| /* |
| * 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.spark.sql |
| |
| import org.apache.spark.sql.catalyst.parser.ParserInterface |
| import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan |
| import org.apache.spark.sql.catalyst.rules.Rule |
| import org.apache.spark.sql.execution.strategy.{CarbonLateDecodeStrategy, DDLStrategy, StreamingTableStrategy} |
| import org.apache.spark.sql.hive.{CarbonIUDAnalysisRule, CarbonPreInsertionCasts} |
| import org.apache.spark.sql.parser.CarbonExtensionSqlParser |
| |
| class CarbonExtensions extends ((SparkSessionExtensions) => Unit) { |
| |
| override def apply(extensions: SparkSessionExtensions): Unit = { |
| // Try to initialize MV extension before carbon extension |
| // It may fail if MVExtension class is not in class path |
| try { |
| val clazz = Class.forName("org.apache.carbondata.mv.extension.MVExtension") |
| val method = clazz.getMethod("apply", classOf[SparkSessionExtensions]) |
| val mvExtension = clazz.newInstance() |
| method.invoke(mvExtension, extensions) |
| } catch { |
| case _: Throwable => |
| // If MVExtension initialization failed, ignore it |
| } |
| |
| // Carbon internal parser |
| extensions |
| .injectParser((sparkSession: SparkSession, parser: ParserInterface) => |
| new CarbonExtensionSqlParser(new SQLConf, sparkSession, parser)) |
| |
| // carbon analyzer rules |
| extensions |
| .injectResolutionRule((session: SparkSession) => CarbonIUDAnalysisRule(session)) |
| extensions |
| .injectResolutionRule((session: SparkSession) => CarbonPreInsertionCasts(session)) |
| |
| // carbon optimizer rules |
| extensions.injectPostHocResolutionRule((session: SparkSession) => CarbonOptimizerRule(session)) |
| |
| // carbon planner strategies |
| extensions |
| .injectPlannerStrategy((session: SparkSession) => new StreamingTableStrategy(session)) |
| extensions |
| .injectPlannerStrategy((_: SparkSession) => new CarbonLateDecodeStrategy) |
| extensions |
| .injectPlannerStrategy((session: SparkSession) => new DDLStrategy(session)) |
| |
| // init CarbonEnv |
| CarbonEnv.init() |
| } |
| } |
| |
| case class CarbonOptimizerRule(session: SparkSession) extends Rule[LogicalPlan] { |
| self => |
| |
| var notAdded = true |
| |
| override def apply(plan: LogicalPlan): LogicalPlan = { |
| if (notAdded) { |
| self.synchronized { |
| if (notAdded) { |
| notAdded = false |
| val sessionState = session.sessionState |
| val field = sessionState.getClass.getDeclaredField("optimizer") |
| field.setAccessible(true) |
| field.set(sessionState, |
| new CarbonOptimizer(session, sessionState.catalog, sessionState.optimizer)) |
| } |
| } |
| } |
| plan |
| } |
| } |
| |