Examples with SingleColumnSingleValueWriter com.linkedin.pinot.core.io.writer.SingleColumnSingleValueWriter used on opensource projects

Example 1 with SingleColumnSingleValueWriter

use of com.linkedin.pinot.core.io.writer.SingleColumnSingleValueWriter in project pinot by linkedin.

the class SegmentFormatConverterV1ToV2 method convert.

@Override
public void convert(File indexSegmentDir) throws Exception {
    SegmentMetadataImpl segmentMetadataImpl = new SegmentMetadataImpl(indexSegmentDir);
    SegmentDirectory segmentDirectory = SegmentDirectory.createFromLocalFS(indexSegmentDir, segmentMetadataImpl, ReadMode.mmap);
    Set<String> columns = segmentMetadataImpl.getAllColumns();
    SegmentDirectory.Writer segmentWriter = segmentDirectory.createWriter();
    for (String column : columns) {
        ColumnMetadata columnMetadata = segmentMetadataImpl.getColumnMetadataFor(column);
        if (columnMetadata.isSorted()) {
            // no need to change sorted forward index
            continue;
        }
        PinotDataBuffer fwdIndexBuffer = segmentWriter.getIndexFor(column, ColumnIndexType.FORWARD_INDEX);
        if (columnMetadata.isSingleValue() && !columnMetadata.isSorted()) {
            // since we use dictionary to encode values, we wont have any negative values in forward
            // index
            boolean signed = false;
            SingleColumnSingleValueReader v1Reader = new com.linkedin.pinot.core.io.reader.impl.v1.FixedBitSingleValueReader(fwdIndexBuffer, segmentMetadataImpl.getTotalDocs(), columnMetadata.getBitsPerElement(), false);
            File convertedFwdIndexFile = new File(indexSegmentDir, column + V1Constants.Indexes.UN_SORTED_SV_FWD_IDX_FILE_EXTENTION + ".tmp");
            SingleColumnSingleValueWriter v2Writer = new com.linkedin.pinot.core.io.writer.impl.v2.FixedBitSingleValueWriter(convertedFwdIndexFile, segmentMetadataImpl.getTotalDocs(), columnMetadata.getBitsPerElement());
            for (int row = 0; row < segmentMetadataImpl.getTotalDocs(); row++) {
                int value = v1Reader.getInt(row);
                v2Writer.setInt(row, value);
            }
            v1Reader.close();
            v2Writer.close();
            File fwdIndexFileCopy = new File(indexSegmentDir, column + V1Constants.Indexes.UN_SORTED_SV_FWD_IDX_FILE_EXTENTION + ".orig");
            segmentWriter.removeIndex(column, ColumnIndexType.FORWARD_INDEX);
            // FIXME
            PinotDataBuffer newIndexBuffer = segmentWriter.newIndexFor(column, ColumnIndexType.FORWARD_INDEX, (int) convertedFwdIndexFile.length());
            newIndexBuffer.readFrom(convertedFwdIndexFile);
            convertedFwdIndexFile.delete();
        }
        if (!columnMetadata.isSingleValue()) {
            // since we use dictionary to encode values, we wont have any negative values in forward
            // index
            boolean signed = false;
            SingleColumnMultiValueReader v1Reader = new com.linkedin.pinot.core.io.reader.impl.v1.FixedBitMultiValueReader(fwdIndexBuffer, segmentMetadataImpl.getTotalDocs(), columnMetadata.getTotalNumberOfEntries(), columnMetadata.getBitsPerElement(), signed);
            File convertedFwdIndexFile = new File(indexSegmentDir, column + V1Constants.Indexes.UN_SORTED_MV_FWD_IDX_FILE_EXTENTION + ".tmp");
            SingleColumnMultiValueWriter v2Writer = new com.linkedin.pinot.core.io.writer.impl.v2.FixedBitMultiValueWriter(convertedFwdIndexFile, segmentMetadataImpl.getTotalDocs(), columnMetadata.getTotalNumberOfEntries(), columnMetadata.getBitsPerElement());
            int[] values = new int[columnMetadata.getMaxNumberOfMultiValues()];
            for (int row = 0; row < segmentMetadataImpl.getTotalDocs(); row++) {
                int length = v1Reader.getIntArray(row, values);
                int[] copy = new int[length];
                System.arraycopy(values, 0, copy, 0, length);
                v2Writer.setIntArray(row, copy);
            }
            v1Reader.close();
            v2Writer.close();
            segmentWriter.removeIndex(column, ColumnIndexType.FORWARD_INDEX);
            PinotDataBuffer newIndexBuffer = segmentWriter.newIndexFor(column, ColumnIndexType.FORWARD_INDEX, (int) convertedFwdIndexFile.length());
            newIndexBuffer.readFrom(convertedFwdIndexFile);
            convertedFwdIndexFile.delete();
        }
    }
    File metadataFile = new File(indexSegmentDir, V1Constants.MetadataKeys.METADATA_FILE_NAME);
    File metadataFileCopy = new File(indexSegmentDir, V1Constants.MetadataKeys.METADATA_FILE_NAME + ".orig");
    bis = new BufferedInputStream(new FileInputStream(metadataFile));
    bos = new BufferedOutputStream(new FileOutputStream(metadataFileCopy));
    IOUtils.copy(bis, bos);
    bis.close();
    bos.close();
    final PropertiesConfiguration properties = new PropertiesConfiguration(metadataFileCopy);
    // update the segment version
    properties.setProperty(V1Constants.MetadataKeys.Segment.SEGMENT_VERSION, SegmentVersion.v2.toString());
    metadataFile.delete();
    properties.save(metadataFile);
}