public Timestamp(long millisecond, int nanoOfMillisecond) { + Preconditions.checkArgument(nanoOfMillisecond >= 0 && nanoOfMillisecond <= 999_999); + this.millisecond = millisecond; + this.nanoOfMillisecond = nanoOfMillisecond; + } + + @Override + public int compareTo(Timestamp that) { + int cmp = Long.compare(this.millisecond, that.millisecond); + if (cmp == 0) { + cmp = this.nanoOfMillisecond - that.nanoOfMillisecond; + } + return cmp; + } + + @Override + public boolean equals(Object obj) { + if (!(obj instanceof Timestamp)) { + return false; + } + Timestamp that = (Timestamp) obj; + return this.millisecond == that.millisecond && + this.nanoOfMillisecond == that.nanoOfMillisecond; + } + + @Override + public String toString() { + return toLocalDateTime().toString(); + } + + @Override + public int hashCode() { + int ret = (int) millisecond ^ (int) (millisecond >> 32); + return 31 * ret + nanoOfMillisecond; + } + + public long getMillisecond() { + return millisecond; + } + + public int getNanoOfMillisecond() { + return nanoOfMillisecond; + } + + /** + * Obtains an instance of {@code Timestamp} from a millisecond. + * + * <p>This returns a {@code Timestamp} with the specified millisecond. + * The nanoOfMillisecond field will be set to zero. + * + * @param millisecond the number of milliseconds since January 1, 1970, 00:00:00 GMT + * A negative number is the number of milliseconds before + * January 1, 1970, 00:00:00 GMT + * @param precision the precision of fractional seconds + * @return an instance of {@code Timestamp} + */ + public static Timestamp fromLong(long millisecond, int precision) { + long milli = isCompact(precision) ? + zeroLastNDigits(millisecond, 3 - precision) : millisecond; + return new Timestamp(milli, 0); + } + + /** + * Convert this {@code Timestmap} object to a {@link java.sql.Timestamp}. + * + * @return An instance of {@link java.sql.Timestamp} + */ + public java.sql.Timestamp toTimestamp() { + return java.sql.Timestamp.valueOf(toLocalDateTime()); + } + + /** + * Obtains an instance of {@code Timestamp} from an instance of {@link java.sql.Timestamp}. + * + * <p>This returns a {@code Timestamp} with the specified {@link java.sql.Timestamp}. + * + * @param ts an instance of {@link java.sql.Timestamp} + * @param precision the precision of fractional seconds + * @return an instance of {@code Timestamp} + */ + public static Timestamp fromTimestamp(java.sql.Timestamp ts, int precision) { + return fromLocalDateTime(ts.toLocalDateTime(), precision); + } + + /** + * Convert this {@code Timestamp} object to a {@link LocalDateTime}. + * + * @return An instance of {@link LocalDateTime} + */ + public LocalDateTime toLocalDateTime() { + int date = (int) (millisecond / MILLIS_PER_DAY); + int time = (int) (millisecond % MILLIS_PER_DAY); + if (time < 0) { + --date; + time += MILLIS_PER_DAY; + } + + int hour = time / (int) MILLIS_PER_HOUR; Review comment: Just misunderstand it. rollbacking. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. 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