Github user dhatchayani commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2244#discussion_r185435135
--- Diff:
core/src/main/java/org/apache/carbondata/core/util/BlockletDataMapUtil.java ---
@@ -0,0 +1,198 @@
+/*
+ * 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.util;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.TreeMap;
+
+import org.apache.carbondata.common.logging.LogService;
+import org.apache.carbondata.common.logging.LogServiceFactory;
+import org.apache.carbondata.core.constants.CarbonCommonConstants;
+import org.apache.carbondata.core.datamap.Segment;
+import
org.apache.carbondata.core.datastore.filesystem.AbstractDFSCarbonFile;
+import org.apache.carbondata.core.datastore.filesystem.CarbonFile;
+import org.apache.carbondata.core.datastore.impl.FileFactory;
+import org.apache.carbondata.core.indexstore.BlockMetaInfo;
+import
org.apache.carbondata.core.indexstore.TableBlockIndexUniqueIdentifier;
+import
org.apache.carbondata.core.indexstore.blockletindex.BlockletDataMapDistributable;
+import
org.apache.carbondata.core.indexstore.blockletindex.SegmentIndexFileStore;
+import org.apache.carbondata.core.metadata.blocklet.DataFileFooter;
+import org.apache.carbondata.core.util.path.CarbonTablePath;
+
+import org.apache.hadoop.fs.LocatedFileStatus;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.PathFilter;
+import org.apache.hadoop.fs.RemoteIterator;
+
+
+public class BlockletDataMapUtil {
+
+ private static final LogService LOGGER =
+ LogServiceFactory.getLogService(BlockletDataMapUtil.class.getName());
+
+ public static Map<String, BlockMetaInfo> getBlockMetaInfoMap(
+ TableBlockIndexUniqueIdentifier identifier, SegmentIndexFileStore
indexFileStore,
+ Set<String> filesRead, Map<String, BlockMetaInfo>
fileNameToMetaInfoMapping)
+ throws IOException {
+ if (identifier.getMergeIndexFileName() != null
+ && indexFileStore.getFileData(identifier.getIndexFileName()) ==
null) {
+ CarbonFile indexMergeFile = FileFactory.getCarbonFile(
+ identifier.getIndexFilePath() +
CarbonCommonConstants.FILE_SEPARATOR + identifier
+ .getMergeIndexFileName());
+ if (indexMergeFile.exists() &&
!filesRead.contains(indexMergeFile.getPath())) {
+ indexFileStore.readAllIIndexOfSegment(new CarbonFile[] {
indexMergeFile });
+ filesRead.add(indexMergeFile.getPath());
+ }
+ }
+ if (indexFileStore.getFileData(identifier.getIndexFileName()) == null)
{
+ indexFileStore.readAllIIndexOfSegment(new CarbonFile[] {
FileFactory.getCarbonFile(
+ identifier.getIndexFilePath() +
CarbonCommonConstants.FILE_SEPARATOR + identifier
+ .getIndexFileName()) });
+ }
+ DataFileFooterConverter fileFooterConverter = new
DataFileFooterConverter();
+ Map<String, BlockMetaInfo> blockMetaInfoMap = new HashMap<>();
+ List<DataFileFooter> indexInfo = fileFooterConverter.getIndexInfo(
+ identifier.getIndexFilePath() +
CarbonCommonConstants.FILE_SEPARATOR + identifier
+ .getIndexFileName(),
indexFileStore.getFileData(identifier.getIndexFileName()));
+ for (DataFileFooter footer : indexInfo) {
+ String blockPath =
footer.getBlockInfo().getTableBlockInfo().getFilePath();
+ if (FileFactory.isFileExist(blockPath)) {
--- End diff --
This check is required in case of update/delete operation.
---
