lowka commented on code in PR #3187: URL: https://github.com/apache/ignite-3/pull/3187#discussion_r1494226611
########## modules/sql-engine/src/main/java/org/apache/ignite/internal/sql/engine/prepare/pruning/PartitionPrunerImpl.java: ########## @@ -0,0 +1,220 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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 org.apache.ignite.internal.sql.engine.prepare.pruning; + +import it.unimi.dsi.fastutil.longs.Long2ObjectArrayMap; +import it.unimi.dsi.fastutil.longs.Long2ObjectMap; +import it.unimi.dsi.fastutil.longs.Long2ObjectMap.Entry; +import java.util.ArrayList; +import java.util.List; +import org.apache.ignite.internal.sql.engine.exec.mapping.ColocationGroup; +import org.apache.ignite.internal.sql.engine.exec.mapping.MappedFragment; +import org.apache.ignite.internal.sql.engine.prepare.Fragment; +import org.apache.ignite.internal.sql.engine.prepare.IgniteRelShuttle; +import org.apache.ignite.internal.sql.engine.rel.IgniteReceiver; +import org.apache.ignite.internal.sql.engine.rel.IgniteRel; +import org.apache.ignite.internal.sql.engine.rel.IgniteSender; +import org.apache.ignite.internal.sql.engine.schema.IgniteTable; +import org.jetbrains.annotations.Nullable; + +/** Applies partition pruning. */ +public class PartitionPrunerImpl implements PartitionPruner { + + /** Constructor. */ + public PartitionPrunerImpl() { + + } + + /** {@inheritDoc} */ + @Override + public List<MappedFragment> apply( + List<MappedFragment> mappedFragments, + Object[] dynamicParameters + ) { + List<MappedFragment> updatedFragments = new ArrayList<>(mappedFragments.size()); + Long2ObjectMap<List<String>> newNodesByExchangeId = new Long2ObjectArrayMap<>(); + + // Partition pruning (PP). For each fragment: + // + // 1. Extract PP metadata from each fragment's root in the form of [colo_col1=<val>, ..] (see PartitionPruningMetadataExtractor) + // + // 2. If PP metadata exists then update fragment's colocation group + // to retain partition that are necessary to perform an operator (e.g. for a scan operator such + // partitions only include that ones that can contain data). + // + // Iterate over fragments again to update fragments that receive data from fragments updated at step 2. + // This is accomplished by updating `sourcesByExchangeId`. + // + + PartitionPruningMetadataExtractor extractor = new PartitionPruningMetadataExtractor(); + + for (MappedFragment mappedFragment : mappedFragments) { + // Fragment that contains colocated operators has exactly one colocation group. + // Do not attempt to apply PP to other fragments. Review Comment: Removed. This is not important. ########## modules/sql-engine/src/main/java/org/apache/ignite/internal/sql/engine/prepare/pruning/PartitionPrunerImpl.java: ########## @@ -0,0 +1,220 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You 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 org.apache.ignite.internal.sql.engine.prepare.pruning; + +import it.unimi.dsi.fastutil.longs.Long2ObjectArrayMap; +import it.unimi.dsi.fastutil.longs.Long2ObjectMap; +import it.unimi.dsi.fastutil.longs.Long2ObjectMap.Entry; +import java.util.ArrayList; +import java.util.List; +import org.apache.ignite.internal.sql.engine.exec.mapping.ColocationGroup; +import org.apache.ignite.internal.sql.engine.exec.mapping.MappedFragment; +import org.apache.ignite.internal.sql.engine.prepare.Fragment; +import org.apache.ignite.internal.sql.engine.prepare.IgniteRelShuttle; +import org.apache.ignite.internal.sql.engine.rel.IgniteReceiver; +import org.apache.ignite.internal.sql.engine.rel.IgniteRel; +import org.apache.ignite.internal.sql.engine.rel.IgniteSender; +import org.apache.ignite.internal.sql.engine.schema.IgniteTable; +import org.jetbrains.annotations.Nullable; + +/** Applies partition pruning. */ +public class PartitionPrunerImpl implements PartitionPruner { + + /** Constructor. */ + public PartitionPrunerImpl() { Review Comment: Fixed. -- This is an automated message from the Apache Git Service. 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