io.trino.operator.join.LookupSource 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.join;
import io.trino.annotation.NotThreadSafe;
import io.trino.spi.Page;
import io.trino.spi.PageBuilder;
import java.io.Closeable;
@NotThreadSafe
public interface LookupSource
extends Closeable
{
long getInMemorySizeInBytes();
long getJoinPositionCount();
long joinPositionWithinPartition(long joinPosition);
/**
* The `rawHashes` and `result` arrays are global to the entire processed page (thus, the same size),
* while the `positions` array may hold any number of selected positions from this page
*/
default void getJoinPosition(int[] positions, Page hashChannelsPage, Page allChannelsPage, long[] rawHashes, long[] result)
{
for (int i = 0; i < positions.length; i++) {
result[positions[i]] = getJoinPosition(positions[i], hashChannelsPage, allChannelsPage, rawHashes[positions[i]]);
}
}
long getJoinPosition(int position, Page hashChannelsPage, Page allChannelsPage, long rawHash);
/**
* The `result` array is global to the entire processed page, while the `positions` array may hold
* any number of selected positions from this page
*/
default void getJoinPosition(int[] positions, Page hashChannelsPage, Page allChannelsPage, long[] result)
{
for (int i = 0; i < positions.length; i++) {
result[positions[i]] = getJoinPosition(positions[i], hashChannelsPage, allChannelsPage);
}
}
long getJoinPosition(int position, Page hashChannelsPage, Page allChannelsPage);
long getNextJoinPosition(long currentJoinPosition, int probePosition, Page allProbeChannelsPage);
void appendTo(long position, PageBuilder pageBuilder, int outputChannelOffset);
boolean isJoinPositionEligible(long currentJoinPosition, int probePosition, Page allProbeChannelsPage);
boolean isEmpty();
@Override
void close();
}