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Support Incremental dataload for mv(single tables)
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Indhumathi27
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May 20, 2019
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core/src/main/java/org/apache/carbondata/core/datamap/dev/DataMapSyncStatus.java
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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.carbondata.core.datamap.dev; | ||
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| import java.io.IOException; | ||
| import java.util.HashMap; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
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| import org.apache.carbondata.common.annotations.InterfaceAudience; | ||
| import org.apache.carbondata.core.constants.CarbonCommonConstants; | ||
| import org.apache.carbondata.core.datamap.DataMapUtil; | ||
| import org.apache.carbondata.core.datamap.status.DataMapSegmentStatusUtil; | ||
| import org.apache.carbondata.core.metadata.schema.table.DataMapSchema; | ||
| import org.apache.carbondata.core.metadata.schema.table.RelationIdentifier; | ||
| import org.apache.carbondata.core.statusmanager.LoadMetadataDetails; | ||
| import org.apache.carbondata.core.statusmanager.SegmentStatusManager; | ||
| import org.apache.carbondata.core.util.path.CarbonTablePath; | ||
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| /** | ||
| * Interface to check whether datamap can be enabled | ||
| */ | ||
| @InterfaceAudience.Developer("DataMap") | ||
| public abstract class DataMapSyncStatus { | ||
|
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| /** | ||
| * This method checks if main table and datamap table are synchronised or not. If synchronised | ||
| * return true to enable the datamap | ||
| * | ||
| * @param dataMapSchema of datamap to be disabled or enabled | ||
| * @return flag to enable or disable datamap | ||
| * @throws IOException | ||
| */ | ||
| public static boolean canDataMapBeEnabled(DataMapSchema dataMapSchema) throws IOException { | ||
| boolean isDataMapInSync = true; | ||
| String metaDataPath = | ||
| CarbonTablePath.getMetadataPath(dataMapSchema.getRelationIdentifier().getTablePath()); | ||
| LoadMetadataDetails[] dataMapLoadMetadataDetails = | ||
| SegmentStatusManager.readLoadMetadata(metaDataPath); | ||
| Map<String, List<String>> dataMapSegmentMap = new HashMap<>(); | ||
| for (LoadMetadataDetails loadMetadataDetail : dataMapLoadMetadataDetails) { | ||
| Map<String, List<String>> segmentMap = | ||
| DataMapSegmentStatusUtil.getSegmentMap(loadMetadataDetail.getExtraInfo()); | ||
| if (dataMapSegmentMap.isEmpty()) { | ||
| dataMapSegmentMap.putAll(segmentMap); | ||
| } else { | ||
| for (Map.Entry<String, List<String>> entry : segmentMap.entrySet()) { | ||
| if (null != dataMapSegmentMap.get(entry.getKey())) { | ||
| dataMapSegmentMap.get(entry.getKey()).addAll(entry.getValue()); | ||
| } | ||
| } | ||
| } | ||
| } | ||
| List<RelationIdentifier> parentTables = dataMapSchema.getParentTables(); | ||
| for (RelationIdentifier parentTable : parentTables) { | ||
| List<String> mainTableValidSegmentList = | ||
| DataMapUtil.getMainTableValidSegmentList(parentTable); | ||
| if (!mainTableValidSegmentList.isEmpty() && !dataMapSegmentMap.isEmpty()) { | ||
| isDataMapInSync = dataMapSegmentMap.get( | ||
| parentTable.getDatabaseName() + CarbonCommonConstants.POINT + parentTable | ||
| .getTableName()).containsAll(mainTableValidSegmentList); | ||
| } else if (dataMapSegmentMap.isEmpty() && !mainTableValidSegmentList.isEmpty()) { | ||
| isDataMapInSync = false; | ||
| } | ||
| } | ||
| return isDataMapInSync; | ||
| } | ||
| } |
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