/*
* 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.operator.scalar.ScalarOperator;
import com.facebook.presto.spi.ConnectorSession;
import com.facebook.presto.spi.PrestoException;
import com.facebook.presto.spi.type.BooleanType;
import com.facebook.presto.spi.type.DateType;
import com.facebook.presto.spi.type.TimeType;
import com.facebook.presto.spi.type.TimeWithTimeZoneType;
import com.facebook.presto.spi.type.TimestampType;
import com.facebook.presto.spi.type.TimestampWithTimeZoneType;
import com.facebook.presto.spi.type.VarcharType;
import io.airlift.slice.Slice;
import io.airlift.slice.Slices;
import org.joda.time.chrono.ISOChronology;
import static com.facebook.presto.metadata.OperatorInfo.OperatorType.BETWEEN;
import static com.facebook.presto.metadata.OperatorInfo.OperatorType.CAST;
import static com.facebook.presto.metadata.OperatorInfo.OperatorType.EQUAL;
import static com.facebook.presto.metadata.OperatorInfo.OperatorType.GREATER_THAN;
import static com.facebook.presto.metadata.OperatorInfo.OperatorType.GREATER_THAN_OR_EQUAL;
import static com.facebook.presto.metadata.OperatorInfo.OperatorType.HASH_CODE;
import static com.facebook.presto.metadata.OperatorInfo.OperatorType.LESS_THAN;
import static com.facebook.presto.metadata.OperatorInfo.OperatorType.LESS_THAN_OR_EQUAL;
import static com.facebook.presto.metadata.OperatorInfo.OperatorType.NOT_EQUAL;
import static com.facebook.presto.spi.StandardErrorCode.INVALID_CAST_ARGUMENT;
import static com.facebook.presto.spi.type.DateTimeEncoding.packDateTimeWithZone;
import static com.facebook.presto.type.DateTimeOperators.modulo24Hour;
import static com.facebook.presto.util.DateTimeUtils.parseTimestampWithoutTimeZone;
import static com.facebook.presto.util.DateTimeUtils.printTimestampWithoutTimeZone;
import static com.facebook.presto.util.DateTimeZoneIndex.getChronology;
import static java.nio.charset.StandardCharsets.UTF_8;
public final class TimestampOperators
{
private TimestampOperators()
{
}
@ScalarOperator(EQUAL)
@SqlType(BooleanType.class)
public static boolean equal(@SqlType(TimestampType.class) long left, @SqlType(TimestampType.class) long right)
{
return left == right;
}
@ScalarOperator(NOT_EQUAL)
@SqlType(BooleanType.class)
public static boolean notEqual(@SqlType(TimestampType.class) long left, @SqlType(TimestampType.class) long right)
{
return left != right;
}
@ScalarOperator(LESS_THAN)
@SqlType(BooleanType.class)
public static boolean lessThan(@SqlType(TimestampType.class) long left, @SqlType(TimestampType.class) long right)
{
return left < right;
}
@ScalarOperator(LESS_THAN_OR_EQUAL)
@SqlType(BooleanType.class)
public static boolean lessThanOrEqual(@SqlType(TimestampType.class) long left, @SqlType(TimestampType.class) long right)
{
return left <= right;
}
@ScalarOperator(GREATER_THAN)
@SqlType(BooleanType.class)
public static boolean greaterThan(@SqlType(TimestampType.class) long left, @SqlType(TimestampType.class) long right)
{
return left > right;
}
@ScalarOperator(GREATER_THAN_OR_EQUAL)
@SqlType(BooleanType.class)
public static boolean greaterThanOrEqual(@SqlType(TimestampType.class) long left, @SqlType(TimestampType.class) long right)
{
return left >= right;
}
@ScalarOperator(BETWEEN)
@SqlType(BooleanType.class)
public static boolean between(@SqlType(TimestampType.class) long value, @SqlType(TimestampType.class) long min, @SqlType(TimestampType.class) long max)
{
return min <= value && value <= max;
}
@ScalarOperator(CAST)
@SqlType(DateType.class)
public static long castToDate(ConnectorSession session, @SqlType(TimestampType.class) long value)
{
// round down the current timestamp to days
ISOChronology chronology = getChronology(session.getTimeZoneKey());
long date = chronology.dayOfYear().roundFloor(value);
// date is currently midnight in timezone of the session
// convert to UTC
return date + chronology.getZone().getOffset(date);
}
@ScalarOperator(CAST)
@SqlType(TimeType.class)
public static long castToTime(ConnectorSession session, @SqlType(TimestampType.class) long value)
{
return modulo24Hour(getChronology(session.getTimeZoneKey()), value);
}
@ScalarOperator(CAST)
@SqlType(TimeWithTimeZoneType.class)
public static long castToTimeWithTimeZone(ConnectorSession session, @SqlType(TimestampType.class) long value)
{
int timeMillis = modulo24Hour(getChronology(session.getTimeZoneKey()), value);
return packDateTimeWithZone(timeMillis, session.getTimeZoneKey());
}
@ScalarOperator(CAST)
@SqlType(TimestampWithTimeZoneType.class)
public static long castToTimestampWithTimeZone(ConnectorSession session, @SqlType(TimestampType.class) long value)
{
return packDateTimeWithZone(value, session.getTimeZoneKey());
}
@ScalarOperator(CAST)
@SqlType(VarcharType.class)
public static Slice castToSlice(ConnectorSession session, @SqlType(TimestampType.class) long value)
{
return Slices.copiedBuffer(printTimestampWithoutTimeZone(session.getTimeZoneKey(), value), UTF_8);
}
@ScalarOperator(CAST)
@SqlType(TimestampType.class)
public static long castFromSlice(ConnectorSession session, @SqlType(VarcharType.class) Slice value)
{
try {
return parseTimestampWithoutTimeZone(session.getTimeZoneKey(), value.toStringUtf8());
}
catch (IllegalArgumentException e) {
throw new PrestoException(INVALID_CAST_ARGUMENT.toErrorCode(), e);
}
}
@ScalarOperator(HASH_CODE)
public static int hashCode(@SqlType(TimestampType.class) long value)
{
return (int) (value ^ (value >>> 32));
}
}