MaxGekk commented on a change in pull request #25981: [SPARK-28420][SQL] Support the `INTERVAL` type in `date_part()` URL: https://github.com/apache/spark/pull/25981#discussion_r331809580
########## File path: sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/util/IntervalUtils.scala ########## @@ -0,0 +1,91 @@ +/* + * 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.spark.sql.catalyst.util + +import org.apache.spark.sql.types.Decimal +import org.apache.spark.unsafe.types.CalendarInterval + +object IntervalUtils { + val MONTHS_PER_YEAR: Int = 12 + val MONTHS_PER_QUARTER: Byte = 3 + val YEARS_PER_MILLENNIUM: Int = 1000 + val YEARS_PER_CENTURY: Int = 100 + val YEARS_PER_DECADE: Int = 10 + val MICROS_PER_HOUR: Long = DateTimeUtils.MILLIS_PER_HOUR * DateTimeUtils.MICROS_PER_MILLIS + val MICROS_PER_MINUTE: Long = DateTimeUtils.MILLIS_PER_MINUTE * DateTimeUtils.MICROS_PER_MILLIS + val DAYS_PER_MONTH: Byte = 30 + val MICROS_PER_MONTH: Long = DAYS_PER_MONTH * DateTimeUtils.SECONDS_PER_DAY + /* 365.25 days per year assumes leap year every four years */ + val MICROS_PER_YEAR: Long = (36525L * DateTimeUtils.MICROS_PER_DAY) / 100 + + def getYears(interval: CalendarInterval): Int = { + interval.months / MONTHS_PER_YEAR + } + + def getMillenniums(interval: CalendarInterval): Int = { + getYears(interval) / YEARS_PER_MILLENNIUM + } + + def getCenturies(interval: CalendarInterval): Int = { + getYears(interval) / YEARS_PER_CENTURY + } + + def getDecades(interval: CalendarInterval): Int = { + getYears(interval) / YEARS_PER_DECADE + } + + def getMonths(interval: CalendarInterval): Byte = { + (interval.months % MONTHS_PER_YEAR).toByte + } + + def getQuarters(interval: CalendarInterval): Byte = { + (getMonths(interval) / MONTHS_PER_QUARTER + 1).toByte + } + + def getDays(interval: CalendarInterval): Long = { + interval.microseconds / DateTimeUtils.MICROS_PER_DAY + } + + def getHours(interval: CalendarInterval): Byte = { + ((interval.microseconds % DateTimeUtils.MICROS_PER_DAY) / MICROS_PER_HOUR).toByte + } + + def getMinutes(interval: CalendarInterval): Byte = { + ((interval.microseconds % MICROS_PER_HOUR) / MICROS_PER_MINUTE).toByte + } + + def getMicroseconds(interval: CalendarInterval): Long = { + interval.microseconds % MICROS_PER_MINUTE + } + + def getSeconds(interval: CalendarInterval): Decimal = { + Decimal(getMicroseconds(interval), 8, 6) + } + + def getMilliseconds(interval: CalendarInterval): Decimal = { + Decimal(getMicroseconds(interval), 8, 3) + } + + // Returns total number of seconds with microseconds fractional part in the given interval. + def getEpoch(interval: CalendarInterval): Decimal = { Review comment: This implemented as in PostgreSQL https://github.com/postgres/postgres/blob/bffe1bd68457e43925c362d8728ce3b25bdf1c94/src/backend/utils/adt/timestamp.c#L5016-L5022 ---------------------------------------------------------------- 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 --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
