jacktengg commented on code in PR #66761: URL: https://github.com/apache/doris/pull/66761#discussion_r3849420726
########## fe/fe-core/src/main/java/org/apache/doris/nereids/types/TimeStampNsType.java: ########## @@ -0,0 +1,99 @@ +// 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.doris.nereids.types; + +import org.apache.doris.catalog.ScalarType; +import org.apache.doris.catalog.Type; +import org.apache.doris.nereids.trees.expressions.literal.StringLikeLiteral; +import org.apache.doris.nereids.types.coercion.CharacterType; +import org.apache.doris.nereids.types.coercion.DateLikeType; +import org.apache.doris.nereids.types.coercion.ScaleTimeType; + +import java.time.DateTimeException; +import java.time.LocalDateTime; +import java.time.temporal.ChronoUnit; + +/** + * Timestamp represented as signed nanoseconds since the Unix epoch. + * + * <p>TIMESTAMP_NS is date-like and has a fixed scale, but it is not a DATETIMEV2 precision variant: + * the two types have different physical representations and coercion rules. Keeping it directly under + * {@link DateLikeType} prevents generic DATETIMEV2 code from treating its fixed nanosecond scale as a + * DATETIMEV2 scale.</p> + */ +public final class TimeStampNsType extends DateLikeType implements ScaleTimeType { + public static final int SCALE = ScalarType.TIMESTAMP_NS_SCALE; + public static final TimeStampNsType INSTANCE = new TimeStampNsType(); + + private static final int WIDTH = 8; + + private TimeStampNsType() { + } + + @Override + public boolean isInjectiveCastTo(DataType target) { + return target instanceof TimeStampNsType || target instanceof CharacterType; + } + + @Override + public Type toCatalogDataType() { + return ScalarType.createTimeStampNsType(); + } + + @Override + public ScaleTimeType scaleTypeForType(DataType dataType) { + return INSTANCE; + } + + @Override + public ScaleTimeType forTypeFromString(StringLikeLiteral str) { + return INSTANCE; + } + + @Override + public int getScale() { + return SCALE; + } + + @Override + public int width() { + return WIDTH; + } + + @Override + public double rangeLength(double high, double low) { + if (high == low) { + return 0; + } + if (Double.isInfinite(high) || Double.isInfinite(low)) { + return Double.POSITIVE_INFINITY; + } + try { + LocalDateTime to = toLocalDateTime(high); + LocalDateTime from = toLocalDateTime(low); + return ChronoUnit.SECONDS.between(from, to); Review Comment: 预期行为，datetimev2也是这行为。 -- 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. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
