| /* |
| * 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.drill.exec.store.plan; |
| |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.core.Aggregate; |
| import org.apache.calcite.rel.core.Filter; |
| import org.apache.calcite.rel.core.Join; |
| import org.apache.calcite.rel.core.Project; |
| import org.apache.calcite.rel.core.Sort; |
| import org.apache.calcite.rel.core.TableScan; |
| import org.apache.calcite.rel.core.Union; |
| import org.apache.drill.common.exceptions.UserException; |
| import org.apache.drill.common.util.function.CheckedFunction; |
| import org.apache.drill.exec.physical.base.GroupScan; |
| import org.apache.drill.exec.planner.common.DrillLimitRelBase; |
| import org.apache.drill.exec.planner.common.DrillRelOptUtil; |
| import org.apache.drill.exec.planner.logical.DrillTable; |
| import org.apache.drill.exec.store.StoragePlugin; |
| import org.apache.drill.exec.store.plan.rel.PluginAggregateRel; |
| import org.apache.drill.exec.store.plan.rel.PluginFilterRel; |
| import org.apache.drill.exec.store.plan.rel.PluginJoinRel; |
| import org.apache.drill.exec.store.plan.rel.PluginLimitRel; |
| import org.apache.drill.exec.store.plan.rel.PluginProjectRel; |
| import org.apache.drill.exec.store.plan.rel.PluginSortRel; |
| import org.apache.drill.exec.store.plan.rel.PluginUnionRel; |
| import org.apache.drill.exec.store.plan.rel.StoragePluginTableScan; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.Optional; |
| |
| /** |
| * Abstract base implementation of {@link PluginImplementor} that can be used by |
| * plugin implementors which can support only a subset of all provided operations. |
| */ |
| public abstract class AbstractPluginImplementor implements PluginImplementor { |
| private static final Logger logger = LoggerFactory.getLogger(AbstractPluginImplementor.class); |
| |
| @Override |
| public void implement(PluginAggregateRel aggregate) throws IOException { |
| throw getUnsupported("aggregate"); |
| } |
| |
| @Override |
| public void implement(PluginFilterRel filter) throws IOException { |
| throw getUnsupported("filter"); |
| } |
| |
| @Override |
| public void implement(PluginLimitRel limit) throws IOException { |
| throw getUnsupported("limit"); |
| } |
| |
| @Override |
| public void implement(PluginProjectRel project) throws IOException { |
| throw getUnsupported("project"); |
| } |
| |
| @Override |
| public void implement(PluginSortRel sort) throws IOException { |
| throw getUnsupported("sort"); |
| } |
| |
| @Override |
| public void implement(PluginUnionRel union) throws IOException { |
| throw getUnsupported("union"); |
| } |
| |
| @Override |
| public void implement(PluginJoinRel join) throws IOException { |
| throw getUnsupported("join"); |
| } |
| |
| @Override |
| public void implement(StoragePluginTableScan scan) throws IOException { |
| throw getUnsupported("scan"); |
| } |
| |
| @Override |
| public boolean canImplement(Aggregate aggregate) { |
| return false; |
| } |
| |
| @Override |
| public boolean canImplement(Filter filter) { |
| return false; |
| } |
| |
| @Override |
| public boolean canImplement(DrillLimitRelBase limit) { |
| return false; |
| } |
| |
| @Override |
| public boolean canImplement(Project project) { |
| return false; |
| } |
| |
| @Override |
| public boolean canImplement(Sort sort) { |
| return false; |
| } |
| |
| @Override |
| public boolean canImplement(Union union) { |
| return false; |
| } |
| |
| @Override |
| public boolean canImplement(TableScan scan) { |
| return false; |
| } |
| |
| @Override |
| public boolean canImplement(Join scan) { |
| return false; |
| } |
| |
| @Override |
| public boolean splitProject(Project project) { |
| return false; |
| } |
| |
| @Override |
| public boolean artificialLimit() { |
| return false; |
| } |
| |
| private UserException getUnsupported(String rel) { |
| return UserException.unsupportedError() |
| .message("Plugin implementor doesn't support push down for %s", rel) |
| .build(logger); |
| } |
| |
| protected GroupScan findGroupScan(RelNode node) { |
| CheckedFunction<DrillTable, GroupScan, IOException> groupScanFunction = DrillTable::getGroupScan; |
| return Optional.ofNullable(DrillRelOptUtil.findScan(node)) |
| .map(DrillRelOptUtil::getDrillTable) |
| .filter(this::supportsDrillTable) |
| .map(groupScanFunction) |
| .orElse(null); |
| } |
| |
| private boolean supportsDrillTable(DrillTable table) { |
| return supportedPlugin().isInstance(table.getPlugin()); |
| } |
| |
| protected abstract Class<? extends StoragePlugin> supportedPlugin(); |
| |
| protected abstract boolean hasPluginGroupScan(RelNode node); |
| } |