io.trino.operator.aggregation.arrayagg.ArrayAggregationState 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.arrayagg;
import io.trino.spi.block.Block;
import io.trino.spi.block.BlockBuilder;
import io.trino.spi.block.ValueBlock;
import io.trino.spi.function.AccumulatorState;
import io.trino.spi.function.AccumulatorStateMetadata;
@AccumulatorStateMetadata(
stateFactoryClass = ArrayAggregationStateFactory.class,
stateSerializerClass = ArrayAggregationStateSerializer.class,
typeParameters = "T",
serializedType = "ARRAY(T)")
public interface ArrayAggregationState
extends AccumulatorState
{
void add(ValueBlock block, int position);
void writeAll(BlockBuilder blockBuilder);
boolean isEmpty();
default void merge(ArrayAggregationState otherState)
{
Block block = ((SingleArrayAggregationState) otherState).removeTempDeserializeBlock();
ValueBlock valueBlock = block.getUnderlyingValueBlock();
for (int position = 0; position < block.getPositionCount(); position++) {
add(valueBlock, block.getUnderlyingValuePosition(position));
}
}
}