Examples with RowGroup org.apache.parquet.format.RowGroup used on opensource projects

Example 1 with RowGroup

use of org.apache.parquet.format.RowGroup in project parquet-mr by apache.

the class ParquetMetadataConverter method fromParquetMetadata.

public ParquetMetadata fromParquetMetadata(FileMetaData parquetMetadata) throws IOException {
    MessageType messageType = fromParquetSchema(parquetMetadata.getSchema(), parquetMetadata.getColumn_orders());
    List<BlockMetaData> blocks = new ArrayList<BlockMetaData>();
    List<RowGroup> row_groups = parquetMetadata.getRow_groups();
    if (row_groups != null) {
        for (RowGroup rowGroup : row_groups) {
            BlockMetaData blockMetaData = new BlockMetaData();
            blockMetaData.setRowCount(rowGroup.getNum_rows());
            blockMetaData.setTotalByteSize(rowGroup.getTotal_byte_size());
            List<ColumnChunk> columns = rowGroup.getColumns();
            String filePath = columns.get(0).getFile_path();
            for (ColumnChunk columnChunk : columns) {
                if ((filePath == null && columnChunk.getFile_path() != null) || (filePath != null && !filePath.equals(columnChunk.getFile_path()))) {
                    throw new ParquetDecodingException("all column chunks of the same row group must be in the same file for now");
                }
                ColumnMetaData metaData = columnChunk.meta_data;
                ColumnPath path = getPath(metaData);
                ColumnChunkMetaData column = ColumnChunkMetaData.get(path, messageType.getType(path.toArray()).asPrimitiveType(), fromFormatCodec(metaData.codec), convertEncodingStats(metaData.getEncoding_stats()), fromFormatEncodings(metaData.encodings), fromParquetStatistics(parquetMetadata.getCreated_by(), metaData.statistics, messageType.getType(path.toArray()).asPrimitiveType()), metaData.data_page_offset, metaData.dictionary_page_offset, metaData.num_values, metaData.total_compressed_size, metaData.total_uncompressed_size);
                // TODO
                // index_page_offset
                // key_value_metadata
                blockMetaData.addColumn(column);
            }
            blockMetaData.setPath(filePath);
            blocks.add(blockMetaData);
        }
    }
    Map<String, String> keyValueMetaData = new HashMap<String, String>();
    List<KeyValue> key_value_metadata = parquetMetadata.getKey_value_metadata();
    if (key_value_metadata != null) {
        for (KeyValue keyValue : key_value_metadata) {
            keyValueMetaData.put(keyValue.key, keyValue.value);
        }
    }
    return new ParquetMetadata(new org.apache.parquet.hadoop.metadata.FileMetaData(messageType, keyValueMetaData, parquetMetadata.getCreated_by()), blocks);
}

Example 2 with RowGroup

use of org.apache.parquet.format.RowGroup in project parquet-mr by apache.

the class ParquetMetadataConverter method toParquetMetadata.

public FileMetaData toParquetMetadata(int currentVersion, ParquetMetadata parquetMetadata) {
    List<BlockMetaData> blocks = parquetMetadata.getBlocks();
    List<RowGroup> rowGroups = new ArrayList<RowGroup>();
    long numRows = 0;
    for (BlockMetaData block : blocks) {
        numRows += block.getRowCount();
        addRowGroup(parquetMetadata, rowGroups, block);
    }
    FileMetaData fileMetaData = new FileMetaData(currentVersion, toParquetSchema(parquetMetadata.getFileMetaData().getSchema()), numRows, rowGroups);
    Set<Entry<String, String>> keyValues = parquetMetadata.getFileMetaData().getKeyValueMetaData().entrySet();
    for (Entry<String, String> keyValue : keyValues) {
        addKeyValue(fileMetaData, keyValue.getKey(), keyValue.getValue());
    }
    fileMetaData.setCreated_by(parquetMetadata.getFileMetaData().getCreatedBy());
    fileMetaData.setColumn_orders(getColumnOrders(parquetMetadata.getFileMetaData().getSchema()));
    return fileMetaData;
}

Example 3 with RowGroup

use of org.apache.parquet.format.RowGroup in project parquet-mr by apache.

the class ParquetMetadataConverter method filterFileMetaDataByStart.

// Visible for testing
static FileMetaData filterFileMetaDataByStart(FileMetaData metaData, OffsetMetadataFilter filter) {
    List<RowGroup> rowGroups = metaData.getRow_groups();
    List<RowGroup> newRowGroups = new ArrayList<RowGroup>();
    for (RowGroup rowGroup : rowGroups) {
        long startIndex = getOffset(rowGroup.getColumns().get(0));
        if (filter.contains(startIndex)) {
            newRowGroups.add(rowGroup);
        }
    }
    metaData.setRow_groups(newRowGroups);
    return metaData;
}

Example 4 with RowGroup

use of org.apache.parquet.format.RowGroup in project parquet-mr by apache.

the class TestParquetMetadataConverter method metadata.

private FileMetaData metadata(long... sizes) {
    List<SchemaElement> schema = emptyList();
    List<RowGroup> rowGroups = new ArrayList<RowGroup>();
    long offset = 0;
    for (long size : sizes) {
        ColumnChunk columnChunk = new ColumnChunk(offset);
        columnChunk.setMeta_data(new ColumnMetaData(INT32, Collections.<org.apache.parquet.format.Encoding>emptyList(), Collections.<String>emptyList(), UNCOMPRESSED, 10l, size * 2, size, offset));
        rowGroups.add(new RowGroup(Arrays.asList(columnChunk), size, 1));
        offset += size;
    }
    return new FileMetaData(1, schema, sizes.length, rowGroups);
}

Example 5 with RowGroup

use of org.apache.parquet.format.RowGroup in project parquet-mr by apache.

the class ParquetMetadataConverter method addRowGroup.

private void addRowGroup(ParquetMetadata parquetMetadata, List<RowGroup> rowGroups, BlockMetaData block) {
    // rowGroup.total_byte_size = ;
    List<ColumnChunkMetaData> columns = block.getColumns();
    List<ColumnChunk> parquetColumns = new ArrayList<ColumnChunk>();
    for (ColumnChunkMetaData columnMetaData : columns) {
        // verify this is the right offset
        ColumnChunk columnChunk = new ColumnChunk(columnMetaData.getFirstDataPageOffset());
        // they are in the same file for now
        columnChunk.file_path = block.getPath();
        columnChunk.meta_data = new ColumnMetaData(getType(columnMetaData.getType()), toFormatEncodings(columnMetaData.getEncodings()), Arrays.asList(columnMetaData.getPath().toArray()), toFormatCodec(columnMetaData.getCodec()), columnMetaData.getValueCount(), columnMetaData.getTotalUncompressedSize(), columnMetaData.getTotalSize(), columnMetaData.getFirstDataPageOffset());
        columnChunk.meta_data.dictionary_page_offset = columnMetaData.getDictionaryPageOffset();
        if (!columnMetaData.getStatistics().isEmpty()) {
            columnChunk.meta_data.setStatistics(toParquetStatistics(columnMetaData.getStatistics()));
        }
        if (columnMetaData.getEncodingStats() != null) {
            columnChunk.meta_data.setEncoding_stats(convertEncodingStats(columnMetaData.getEncodingStats()));
        }
        // columnChunk.meta_data.index_page_offset = ;
        // columnChunk.meta_data.key_value_metadata = ; // nothing yet
        parquetColumns.add(columnChunk);
    }
    RowGroup rowGroup = new RowGroup(parquetColumns, block.getTotalByteSize(), block.getRowCount());
    rowGroups.add(rowGroup);
}