| /* |
| * 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.planner.sql.handlers; |
| |
| import java.util.Collection; |
| import java.util.Comparator; |
| import java.util.HashMap; |
| import java.util.Map; |
| import java.util.Optional; |
| import java.util.TreeSet; |
| |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.RelShuttleImpl; |
| import org.apache.calcite.rel.core.TableModify; |
| import org.apache.calcite.rel.core.TableScan; |
| import org.apache.calcite.rel.logical.LogicalTableModify; |
| import org.apache.calcite.tools.RuleSet; |
| import org.apache.drill.common.util.function.CheckedSupplier; |
| import org.apache.drill.exec.ops.QueryContext; |
| import org.apache.drill.exec.planner.PlannerPhase; |
| import org.apache.drill.exec.planner.common.DrillRelOptUtil; |
| import org.apache.drill.exec.planner.logical.DrillTable; |
| import org.apache.drill.exec.planner.sql.SchemaUtilities; |
| import org.apache.drill.exec.planner.sql.conversion.SqlConverter; |
| import org.apache.drill.exec.store.StoragePlugin; |
| import org.apache.drill.exec.store.StoragePluginRegistry; |
| |
| public class SqlHandlerConfig { |
| |
| private final QueryContext context; |
| private final SqlConverter converter; |
| private Map<RelNode, Collection<StoragePlugin>> scannedPluginCache = new HashMap<>(); |
| |
| public SqlHandlerConfig(QueryContext context, SqlConverter converter) { |
| this.context = context; |
| this.converter = converter; |
| } |
| |
| public QueryContext getContext() { |
| return context; |
| } |
| |
| public RuleSet getRules(PlannerPhase phase, RelNode input) { |
| return phase.getRules(context, getScannedPlugins(input)); |
| } |
| |
| public Collection<StoragePlugin> getScannedPlugins(RelNode input) { |
| Collection<StoragePlugin> scannedPlugins = scannedPluginCache.get(input); |
| if (scannedPlugins == null) { |
| // Compute and cache for subsequent calls. |
| PluginsCollector pluginsCollector = new PluginsCollector(context.getStorage()); |
| input.accept(pluginsCollector); |
| scannedPlugins = pluginsCollector.getPlugins(); |
| scannedPluginCache.put(input, scannedPlugins); |
| } |
| |
| return scannedPlugins; |
| } |
| |
| public SqlConverter getConverter() { |
| return converter; |
| } |
| |
| public static class PluginsCollector extends RelShuttleImpl { |
| // A TreeSet that compares plugins by name to remove duplicates and sort |
| // alphabetically. |
| private final TreeSet<StoragePlugin> plugins = new TreeSet<>( |
| Comparator.comparing(StoragePlugin::getName) |
| ); |
| private final StoragePluginRegistry storagePlugins; |
| |
| public PluginsCollector(StoragePluginRegistry storagePlugins) { |
| this.storagePlugins = storagePlugins; |
| } |
| |
| @Override |
| public RelNode visit(TableScan scan) { |
| collectPlugins(scan); |
| return scan; |
| } |
| |
| @Override |
| public RelNode visit(LogicalTableModify modify) { |
| collectPlugins(modify); |
| return visitChildren(modify); |
| } |
| |
| @Override |
| public RelNode visit(RelNode other) { |
| if (other instanceof TableModify) { |
| collectPlugins(other); |
| } |
| return super.visit(other); |
| } |
| |
| private void collectPlugins(RelNode relNode) { |
| String pluginName = SchemaUtilities.getSchemaPathAsList( |
| relNode.getTable().getQualifiedName().iterator().next()).iterator().next(); |
| CheckedSupplier<StoragePlugin, StoragePluginRegistry.PluginException> pluginsProvider = |
| () -> storagePlugins.getPlugin(pluginName); |
| |
| StoragePlugin storagePlugin = Optional.ofNullable(DrillRelOptUtil.getDrillTable(relNode)) |
| .map(DrillTable::getPlugin) |
| .orElseGet(pluginsProvider); |
| plugins.add(storagePlugin); |
| } |
| |
| /** |
| * @return A deduplicated collection of storage plugins scanned by the query. |
| */ |
| public Collection<StoragePlugin> getPlugins() { |
| return plugins; |
| } |
| } |
| } |