How to use

getMapping

method

in

org.apache.kylin.storage.StorageContext

public SegmentCubeTupleIterator(CubeSegmentScanner scanner, Cuboid cuboid, Set<TblColRef> selectedDimensions, //
    Set<FunctionDesc> selectedMetrics, TupleInfo returnTupleInfo, StorageContext context) {
  this.scanner = scanner;
  this.cuboid = cuboid;
  this.selectedDimensions = selectedDimensions;
  this.selectedMetrics = selectedMetrics;
  this.tupleInfo = returnTupleInfo;
  this.tuple = new Tuple(returnTupleInfo);
  this.context = context;
  CuboidToGridTableMapping mapping = context.getMapping();
  int[] gtDimsIdx = mapping.getDimIndexes(selectedDimensions);
  int[] gtMetricsIdx = mapping.getMetricsIndexes(selectedMetrics);
  // gtColIdx = gtDimsIdx + gtMetricsIdx
  int[] gtColIdx = new int[gtDimsIdx.length + gtMetricsIdx.length];
  System.arraycopy(gtDimsIdx, 0, gtColIdx, 0, gtDimsIdx.length);
  System.arraycopy(gtMetricsIdx, 0, gtColIdx, gtDimsIdx.length, gtMetricsIdx.length);
  this.gtValues = getGTValuesIterator(scanner.iterator(), scanner.getScanRequest(), gtDimsIdx, gtMetricsIdx);
  this.cubeTupleConverter = ((GTCubeStorageQueryBase) context.getStorageQuery()).newCubeTupleConverter(
      scanner.cubeSeg, cuboid, selectedDimensions, selectedMetrics, gtColIdx, tupleInfo);
}

this.cuboid = cuboid;
final CuboidToGridTableMapping mapping = context.getMapping();

public SegmentCubeTupleIterator(CubeSegmentScanner scanner, Cuboid cuboid, Set<TblColRef> selectedDimensions, //
    Set<FunctionDesc> selectedMetrics, TupleInfo returnTupleInfo, StorageContext context) {
  this.scanner = scanner;
  this.cuboid = cuboid;
  this.selectedDimensions = selectedDimensions;
  this.selectedMetrics = selectedMetrics;
  this.tupleInfo = returnTupleInfo;
  this.tuple = new Tuple(returnTupleInfo);
  this.context = context;
  CuboidToGridTableMapping mapping = context.getMapping();
  int[] gtDimsIdx = mapping.getDimIndexes(selectedDimensions);
  int[] gtMetricsIdx = mapping.getMetricsIndexes(selectedMetrics);
  // gtColIdx = gtDimsIdx + gtMetricsIdx
  int[] gtColIdx = new int[gtDimsIdx.length + gtMetricsIdx.length];
  System.arraycopy(gtDimsIdx, 0, gtColIdx, 0, gtDimsIdx.length);
  System.arraycopy(gtMetricsIdx, 0, gtColIdx, gtDimsIdx.length, gtMetricsIdx.length);
  this.gtValues = getGTValuesIterator(scanner.iterator(), scanner.getScanRequest(), gtDimsIdx, gtMetricsIdx);
  this.cubeTupleConverter = ((GTCubeStorageQueryBase) context.getStorageQuery()).newCubeTupleConverter(
      scanner.cubeSeg, cuboid, selectedDimensions, selectedMetrics, gtColIdx, tupleInfo);
}

this.cuboid = cuboid;
final CuboidToGridTableMapping mapping = context.getMapping();