Kikyou1997 commented on code in PR #9303: URL: https://github.com/apache/incubator-doris/pull/9303#discussion_r861137881
########## fe/fe-core/src/main/java/org/apache/doris/planner/MetaScanNode.java: ########## @@ -0,0 +1,188 @@ +// 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.doris.planner; + +import com.google.common.base.Joiner; +import com.google.common.base.Preconditions; +import com.google.common.collect.Lists; +import org.apache.doris.analysis.AggregateInfo; +import org.apache.doris.analysis.Expr; +import org.apache.doris.analysis.FunctionCallExpr; +import org.apache.doris.analysis.FunctionParams; +import org.apache.doris.analysis.SlotDescriptor; +import org.apache.doris.analysis.SlotRef; +import org.apache.doris.analysis.TupleDescriptor; +import org.apache.doris.analysis.TupleId; +import org.apache.doris.catalog.Catalog; +import org.apache.doris.catalog.MaterializedIndex; +import org.apache.doris.catalog.OlapTable; +import org.apache.doris.catalog.Partition; +import org.apache.doris.catalog.Replica; +import org.apache.doris.catalog.Table; +import org.apache.doris.catalog.Tablet; +import org.apache.doris.system.Backend; +import org.apache.doris.thrift.TExplainLevel; +import org.apache.doris.thrift.TMetaScanNode; +import org.apache.doris.thrift.TNetworkAddress; +import org.apache.doris.thrift.TPaloScanRange; +import org.apache.doris.thrift.TPlanNode; +import org.apache.doris.thrift.TPlanNodeType; +import org.apache.doris.thrift.TScanRange; +import org.apache.doris.thrift.TScanRangeLocation; +import org.apache.doris.thrift.TScanRangeLocations; +import org.apache.logging.log4j.LogManager; +import org.apache.logging.log4j.Logger; + +import java.util.Collection; +import java.util.Collections; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.StringJoiner; + + +public class MetaScanNode extends ScanNode { + + private static final Logger LOG = LogManager.getLogger(MetaScanNode.class); + + private static final String NODE_NAME = "META_SCAN"; + + private Map<Integer, Integer> slotIdToDictId = new HashMap<>(); + + private final OlapTable olapTable; + + public MetaScanNode(PlanNodeId id, + TupleDescriptor tupleDesc) { + super(id, tupleDesc, NODE_NAME); + this.olapTable = (OlapTable) tupleDesc.getTable(); + } + + @Override + public List<TScanRangeLocations> getScanRangeLocations(long maxScanRangeLength) { + List<TScanRangeLocations> resultList = Lists.newArrayList(); + Collection<Partition> partitionCollection = olapTable.getPartitions(); + for (Partition partition : partitionCollection) { + long visibleVersion = partition.getVisibleVersion(); + String visibleVersionStr = String.valueOf(visibleVersion); + MaterializedIndex index = partition.getBaseIndex(); + List<Tablet> tablets = index.getTablets(); + for (Tablet tablet : tablets) { + long tabletId = tablet.getId(); + TScanRangeLocations scanRangeLocations = new TScanRangeLocations(); + TPaloScanRange paloRange = new TPaloScanRange(); + paloRange.setDbName(""); + paloRange.setSchemaHash(""); + paloRange.setVersion(visibleVersionStr); + paloRange.setVersionHash(""); + paloRange.setTabletId(tabletId); + + // random shuffle List && only collect one copy + List<Replica> replicas = tablet.getQueryableReplicas(visibleVersion); + if (replicas.isEmpty()) { + LOG.error("no queryable replica found in tablet {}. visible version {}", + tabletId, visibleVersion); + if (LOG.isDebugEnabled()) { + for (Replica replica : tablet.getReplicas()) { + LOG.debug("tablet {}, replica: {}", tabletId, replica.toString()); + } + } + throw new RuntimeException("Failed to get scan range, no queryable replica found in tablet: " + tabletId); + } + + Collections.shuffle(replicas); + boolean tabletIsNull = true; + List<String> errs = Lists.newArrayList(); + for (Replica replica : replicas) { + Backend backend = Catalog.getCurrentSystemInfo().getBackend(replica.getBackendId()); + if (backend == null || !backend.isAlive()) { + LOG.debug("backend {} not exists or is not alive for replica {}", + replica.getBackendId(), replica.getId()); + errs.add(replica.getId() + "'s backend " + replica.getBackendId() + " does not exist or not alive"); + continue; + } + String ip = backend.getHost(); + int port = backend.getBePort(); + TScanRangeLocation scanRangeLocation = new TScanRangeLocation(new TNetworkAddress(ip, port)); + scanRangeLocation.setBackendId(replica.getBackendId()); + scanRangeLocations.addToLocations(scanRangeLocation); + paloRange.addToHosts(new TNetworkAddress(ip, port)); + tabletIsNull = false; + } + if (tabletIsNull) { + throw new RuntimeException(tabletId + " have no queryable replicas. err: " + Joiner.on(", ").join(errs)); + } + TScanRange scanRange = new TScanRange(); + scanRange.setPaloScanRange(paloRange); + scanRangeLocations.setScanRange(scanRange); + + resultList.add(scanRangeLocations); + } + } + return resultList; + } + + public void pullDictSlots(AggregateInfo aggInfo) { + Preconditions.checkState(aggInfo.getGroupingExprs().isEmpty()); + List<FunctionCallExpr> funcExprList = aggInfo.getAggregateExprs(); + for (FunctionCallExpr funcExpr : funcExprList) { + FunctionParams funcParams = funcExpr.getFnParams(); + for (Expr expr : funcParams.exprs()) { + if (expr instanceof SlotRef && expr.isAnalyzed()) { Review Comment: removed it -- This is an automated message from the Apache Git Service. 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