io.trino.operator.scalar.timetz.DateDiff Maven / Gradle / Ivy
/*
* 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 io.trino.operator.scalar.timetz;
import io.airlift.slice.Slice;
import io.trino.spi.TrinoException;
import io.trino.spi.function.Description;
import io.trino.spi.function.LiteralParameters;
import io.trino.spi.function.ScalarFunction;
import io.trino.spi.function.SqlType;
import io.trino.spi.type.LongTimeWithTimeZone;
import io.trino.spi.type.StandardTypes;
import static io.trino.operator.scalar.timetz.TimeWithTimeZoneOperators.normalize;
import static io.trino.spi.StandardErrorCode.INVALID_FUNCTION_ARGUMENT;
import static io.trino.type.DateTimes.NANOSECONDS_PER_HOUR;
import static io.trino.type.DateTimes.NANOSECONDS_PER_MILLISECOND;
import static io.trino.type.DateTimes.NANOSECONDS_PER_MINUTE;
import static io.trino.type.DateTimes.NANOSECONDS_PER_SECOND;
import static io.trino.type.DateTimes.PICOSECONDS_PER_HOUR;
import static io.trino.type.DateTimes.PICOSECONDS_PER_MILLISECOND;
import static io.trino.type.DateTimes.PICOSECONDS_PER_MINUTE;
import static io.trino.type.DateTimes.PICOSECONDS_PER_SECOND;
import static java.util.Locale.ENGLISH;
@Description("Difference of the given times in the given unit")
@ScalarFunction("date_diff")
public class DateDiff
{
private DateDiff() {}
@LiteralParameters({"x", "p"})
@SqlType(StandardTypes.BIGINT)
public static long diff(
@SqlType("varchar(x)") Slice unit,
@SqlType("time(p) with time zone") long left,
@SqlType("time(p) with time zone") long right)
{
long nanos = normalize(right) - normalize(left);
String unitString = unit.toStringUtf8().toLowerCase(ENGLISH);
switch (unitString) {
case "millisecond":
return nanos / NANOSECONDS_PER_MILLISECOND;
case "second":
return nanos / NANOSECONDS_PER_SECOND;
case "minute":
return nanos / NANOSECONDS_PER_MINUTE;
case "hour":
return nanos / NANOSECONDS_PER_HOUR;
default:
throw new TrinoException(INVALID_FUNCTION_ARGUMENT, "'" + unitString + "' is not a valid TIME field");
}
}
@LiteralParameters({"x", "p"})
@SqlType(StandardTypes.BIGINT)
public static long diff(
@SqlType("varchar(x)") Slice unit,
@SqlType("time(p) with time zone") LongTimeWithTimeZone left,
@SqlType("time(p) with time zone") LongTimeWithTimeZone right)
{
long picos = normalize(right) - normalize(left);
String unitString = unit.toStringUtf8().toLowerCase(ENGLISH);
switch (unitString) {
case "millisecond":
return picos / PICOSECONDS_PER_MILLISECOND;
case "second":
return picos / PICOSECONDS_PER_SECOND;
case "minute":
return picos / PICOSECONDS_PER_MINUTE;
case "hour":
return picos / PICOSECONDS_PER_HOUR;
default:
throw new TrinoException(INVALID_FUNCTION_ARGUMENT, "'" + unitString + "' is not a TIME field");
}
}
}