/*
* Licensed 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 com.facebook.presto.type;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.function.IsNull;
import com.facebook.presto.spi.function.LiteralParameters;
import com.facebook.presto.spi.function.ScalarFunction;
import com.facebook.presto.spi.function.ScalarOperator;
import com.facebook.presto.spi.function.SqlType;
import com.facebook.presto.spi.type.AbstractIntType;
import com.facebook.presto.spi.type.StandardTypes;
import io.airlift.slice.Slice;
import org.joda.time.chrono.ISOChronology;
import java.util.concurrent.TimeUnit;
import static com.facebook.presto.spi.StandardErrorCode.INVALID_CAST_ARGUMENT;
import static com.facebook.presto.spi.function.OperatorType.BETWEEN;
import static com.facebook.presto.spi.function.OperatorType.CAST;
import static com.facebook.presto.spi.function.OperatorType.EQUAL;
import static com.facebook.presto.spi.function.OperatorType.GREATER_THAN;
import static com.facebook.presto.spi.function.OperatorType.GREATER_THAN_OR_EQUAL;
import static com.facebook.presto.spi.function.OperatorType.HASH_CODE;
import static com.facebook.presto.spi.function.OperatorType.IS_DISTINCT_FROM;
import static com.facebook.presto.spi.function.OperatorType.LESS_THAN;
import static com.facebook.presto.spi.function.OperatorType.LESS_THAN_OR_EQUAL;
import static com.facebook.presto.spi.function.OperatorType.NOT_EQUAL;
import static com.facebook.presto.spi.type.DateTimeEncoding.packDateTimeWithZone;
import static com.facebook.presto.util.DateTimeUtils.parseDate;
import static com.facebook.presto.util.DateTimeUtils.printDate;
import static com.facebook.presto.util.DateTimeZoneIndex.getChronology;
import static io.airlift.slice.SliceUtf8.trim;
import static io.airlift.slice.Slices.utf8Slice;
public final class DateOperators
{
private DateOperators()
{
}
@ScalarOperator(EQUAL)
@SqlType(StandardTypes.BOOLEAN)
public static boolean equal(@SqlType(StandardTypes.DATE) long left, @SqlType(StandardTypes.DATE) long right)
{
return left == right;
}
@ScalarOperator(NOT_EQUAL)
@SqlType(StandardTypes.BOOLEAN)
public static boolean notEqual(@SqlType(StandardTypes.DATE) long left, @SqlType(StandardTypes.DATE) long right)
{
return left != right;
}
@ScalarOperator(LESS_THAN)
@SqlType(StandardTypes.BOOLEAN)
public static boolean lessThan(@SqlType(StandardTypes.DATE) long left, @SqlType(StandardTypes.DATE) long right)
{
return left < right;
}
@ScalarOperator(LESS_THAN_OR_EQUAL)
@SqlType(StandardTypes.BOOLEAN)
public static boolean lessThanOrEqual(@SqlType(StandardTypes.DATE) long left, @SqlType(StandardTypes.DATE) long right)
{
return left <= right;
}
@ScalarOperator(GREATER_THAN)
@SqlType(StandardTypes.BOOLEAN)
public static boolean greaterThan(@SqlType(StandardTypes.DATE) long left, @SqlType(StandardTypes.DATE) long right)
{
return left > right;
}
@ScalarOperator(GREATER_THAN_OR_EQUAL)
@SqlType(StandardTypes.BOOLEAN)
public static boolean greaterThanOrEqual(@SqlType(StandardTypes.DATE) long left, @SqlType(StandardTypes.DATE) long right)
{
return left >= right;
}
@ScalarOperator(BETWEEN)
@SqlType(StandardTypes.BOOLEAN)
public static boolean between(@SqlType(StandardTypes.DATE) long value, @SqlType(StandardTypes.DATE) long min, @SqlType(StandardTypes.DATE) long max)
{
return min <= value && value <= max;
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.TIMESTAMP)
public static long castToTimestamp(ConnectorSession session, @SqlType(StandardTypes.DATE) long value)
{
long utcMillis = TimeUnit.DAYS.toMillis(value);
// date is encoded as milliseconds at midnight in UTC
// convert to midnight if the session timezone
ISOChronology chronology = getChronology(session.getTimeZoneKey());
return utcMillis - chronology.getZone().getOffset(utcMillis);
}
@ScalarOperator(CAST)
@SqlType(StandardTypes.TIMESTAMP_WITH_TIME_ZONE)
public static long castToTimestampWithTimeZone(ConnectorSession session, @SqlType(StandardTypes.DATE) long value)
{
long utcMillis = TimeUnit.DAYS.toMillis(value);
// date is encoded as milliseconds at midnight in UTC
// convert to midnight if the session timezone
ISOChronology chronology = getChronology(session.getTimeZoneKey());
long millis = utcMillis - chronology.getZone().getOffset(utcMillis);
return packDateTimeWithZone(millis, session.getTimeZoneKey());
}
@ScalarOperator(CAST)
@LiteralParameters("x")
@SqlType("varchar(x)")
public static Slice castToSlice(@SqlType(StandardTypes.DATE) long value)
{
return utf8Slice(printDate((int) value));
}
@ScalarFunction("date")
@ScalarOperator(CAST)
@LiteralParameters("x")
@SqlType(StandardTypes.DATE)
public static long castFromSlice(@SqlType("varchar(x)") Slice value)
{
try {
return parseDate(trim(value).toStringUtf8());
}
catch (IllegalArgumentException e) {
throw new PrestoException(INVALID_CAST_ARGUMENT, "Value cannot be cast to date: " + value.toStringUtf8(), e);
}
}
@ScalarOperator(HASH_CODE)
@SqlType(StandardTypes.BIGINT)
public static long hashCode(@SqlType(StandardTypes.DATE) long value)
{
return AbstractIntType.hash((int) value);
}
@ScalarOperator(IS_DISTINCT_FROM)
@SqlType(StandardTypes.BOOLEAN)
public static boolean isDistinctFrom(
@SqlType(StandardTypes.DATE) long left,
@IsNull boolean leftNull,
@SqlType(StandardTypes.DATE) long right,
@IsNull boolean rightNull)
{
if (leftNull != rightNull) {
return true;
}
if (leftNull) {
return false;
}
return notEqual(left, right);
}
}