| /* |
| * 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.jdbc; |
| |
| import java.util.List; |
| import java.util.Set; |
| import java.util.stream.Collectors; |
| |
| import org.apache.calcite.adapter.jdbc.JdbcConvention; |
| import org.apache.calcite.adapter.jdbc.JdbcRules; |
| import org.apache.calcite.adapter.jdbc.JdbcRules.JdbcFilterRule; |
| import org.apache.calcite.adapter.jdbc.JdbcRules.JdbcProjectRule; |
| import org.apache.calcite.adapter.jdbc.JdbcToEnumerableConverterRule; |
| import org.apache.calcite.linq4j.tree.ConstantUntypedNull; |
| import org.apache.calcite.plan.RelOptPlanner; |
| import org.apache.calcite.plan.RelOptRule; |
| import org.apache.calcite.sql.SqlDialect; |
| import org.apache.drill.exec.planner.RuleInstance; |
| import org.apache.drill.exec.planner.logical.DrillRelFactories; |
| import org.apache.drill.shaded.guava.com.google.common.collect.ImmutableSet; |
| |
| /** |
| * Convention with set of rules to register for jdbc plugin |
| */ |
| class DrillJdbcConvention extends JdbcConvention { |
| |
| /** |
| * Unwanted Calcite's JdbcRules are filtered out using this set |
| */ |
| private static final Set<Class<? extends RelOptRule>> EXCLUDED_CALCITE_RULES = ImmutableSet.of( |
| JdbcToEnumerableConverterRule.class, JdbcFilterRule.class, JdbcProjectRule.class); |
| |
| private final ImmutableSet<RelOptRule> rules; |
| private final JdbcStoragePlugin plugin; |
| |
| DrillJdbcConvention(SqlDialect dialect, String name, JdbcStoragePlugin plugin) { |
| super(dialect, ConstantUntypedNull.INSTANCE, name); |
| this.plugin = plugin; |
| List<RelOptRule> calciteJdbcRules = JdbcRules.rules(this, DrillRelFactories.LOGICAL_BUILDER).stream() |
| .filter(rule -> !EXCLUDED_CALCITE_RULES.contains(rule.getClass())) |
| .collect(Collectors.toList()); |
| this.rules = ImmutableSet.<RelOptRule>builder() |
| .addAll(calciteJdbcRules) |
| .add(JdbcIntermediatePrelConverterRule.INSTANCE) |
| .add(new JdbcDrelConverterRule(this)) |
| .add(new DrillJdbcRuleBase.DrillJdbcProjectRule(this)) |
| .add(new DrillJdbcRuleBase.DrillJdbcFilterRule(this)) |
| .add(RuleInstance.FILTER_SET_OP_TRANSPOSE_RULE) |
| .add(RuleInstance.PROJECT_REMOVE_RULE) |
| .build(); |
| } |
| |
| @Override |
| public void register(RelOptPlanner planner) { |
| rules.forEach(planner::addRule); |
| } |
| |
| Set<RelOptRule> getRules() { |
| return rules; |
| } |
| |
| JdbcStoragePlugin getPlugin() { |
| return plugin; |
| } |
| } |