| /* |
| * 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.iotdb.db.queryengine.plan.statement.metadata; |
| |
| import org.apache.iotdb.commons.path.PartialPath; |
| import org.apache.iotdb.confignode.rpc.thrift.TDatabaseInfo; |
| import org.apache.iotdb.db.queryengine.common.header.ColumnHeader; |
| import org.apache.iotdb.db.queryengine.common.header.ColumnHeaderConstant; |
| import org.apache.iotdb.db.queryengine.common.header.DatasetHeader; |
| import org.apache.iotdb.db.queryengine.common.header.DatasetHeaderFactory; |
| import org.apache.iotdb.db.queryengine.plan.analyze.QueryType; |
| import org.apache.iotdb.db.queryengine.plan.execution.config.ConfigTaskResult; |
| import org.apache.iotdb.db.queryengine.plan.statement.IConfigStatement; |
| import org.apache.iotdb.db.queryengine.plan.statement.StatementVisitor; |
| import org.apache.iotdb.rpc.TSStatusCode; |
| |
| import com.google.common.util.concurrent.SettableFuture; |
| import org.apache.tsfile.common.conf.TSFileConfig; |
| import org.apache.tsfile.enums.TSDataType; |
| import org.apache.tsfile.read.common.block.TsBlockBuilder; |
| import org.apache.tsfile.utils.Binary; |
| |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Map; |
| import java.util.stream.Collectors; |
| |
| /** |
| * SHOW DATABASES statement |
| * |
| * <p>Here is the syntax definition: |
| * |
| * <p>SHOW DATABASES prefixPath? |
| */ |
| public class ShowDatabaseStatement extends ShowStatement implements IConfigStatement { |
| |
| private final PartialPath pathPattern; |
| private boolean isDetailed; |
| |
| public ShowDatabaseStatement(PartialPath pathPattern) { |
| super(); |
| this.pathPattern = pathPattern; |
| this.isDetailed = false; |
| } |
| |
| public PartialPath getPathPattern() { |
| return pathPattern; |
| } |
| |
| public boolean isDetailed() { |
| return isDetailed; |
| } |
| |
| public void setDetailed(boolean detailed) { |
| isDetailed = detailed; |
| } |
| |
| public void buildTSBlock( |
| Map<String, TDatabaseInfo> storageGroupInfoMap, SettableFuture<ConfigTaskResult> future) { |
| |
| List<TSDataType> outputDataTypes = |
| isDetailed |
| ? ColumnHeaderConstant.showStorageGroupsDetailColumnHeaders.stream() |
| .map(ColumnHeader::getColumnType) |
| .collect(Collectors.toList()) |
| : ColumnHeaderConstant.showStorageGroupsColumnHeaders.stream() |
| .map(ColumnHeader::getColumnType) |
| .collect(Collectors.toList()); |
| |
| TsBlockBuilder builder = new TsBlockBuilder(outputDataTypes); |
| for (Map.Entry<String, TDatabaseInfo> entry : storageGroupInfoMap.entrySet()) { |
| String storageGroup = entry.getKey(); |
| TDatabaseInfo storageGroupInfo = entry.getValue(); |
| builder.getTimeColumnBuilder().writeLong(0L); |
| builder |
| .getColumnBuilder(0) |
| .writeBinary(new Binary(storageGroup, TSFileConfig.STRING_CHARSET)); |
| |
| if (Long.MAX_VALUE == storageGroupInfo.getTTL()) { |
| builder.getColumnBuilder(1).appendNull(); |
| } else { |
| builder.getColumnBuilder(1).writeLong(storageGroupInfo.getTTL()); |
| } |
| builder.getColumnBuilder(2).writeInt(storageGroupInfo.getSchemaReplicationFactor()); |
| builder.getColumnBuilder(3).writeInt(storageGroupInfo.getDataReplicationFactor()); |
| builder.getColumnBuilder(4).writeLong(storageGroupInfo.getTimePartitionInterval()); |
| if (isDetailed) { |
| builder.getColumnBuilder(5).writeInt(storageGroupInfo.getSchemaRegionNum()); |
| builder.getColumnBuilder(6).writeInt(storageGroupInfo.getMinSchemaRegionNum()); |
| builder.getColumnBuilder(7).writeInt(storageGroupInfo.getMaxSchemaRegionNum()); |
| builder.getColumnBuilder(8).writeInt(storageGroupInfo.getDataRegionNum()); |
| builder.getColumnBuilder(9).writeInt(storageGroupInfo.getMinDataRegionNum()); |
| builder.getColumnBuilder(10).writeInt(storageGroupInfo.getMaxDataRegionNum()); |
| } |
| builder.declarePosition(); |
| } |
| |
| DatasetHeader datasetHeader = DatasetHeaderFactory.getShowStorageGroupHeader(isDetailed); |
| future.set(new ConfigTaskResult(TSStatusCode.SUCCESS_STATUS, builder.build(), datasetHeader)); |
| } |
| |
| @Override |
| public <R, C> R accept(StatementVisitor<R, C> visitor, C context) { |
| return visitor.visitShowStorageGroup(this, context); |
| } |
| |
| @Override |
| public QueryType getQueryType() { |
| return QueryType.READ; |
| } |
| |
| @Override |
| public List<PartialPath> getPaths() { |
| return Collections.singletonList(pathPattern); |
| } |
| } |