Examples with UnsafeCarbonRowForMerge org.apache.carbondata.processing.newflow.sort.unsafe.holder.UnsafeCarbonRowForMerge used on opensource projects

Example 1 with UnsafeCarbonRowForMerge

use of org.apache.carbondata.processing.newflow.sort.unsafe.holder.UnsafeCarbonRowForMerge in project carbondata by apache.

the class UnsafeInMemoryIntermediateDataMerger method getSortedRecordFromMemory.

/**
   * This method will be used to get the sorted record from file
   *
   * @return sorted record sorted record
   * @throws CarbonSortKeyAndGroupByException
   */
private UnsafeCarbonRowForMerge getSortedRecordFromMemory() throws CarbonSortKeyAndGroupByException {
    UnsafeCarbonRowForMerge row = null;
    // poll the top object from heap
    // heap maintains binary tree which is based on heap condition that will
    // be based on comparator we are passing the heap
    // when will call poll it will always delete root of the tree and then
    // it does trickel down operation complexity is log(n)
    UnsafeInmemoryMergeHolder poll = this.recordHolderHeap.poll();
    // get the row from chunk
    row = poll.getRow();
    // check if there no entry present
    if (!poll.hasNext()) {
        // change the file counter
        --this.holderCounter;
        // reaturn row
        return row;
    }
    // read new row
    poll.readRow();
    // add to heap
    this.recordHolderHeap.add(poll);
    // return row
    return row;
}