| /* |
| * 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.gearpump.sql.rel; |
| |
| import org.apache.calcite.plan.RelOptUtil; |
| import org.apache.calcite.plan.volcano.RelSubset; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.sql.SqlExplainLevel; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| class GearSqlRelUtils { |
| private static final Logger LOG = LoggerFactory.getLogger(GearSqlRelUtils.class); |
| |
| private static final AtomicInteger sequence = new AtomicInteger(0); |
| private static final AtomicInteger classSequence = new AtomicInteger(0); |
| |
| public static String getStageName(GearRelNode relNode) { |
| return relNode.getClass().getSimpleName().toUpperCase() + "_" + relNode.getId() + "_" |
| + sequence.getAndIncrement(); |
| } |
| |
| public static String getClassName(GearRelNode relNode) { |
| return "Generated_" + relNode.getClass().getSimpleName().toUpperCase() + "_" + relNode.getId() |
| + "_" + classSequence.getAndIncrement(); |
| } |
| |
| public static GearRelNode getGearRelInput(RelNode input) { |
| if (input instanceof RelSubset) { |
| // go with known best input |
| input = ((RelSubset) input).getBest(); |
| } |
| return (GearRelNode) input; |
| } |
| |
| public static String explain(final RelNode rel) { |
| return explain(rel, SqlExplainLevel.EXPPLAN_ATTRIBUTES); |
| } |
| |
| public static String explain(final RelNode rel, SqlExplainLevel detailLevel) { |
| String explain = ""; |
| try { |
| explain = RelOptUtil.toString(rel); |
| } catch (StackOverflowError e) { |
| LOG.error("StackOverflowError occurred while extracting plan. " |
| + "Please report it to the dev@ mailing list."); |
| LOG.error("RelNode " + rel + " ExplainLevel " + detailLevel, e); |
| LOG.error("Forcing plan to empty string and continue... " |
| + "SQL Runner may not working properly after."); |
| } |
| return explain; |
| } |
| } |