[GitHub] [carbondata] ravipesala commented on a change in pull request #3196: [CARBONDATA-3366] Support SDK reader to read blocklet level split

[GitBox]

ravipesala commented on a change in pull request #3196: [CARBONDATA-3366] Support SDK reader to read blocklet level split
URL: https://github.com/apache/carbondata/pull/3196#discussion_r284109950
 
 

 ##########
 File path: store/sdk/src/main/java/org/apache/carbondata/sdk/file/CarbonReaderBuilder.java
 ##########
 @@ -184,48 +175,116 @@ public CarbonReaderBuilder withRowRecordReader() {
       }
       format.setColumnProjection(job.getConfiguration(), projectionColumns);
     }
+    if ((disableLoadBlockDataMap) && (filterExpression == null)) {
+      job.getConfiguration().set("filter_blocks", "false");
+    }
+    return format;
+  }
 
+  private <T> RecordReader getRecordReader(Job job, CarbonFileInputFormat format,
+      List<RecordReader<Void, T>> readers, InputSplit split)
+      throws IOException, InterruptedException {
+    TaskAttemptContextImpl attempt =
+        new TaskAttemptContextImpl(job.getConfiguration(), new TaskAttemptID());
+    RecordReader reader;
+    QueryModel queryModel = format.createQueryModel(split, attempt);
+    boolean hasComplex = false;
+    for (ProjectionDimension projectionDimension : queryModel.getProjectionDimensions()) {
+      if (projectionDimension.getDimension().isComplex()) {
+        hasComplex = true;
+        break;
+      }
+    }
+    if (useVectorReader && !hasComplex) {
+      queryModel.setDirectVectorFill(filterExpression == null);
+      reader = new CarbonVectorizedRecordReader(queryModel);
+    } else {
+      reader = format.createRecordReader(split, attempt);
+    }
     try {
+      reader.initialize(split, attempt);
+    } catch (Exception e) {
+      CarbonUtil.closeStreams(readers.toArray(new RecordReader[0]));
+      throw e;
+    }
+    return reader;
+  }
 
-      if (filterExpression == null) {
-        job.getConfiguration().set("filter_blocks", "false");
-      }
+  /**
+   * Build CarbonReader
+   *
+   * @param <T>
+   * @return CarbonReader
+   * @throws IOException
+   * @throws InterruptedException
+   */
+  public <T> CarbonReader<T> build()
+      throws IOException, InterruptedException {
+    if (hadoopConf == null) {
+      hadoopConf = FileFactory.getConfiguration();
+    }
+    final Job job = new Job(new JobConf(hadoopConf));
+    CarbonFileInputFormat format = prepareFileInputFormat(job, false, true);
+    try {
       List<InputSplit> splits =
           format.getSplits(new JobContextImpl(job.getConfiguration(), new JobID()));
       List<RecordReader<Void, T>> readers = new ArrayList<>(splits.size());
       for (InputSplit split : splits) {
-        TaskAttemptContextImpl attempt =
-            new TaskAttemptContextImpl(job.getConfiguration(), new TaskAttemptID());
-        RecordReader reader;
-        QueryModel queryModel = format.createQueryModel(split, attempt);
-        boolean hasComplex = false;
-        for (ProjectionDimension projectionDimension : queryModel.getProjectionDimensions()) {
-          if (projectionDimension.getDimension().isComplex()) {
-            hasComplex = true;
-            break;
-          }
-        }
-        if (useVectorReader && !hasComplex) {
-          queryModel.setDirectVectorFill(filterExpression == null);
-          reader = new CarbonVectorizedRecordReader(queryModel);
-        } else {
-          reader = format.createRecordReader(split, attempt);
-        }
-        try {
-          reader.initialize(split, attempt);
-          readers.add(reader);
-        } catch (Exception e) {
-          CarbonUtil.closeStreams(readers.toArray(new RecordReader[0]));
-          throw e;
-        }
+        RecordReader reader = getRecordReader(job, format, readers, split);
+        readers.add(reader);
       }
       return new CarbonReader<>(readers);
     } catch (Exception ex) {
       // Clear the datamap cache as it can get added in getSplits() method
       DataMapStoreManager.getInstance()
-          .clearDataMaps(table.getAbsoluteTableIdentifier());
+          .clearDataMaps(format.getAbsoluteTableIdentifier(hadoopConf));
       throw ex;
     }
   }
 
+  /**
+   * Build blocklet level CarbonReaders
+   *
+   * @param <T>
+   * @throws IOException
+   * @throws InterruptedException
+   */
+  public <T> CarbonReader<T>[] buildBlockletReaders() throws IOException, InterruptedException {
 
 Review comment:
   It should be just buildReaders and pass the enum to mention blocklet or block.

----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
 
For queries about this service, please contact Infrastructure at:
[hidden email]


With regards,
Apache Git Services