io.trino.operator.aggregation.IntervalDayToSecondAverageAggregation 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.aggregation;
import io.trino.operator.aggregation.state.LongAndDoubleState;
import io.trino.spi.block.BlockBuilder;
import io.trino.spi.function.AggregationFunction;
import io.trino.spi.function.CombineFunction;
import io.trino.spi.function.InputFunction;
import io.trino.spi.function.OutputFunction;
import io.trino.spi.function.SqlType;
import io.trino.spi.type.StandardTypes;
import static io.trino.type.IntervalDayTimeType.INTERVAL_DAY_TIME;
import static java.lang.Math.round;
@AggregationFunction("avg")
public final class IntervalDayToSecondAverageAggregation
{
private IntervalDayToSecondAverageAggregation() {}
@InputFunction
public static void input(LongAndDoubleState state, @SqlType(StandardTypes.INTERVAL_DAY_TO_SECOND) long value)
{
state.setLong(state.getLong() + 1);
state.setDouble(state.getDouble() + value);
}
@CombineFunction
public static void combine(LongAndDoubleState state, LongAndDoubleState otherState)
{
state.setLong(state.getLong() + otherState.getLong());
state.setDouble(state.getDouble() + otherState.getDouble());
}
@OutputFunction(StandardTypes.INTERVAL_DAY_TO_SECOND)
public static void output(LongAndDoubleState state, BlockBuilder out)
{
long count = state.getLong();
if (count == 0) {
out.appendNull();
}
else {
double value = state.getDouble();
INTERVAL_DAY_TIME.writeLong(out, round(value / count));
}
}
}