How to use

getDimensionNames

method

in

org.apache.druid.segment.incremental.IncrementalIndex

@Override
public List<String> getDimensionNames()
{
 return index.getDimensionNames();
}

@Override
public List<String> getColumnNames()
{
 List<String> columnNames = new ArrayList<>(getDimensionNames());
 columnNames.addAll(getMetricNames());
 return columnNames;
}

@Override
public Indexed<String> getAvailableDimensions()
{
 return new ListIndexed<>(index.getDimensionNames());
}

private void flushIndexToContextAndClose(BytesWritable key, IncrementalIndex index, Context context)
  throws IOException, InterruptedException
{
 final List<String> dimensions = index.getDimensionNames();
 Iterator<Row> rows = index.iterator();
 while (rows.hasNext()) {
  context.progress();
  Row row = rows.next();
  InputRow inputRow = getInputRowFromRow(row, dimensions);
  // reportParseExceptions is true as any unparseable data is already handled by the mapper.
  InputRowSerde.SerializeResult serializeResult = InputRowSerde.toBytes(typeHelperMap, inputRow, combiningAggs);
  context.write(
    key,
    new BytesWritable(serializeResult.getSerializedRow())
  );
 }
 index.close();
}

@Test
public void testCaseSensitivity() throws Exception
{
 long timestamp = System.currentTimeMillis();
 IncrementalIndex index = closerRule.closeLater(indexCreator.createIndex(defaultAggregatorFactories));
 populateIndex(timestamp, index);
 Assert.assertEquals(Arrays.asList("dim1", "dim2"), index.getDimensionNames());
 Assert.assertEquals(2, index.size());
 final Iterator<Row> rows = index.iterator();
 Row row = rows.next();
 Assert.assertEquals(timestamp, row.getTimestampFromEpoch());
 Assert.assertEquals(Collections.singletonList("1"), row.getDimension("dim1"));
 Assert.assertEquals(Collections.singletonList("2"), row.getDimension("dim2"));
 row = rows.next();
 Assert.assertEquals(timestamp, row.getTimestampFromEpoch());
 Assert.assertEquals(Collections.singletonList("3"), row.getDimension("dim1"));
 Assert.assertEquals(Collections.singletonList("4"), row.getDimension("dim2"));
}

Assert.assertEquals(dimensionCount, index.getDimensionNames().size());
Assert.assertEquals(elementsPerThread * (isRollup ? 1 : threadCount), index.size());
Iterator<Row> iterator = index.iterator();

@Test
public void testgetDimensions()
{
 final IncrementalIndex<Aggregator> incrementalIndex = new IncrementalIndex.Builder()
   .setIndexSchema(
     new IncrementalIndexSchema.Builder()
       .withMetrics(new CountAggregatorFactory("count"))
       .withDimensionsSpec(
         new DimensionsSpec(
           DimensionsSpec.getDefaultSchemas(Arrays.asList("dim0", "dim1")),
           null,
           null
         )
       )
       .build()
   )
   .setMaxRowCount(1000000)
   .buildOnheap();
 closerRule.closeLater(incrementalIndex);
 Assert.assertEquals(Arrays.asList("dim0", "dim1"), incrementalIndex.getDimensionNames());
}

Assert.assertEquals(Arrays.asList("dim1", "dim2", "dim3"), index.getDimensionNames());
Assert.assertEquals(
  Arrays.asList(

@Override
public List<String> getDimensionNames()
{
 return index.getDimensionNames();
}

@Override
public List<String> getColumnNames()
{
 List<String> columnNames = new ArrayList<>(getDimensionNames());
 columnNames.addAll(getMetricNames());
 return columnNames;
}

@Override
public Indexed<String> getAvailableDimensions()
{
 return new ListIndexed<>(index.getDimensionNames());
}

private void flushIndexToContextAndClose(BytesWritable key, IncrementalIndex index, Context context)
  throws IOException, InterruptedException
{
 final List<String> dimensions = index.getDimensionNames();
 Iterator<Row> rows = index.iterator();
 while (rows.hasNext()) {
  context.progress();
  Row row = rows.next();
  InputRow inputRow = getInputRowFromRow(row, dimensions);
  // reportParseExceptions is true as any unparseable data is already handled by the mapper.
  InputRowSerde.SerializeResult serializeResult = InputRowSerde.toBytes(typeHelperMap, inputRow, combiningAggs);
  context.write(
    key,
    new BytesWritable(serializeResult.getSerializedRow())
  );
 }
 index.close();
}