| /* |
| * 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.carbondata.core.profiler; |
| |
| import java.util.ArrayList; |
| import java.util.HashMap; |
| import java.util.Iterator; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.concurrent.ConcurrentHashMap; |
| |
| import org.apache.carbondata.common.annotations.InterfaceAudience; |
| import org.apache.carbondata.core.constants.CarbonCommonConstants; |
| import org.apache.carbondata.core.index.dev.expr.IndexWrapperSimpleInfo; |
| import org.apache.carbondata.core.util.CarbonProperties; |
| |
| /** |
| * An information collector used for EXPLAIN command, to print out |
| * SQL rewrite and pruning information. |
| * This class is a singleton, not supporting concurrent EXPLAIN command |
| */ |
| @InterfaceAudience.Internal |
| public class ExplainCollector { |
| |
| private static ExplainCollector INSTANCE = null; |
| |
| private List<String> mvProviders = new ArrayList<>(); |
| private List<String> mvNames = new ArrayList<>(); |
| |
| // mapping of thread name to map of table name to pruning info |
| private Map<String, Map<String, TablePruningInfo>> scans = new ConcurrentHashMap<>(); |
| |
| private ExplainCollector() { |
| } |
| |
| public static boolean enabled() { |
| return INSTANCE != null; |
| } |
| |
| public static void setup() { |
| boolean isQueryStatisticsEnabled = Boolean.parseBoolean(CarbonProperties.getInstance() |
| .getProperty(CarbonCommonConstants.ENABLE_QUERY_STATISTICS, |
| CarbonCommonConstants.ENABLE_QUERY_STATISTICS_DEFAULT)); |
| if (isQueryStatisticsEnabled) { |
| INSTANCE = new ExplainCollector(); |
| } |
| } |
| |
| public static void remove() { |
| if (enabled()) { |
| INSTANCE = null; |
| } |
| } |
| |
| public static ExplainCollector get() { |
| return INSTANCE; |
| } |
| |
| public static void addPruningInfo(String tableName) { |
| if (enabled()) { |
| ExplainCollector profiler = get(); |
| String threadName = Thread.currentThread().getName(); |
| if (!profiler.scans.containsKey(threadName)) { |
| Map<String, TablePruningInfo> map = new HashMap<>(); |
| map.put(tableName, new TablePruningInfo()); |
| profiler.scans.put(threadName, map); |
| } |
| } |
| } |
| |
| public static void setFilterStatement(String filterStatement) { |
| if (enabled()) { |
| TablePruningInfo scan = getCurrentTablePruningInfo(); |
| scan.setFilterStatement(filterStatement); |
| } |
| } |
| |
| public static void setShowPruningInfo(boolean showPruningInfo) { |
| if (enabled()) { |
| TablePruningInfo scan = getCurrentTablePruningInfo(); |
| scan.setShowPruningInfo(showPruningInfo); |
| } |
| } |
| |
| public static void addDefaultIndexPruningHit(int numBlocklets) { |
| if (enabled()) { |
| TablePruningInfo scan = getCurrentTablePruningInfo(); |
| scan.addNumBlockletsAfterDefaultPruning(numBlocklets); |
| } |
| } |
| |
| public static void setDefaultIndexPruningBlockHit(int numBlocks) { |
| if (enabled()) { |
| TablePruningInfo scan = getCurrentTablePruningInfo(); |
| scan.setNumBlocksAfterDefaultPruning(numBlocks); |
| } |
| } |
| |
| public static void recordCGIndexPruning(IndexWrapperSimpleInfo indexWrapperSimpleInfo, |
| int numBlocklets, int numBlocks) { |
| if (enabled()) { |
| TablePruningInfo scan = getCurrentTablePruningInfo(); |
| scan.setNumBlockletsAfterCGPruning(indexWrapperSimpleInfo, numBlocklets, numBlocks); |
| } |
| } |
| |
| public static void recordFGIndexPruning(IndexWrapperSimpleInfo indexWrapperSimpleInfo, |
| int numBlocklets, int numBlocks) { |
| if (enabled()) { |
| TablePruningInfo scan = getCurrentTablePruningInfo(); |
| scan.setNumBlockletsAfterFGPruning(indexWrapperSimpleInfo, numBlocklets, numBlocks); |
| } |
| } |
| |
| public static void addTotalBlocklets(int numBlocklets) { |
| if (enabled()) { |
| TablePruningInfo scan = getCurrentTablePruningInfo(); |
| scan.addTotalBlocklets(numBlocklets); |
| } |
| } |
| |
| public static void addTotalBlocks(int numBlocks) { |
| if (enabled()) { |
| TablePruningInfo scan = getCurrentTablePruningInfo(); |
| scan.addTotalBlocks(numBlocks); |
| } |
| } |
| |
| /** |
| * Return the current TablePruningInfo (It is the last one in the map, since it is in |
| * single thread) |
| */ |
| private static TablePruningInfo getCurrentTablePruningInfo() { |
| String threadName = Thread.currentThread().getName(); |
| if (!get().scans.containsKey(threadName)) { |
| throw new IllegalStateException(); |
| } |
| |
| Iterator<TablePruningInfo> iterator = get().scans.get(threadName).values().iterator(); |
| TablePruningInfo output = null; |
| while (iterator.hasNext()) { |
| output = iterator.next(); |
| } |
| return output; |
| } |
| |
| public static String getFormattedOutput() { |
| if (null != get()) { |
| return get().toString(); |
| } else { |
| return null; |
| } |
| } |
| |
| @Override |
| public String toString() { |
| StringBuilder builder = new StringBuilder(); |
| for (int i = 0; i < mvProviders.size(); i++) { |
| if (i == 0) { |
| builder.append("Query rewrite based on Index:").append("\n"); |
| } |
| builder.append(" - ").append(mvNames.get(i)).append(" (") |
| .append(mvProviders.get(i)).append(")").append("\n"); |
| } |
| for (Map.Entry<String, Map<String, TablePruningInfo>> allThreads : scans.entrySet()) { |
| for (Map.Entry<String, TablePruningInfo> entry : allThreads.getValue().entrySet()) { |
| builder.append("Table Scan on ").append(entry.getKey()).append("\n") |
| .append(entry.getValue().toString()); |
| } |
| } |
| return builder.toString(); |
| } |
| |
| } |