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[CALCITE-6449] Enable PostgreSQL implementations of to_date/to_timestamp
* Supports all date/time format patterns of PostreSQL 14 * Oracle will use the existing implementations * Added to_date/to_timestamp tests to PostgreSQL iq file * PostgreSQL to_timestamp function returns TIMESTAMP_TZ that is nullable
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core/src/main/java/org/apache/calcite/util/format/postgresql/ChronoUnitEnum.java
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| /* | ||
| * 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.calcite.util.format.postgresql; | ||
|
|
||
| import com.google.common.collect.ImmutableSet; | ||
|
|
||
| import java.time.temporal.ChronoUnit; | ||
| import java.util.Set; | ||
|
|
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| import static org.apache.calcite.util.format.postgresql.DateCalendarEnum.GREGORIAN; | ||
| import static org.apache.calcite.util.format.postgresql.DateCalendarEnum.ISO_8601; | ||
| import static org.apache.calcite.util.format.postgresql.DateCalendarEnum.JULIAN; | ||
| import static org.apache.calcite.util.format.postgresql.DateCalendarEnum.NONE; | ||
|
|
||
| /** | ||
| * A component of a datetime. May belong to a type of calendar. Also contains | ||
| * a list of parent values. For example months are in a year. A datetime can be | ||
| * reconstructed from one or more <code>ChronUnitEnum</code> items along with | ||
| * their associated values. | ||
| * | ||
| * <p>Some <code>ChronoUnitEnum</code> items conflict with others. | ||
| */ | ||
| public enum ChronoUnitEnum { | ||
| ERAS(ChronoUnit.ERAS, NONE), | ||
| CENTURIES( | ||
| ChronoUnit.CENTURIES, | ||
| ImmutableSet.of(ISO_8601, GREGORIAN), | ||
| ERAS), | ||
| YEARS_ISO_8601( | ||
| ChronoUnit.YEARS, | ||
| ISO_8601, | ||
| CENTURIES), | ||
| YEARS_IN_MILLENIA_ISO_8601( | ||
| ChronoUnit.YEARS, | ||
| ISO_8601, | ||
| CENTURIES), | ||
| YEARS_IN_CENTURY_ISO_8601( | ||
| ChronoUnit.YEARS, | ||
| ISO_8601, | ||
| CENTURIES), | ||
| DAYS_IN_YEAR_ISO_8601( | ||
| ChronoUnit.DAYS, | ||
| ISO_8601, | ||
| YEARS_ISO_8601), | ||
| WEEKS_IN_YEAR_ISO_8601( | ||
| ChronoUnit.WEEKS, | ||
| ISO_8601, | ||
| YEARS_ISO_8601), | ||
| DAYS_JULIAN( | ||
| ChronoUnit.DAYS, | ||
| JULIAN), | ||
| YEARS( | ||
| ChronoUnit.YEARS, | ||
| GREGORIAN, | ||
| CENTURIES), | ||
| YEARS_IN_MILLENIA( | ||
| ChronoUnit.YEARS, | ||
| GREGORIAN, | ||
| CENTURIES), | ||
| YEARS_IN_CENTURY( | ||
| ChronoUnit.YEARS, | ||
| GREGORIAN, | ||
| CENTURIES), | ||
| MONTHS_IN_YEAR( | ||
| ChronoUnit.MONTHS, | ||
| GREGORIAN, | ||
| YEARS, YEARS_IN_CENTURY), | ||
| DAYS_IN_YEAR( | ||
| ChronoUnit.DAYS, | ||
| GREGORIAN, | ||
| YEARS, YEARS_IN_CENTURY), | ||
| DAYS_IN_MONTH( | ||
| ChronoUnit.DAYS, | ||
| GREGORIAN, | ||
| MONTHS_IN_YEAR), | ||
| WEEKS_IN_YEAR( | ||
| ChronoUnit.WEEKS, | ||
| GREGORIAN, | ||
| YEARS, YEARS_IN_CENTURY), | ||
| WEEKS_IN_MONTH( | ||
| ChronoUnit.WEEKS, | ||
| GREGORIAN, | ||
| MONTHS_IN_YEAR), | ||
| DAYS_IN_WEEK( | ||
| ChronoUnit.DAYS, | ||
| NONE, | ||
| YEARS_ISO_8601, WEEKS_IN_MONTH, WEEKS_IN_YEAR), | ||
| HOURS_IN_DAY( | ||
| ChronoUnit.HOURS, | ||
| NONE, | ||
| DAYS_IN_YEAR, DAYS_IN_MONTH, DAYS_IN_WEEK), | ||
| HALF_DAYS( | ||
| ChronoUnit.HALF_DAYS, | ||
| NONE, | ||
| DAYS_IN_YEAR, DAYS_IN_MONTH, DAYS_IN_WEEK), | ||
| HOURS_IN_HALF_DAY( | ||
| ChronoUnit.HOURS, | ||
| NONE, | ||
| HALF_DAYS), | ||
| MINUTES_IN_HOUR( | ||
| ChronoUnit.MINUTES, | ||
| NONE, | ||
| HOURS_IN_DAY, HOURS_IN_HALF_DAY), | ||
| SECONDS_IN_DAY( | ||
| ChronoUnit.SECONDS, | ||
| NONE, | ||
| DAYS_IN_YEAR, DAYS_IN_MONTH, DAYS_IN_WEEK), | ||
| SECONDS_IN_MINUTE( | ||
| ChronoUnit.SECONDS, | ||
| NONE, | ||
| MINUTES_IN_HOUR), | ||
| MILLIS( | ||
| ChronoUnit.MILLIS, | ||
| NONE, | ||
| SECONDS_IN_DAY, SECONDS_IN_MINUTE), | ||
| MICROS( | ||
| ChronoUnit.MICROS, | ||
| NONE, | ||
| MILLIS), | ||
| TENTHS_OF_SECOND( | ||
| ChronoUnit.MILLIS, | ||
| NONE, | ||
| SECONDS_IN_DAY, SECONDS_IN_MINUTE), | ||
| HUNDREDTHS_OF_SECOND( | ||
| ChronoUnit.MILLIS, | ||
| NONE, | ||
| SECONDS_IN_DAY, SECONDS_IN_MINUTE), | ||
| THOUSANDTHS_OF_SECOND( | ||
| ChronoUnit.MILLIS, | ||
| NONE, | ||
| SECONDS_IN_DAY, SECONDS_IN_MINUTE), | ||
| TENTHS_OF_MS( | ||
| ChronoUnit.MICROS, | ||
| NONE, | ||
| SECONDS_IN_DAY, SECONDS_IN_MINUTE), | ||
| HUNDREDTHS_OF_MS( | ||
| ChronoUnit.MICROS, | ||
| NONE, | ||
| SECONDS_IN_DAY, SECONDS_IN_MINUTE), | ||
| THOUSANDTHS_OF_MS( | ||
| ChronoUnit.MICROS, | ||
| NONE, | ||
| SECONDS_IN_DAY, SECONDS_IN_MINUTE), | ||
| TIMEZONE_HOURS( | ||
| ChronoUnit.HOURS, | ||
| NONE), | ||
| TIMEZONE_MINUTES( | ||
| ChronoUnit.MINUTES, | ||
| NONE, | ||
| TIMEZONE_HOURS); | ||
|
|
||
| private final ChronoUnit chronoUnit; | ||
| private final ImmutableSet<ChronoUnitEnum> parentUnits; | ||
| private final ImmutableSet<DateCalendarEnum> calendars; | ||
|
|
||
| ChronoUnitEnum(ChronoUnit chronoUnit, DateCalendarEnum calendar, | ||
| ChronoUnitEnum... parentUnits) { | ||
| this.chronoUnit = chronoUnit; | ||
| this.parentUnits = ImmutableSet.copyOf(parentUnits); | ||
| this.calendars = ImmutableSet.of(calendar); | ||
| } | ||
|
|
||
| ChronoUnitEnum(ChronoUnit chronoUnit, Set<DateCalendarEnum> calendars, | ||
| ChronoUnitEnum... parentUnits) { | ||
| this.chronoUnit = chronoUnit; | ||
| this.parentUnits = ImmutableSet.copyOf(parentUnits); | ||
| this.calendars = ImmutableSet.<DateCalendarEnum>builder().addAll(calendars).build(); | ||
| } | ||
|
|
||
| /** | ||
| * Get the ChronoUnit value that corresponds to this value. | ||
| * | ||
| * @return a ChronoUnit value | ||
| */ | ||
| public ChronoUnit getChronoUnit() { | ||
| return chronoUnit; | ||
| } | ||
|
|
||
| /** | ||
| * Get the set of calendars that this value can be in. | ||
| * | ||
| * @return set of calendars that this value can be in | ||
| */ | ||
| public Set<DateCalendarEnum> getCalendars() { | ||
| return calendars; | ||
| } | ||
|
|
||
| /** | ||
| * Checks if the current item can be added to <code>units</code> without causing | ||
| * any conflicts. | ||
| * | ||
| * @param units a <code>Set</code> of items to test against | ||
| * @return <code>true</code> if this item does not conflict with <code>units</code> | ||
| */ | ||
| public boolean isCompatible(Set<ChronoUnitEnum> units) { | ||
| if (!calendars.isEmpty()) { | ||
| for (ChronoUnitEnum unit : units) { | ||
| boolean haveCompatibleCalendar = false; | ||
|
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| for (DateCalendarEnum unitCalendar : unit.getCalendars()) { | ||
| for (DateCalendarEnum calendar : calendars) { | ||
| if (unitCalendar == NONE || calendar == NONE | ||
| || unitCalendar.isCalendarCompatible(calendar)) { | ||
| haveCompatibleCalendar = true; | ||
| break; | ||
| } | ||
| } | ||
|
|
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| if (haveCompatibleCalendar) { | ||
| break; | ||
| } | ||
| } | ||
|
|
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| if (!haveCompatibleCalendar) { | ||
| return false; | ||
| } | ||
| } | ||
| } | ||
|
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| for (ChronoUnitEnum unit : units) { | ||
| if (parentUnits.equals(unit.parentUnits)) { | ||
| return false; | ||
| } | ||
| } | ||
|
|
||
| return true; | ||
| } | ||
| } |
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