io.trino.plugin.deltalake.transactionlog.statistics.DeltaLakeFileStatistics 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.plugin.deltalake.transactionlog.statistics;

import io.trino.plugin.deltalake.DeltaLakeColumnHandle;
import io.trino.plugin.deltalake.transactionlog.CanonicalColumnName;

import java.util.Map;
import java.util.Optional;
import java.util.stream.Stream;

import static com.google.common.collect.ImmutableMap.toImmutableMap;
import static java.util.function.UnaryOperator.identity;

public interface DeltaLakeFileStatistics
{
    Optional getNumRecords();

    Optional> getMinValues();

    Optional> getMaxValues();

    Optional> getNullCount();

    Optional getNullCount(String columnName);

    Optional