Implemented the count database in table model #17705
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| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.iotdb.db.queryengine.plan.execution.config.metadata.relational; | ||
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| import org.apache.iotdb.commons.conf.IoTDBConstant; | ||
| import org.apache.iotdb.commons.schema.column.ColumnHeader; | ||
| import org.apache.iotdb.db.queryengine.common.header.DatasetHeader; | ||
| import org.apache.iotdb.db.queryengine.plan.execution.config.ConfigTaskResult; | ||
| import org.apache.iotdb.db.queryengine.plan.execution.config.IConfigTask; | ||
| import org.apache.iotdb.db.queryengine.plan.execution.config.executor.IConfigTaskExecutor; | ||
| import org.apache.iotdb.db.queryengine.plan.relational.sql.ast.CountDB; | ||
| import org.apache.iotdb.rpc.TSStatusCode; | ||
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| import com.google.common.util.concurrent.ListenableFuture; | ||
| import com.google.common.util.concurrent.SettableFuture; | ||
| import org.apache.tsfile.enums.TSDataType; | ||
| import org.apache.tsfile.read.common.block.TsBlockBuilder; | ||
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| import java.util.Collections; | ||
| import java.util.Map; | ||
| import java.util.function.Predicate; | ||
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| import static org.apache.iotdb.commons.schema.table.InformationSchema.INFORMATION_DATABASE; | ||
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| public class CountDBTask implements IConfigTask { | ||
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| private final CountDB node; | ||
| private final Predicate<String> canSeenDB; | ||
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| public CountDBTask(final CountDB node, final Predicate<String> canSeenDB) { | ||
| this.node = node; | ||
| this.canSeenDB = canSeenDB; | ||
| } | ||
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| @Override | ||
| public ListenableFuture<ConfigTaskResult> execute(final IConfigTaskExecutor configTaskExecutor) | ||
| throws InterruptedException { | ||
| return configTaskExecutor.countDatabases(node, canSeenDB); | ||
| } | ||
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| public static void buildTSBlock( | ||
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| final Map<String, ?> databaseInfoMap, | ||
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CRZbulabula marked this conversation as resolved.
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| final SettableFuture<ConfigTaskResult> future, | ||
| final Predicate<String> canSeenDB) { | ||
| // information_schema is synthesized in table model rather than returned from ConfigNode. | ||
| final long databaseCount = | ||
| databaseInfoMap.keySet().stream() | ||
| .filter(databaseName -> !INFORMATION_DATABASE.equals(databaseName)) | ||
| .filter(canSeenDB::test) | ||
| .count() | ||
| + (canSeenDB.test(INFORMATION_DATABASE) ? 1 : 0); | ||
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| final TsBlockBuilder builder = new TsBlockBuilder(Collections.singletonList(TSDataType.INT32)); | ||
| builder.getTimeColumnBuilder().writeLong(0L); | ||
| builder.getColumnBuilder(0).writeInt((int) databaseCount); | ||
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Contributor
There was a problem hiding this comment. Narrowing cast |
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| builder.declarePosition(); | ||
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| final DatasetHeader datasetHeader = | ||
| new DatasetHeader( | ||
| Collections.singletonList( | ||
| new ColumnHeader(IoTDBConstant.COLUMN_COUNT, TSDataType.INT32)), | ||
| true); | ||
| future.set(new ConfigTaskResult(TSStatusCode.SUCCESS_STATUS, builder.build(), datasetHeader)); | ||
| } | ||
| } | ||
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.iotdb.db.queryengine.plan.relational.sql.ast; | ||
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| import org.apache.iotdb.commons.queryengine.plan.relational.sql.ast.AstMemoryEstimationHelper; | ||
| import org.apache.iotdb.commons.queryengine.plan.relational.sql.ast.IAstVisitor; | ||
| import org.apache.iotdb.commons.queryengine.plan.relational.sql.ast.Node; | ||
| import org.apache.iotdb.commons.queryengine.plan.relational.sql.ast.NodeLocation; | ||
| import org.apache.iotdb.commons.queryengine.plan.relational.sql.ast.Statement; | ||
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| import com.google.common.collect.ImmutableList; | ||
| import org.apache.tsfile.utils.RamUsageEstimator; | ||
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Contributor
There was a problem hiding this comment.
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| import java.util.List; | ||
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| import static java.util.Objects.requireNonNull; | ||
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| public class CountDB extends Statement { | ||
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| private static final long INSTANCE_SIZE = RamUsageEstimator.shallowSizeOfInstance(CountDB.class); | ||
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| public CountDB(final NodeLocation location) { | ||
| super(requireNonNull(location, "location is null")); | ||
| } | ||
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| @Override | ||
| public <R, C> R accept(final IAstVisitor<R, C> visitor, final C context) { | ||
| return ((AstVisitor<R, C>) visitor).visitCountDB(this, context); | ||
| } | ||
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| @Override | ||
| public List<Node> getChildren() { | ||
| return ImmutableList.of(); | ||
| } | ||
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| @Override | ||
| public int hashCode() { | ||
| return getClass().hashCode(); | ||
| } | ||
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| @Override | ||
| public boolean equals(final Object obj) { | ||
| if (this == obj) { | ||
| return true; | ||
| } | ||
| return (obj != null) && (getClass() == obj.getClass()); | ||
| } | ||
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| @Override | ||
| public String toString() { | ||
| return "COUNT DATABASES"; | ||
| } | ||
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| @Override | ||
| public long ramBytesUsed() { | ||
| long size = INSTANCE_SIZE; | ||
| size += AstMemoryEstimationHelper.getEstimatedSizeOfNodeLocation(getLocationInternal()); | ||
| return size; | ||
| } | ||
| } | ||
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