Examples with ColumnReaders io.prestosql.orc.reader.ColumnReaders used on opensource projects

Example 1 with ColumnReaders

use of io.prestosql.orc.reader.ColumnReaders in project hetu-core by openlookeng.

the class OrcRecordReader method createColumnReaders.

private ColumnReader[] createColumnReaders(List<OrcColumn> columns, List<Type> readTypes, AggregatedMemoryContext systemMemoryContext, OrcBlockFactory blockFactory, OrcCacheStore orcCacheStore, OrcCacheProperties orcCacheProperties) throws OrcCorruptionException {
    ColumnReader[] columnReaders = new ColumnReader[columns.size()];
    for (int i = 0; i < columns.size(); i++) {
        int columnIndex = i;
        Type readType = readTypes.get(columnIndex);
        OrcColumn column = columns.get(columnIndex);
        ColumnReader columnReader = createColumnReader(readType, column, systemMemoryContext, blockFactory.createNestedBlockFactory(block -> blockLoaded(columnIndex, block)));
        if (orcCacheProperties.isRowDataCacheEnabled()) {
            columnReader = ColumnReaders.wrapWithCachingStreamReader(columnReader, column, orcCacheStore.getRowDataCache());
        }
        columnReaders[columnIndex] = columnReader;
    }
    return columnReaders;
}

Example 2 with ColumnReaders

use of io.prestosql.orc.reader.ColumnReaders in project hetu-core by openlookeng.

the class OrcSelectiveRecordReader method createColumnReaders.

public SelectiveColumnReader[] createColumnReaders(List<OrcColumn> fileColumns, AggregatedMemoryContext systemMemoryContext, OrcBlockFactory blockFactory, OrcCacheStore orcCacheStore, OrcCacheProperties orcCacheProperties, OrcPredicate predicate, Map<Integer, TupleDomainFilter> filters, DateTimeZone hiveStorageTimeZone, List<Integer> outputColumns, Map<Integer, Type> includedColumns, ColumnMetadata<OrcType> orcTypes, boolean useDataCache) throws OrcCorruptionException {
    int fieldCount = orcTypes.get(OrcColumnId.ROOT_COLUMN).getFieldCount();
    SelectiveColumnReader[] columnReaders = new SelectiveColumnReader[fieldCount];
    colReaderWithFilter = new IntArraySet();
    colReaderWithORFilter = new IntArraySet();
    colReaderWithoutFilter = new IntArraySet();
    IntArraySet remainingColumns = new IntArraySet();
    remainingColumns.addAll(includedColumns.keySet());
    for (int i = 0; i < fieldCount; i++) {
        // create column reader only for columns which are part of projection and filter.
        if (includedColumns.containsKey(i)) {
            int columnIndex = i;
            OrcColumn column = fileColumns.get(columnIndex);
            boolean outputRequired = outputColumns.contains(i);
            SelectiveColumnReader columnReader = null;
            if (useDataCache && orcCacheProperties.isRowDataCacheEnabled()) {
                ColumnReader cr = ColumnReaders.createColumnReader(includedColumns.get(i), column, systemMemoryContext, blockFactory.createNestedBlockFactory(block -> blockLoaded(columnIndex, block)));
                columnReader = SelectiveColumnReaders.wrapWithDataCachingStreamReader(cr, column, orcCacheStore.getRowDataCache());
            } else {
                columnReader = createColumnReader(orcTypes.get(column.getColumnId()), column, Optional.ofNullable(filters.get(i)), outputRequired ? Optional.of(includedColumns.get(i)) : Optional.empty(), hiveStorageTimeZone, systemMemoryContext);
                if (orcCacheProperties.isRowDataCacheEnabled()) {
                    columnReader = SelectiveColumnReaders.wrapWithResultCachingStreamReader(columnReader, column, predicate, orcCacheStore.getRowDataCache());
                }
            }
            columnReaders[columnIndex] = columnReader;
            if (filters.get(i) != null) {
                colReaderWithFilter.add(columnIndex);
            } else if (disjuctFilters.get(i) != null && disjuctFilters.get(i).size() > 0) {
                colReaderWithORFilter.add(columnIndex);
            } else {
                colReaderWithoutFilter.add(columnIndex);
            }
            remainingColumns.remove(columnIndex);
        }
    }
    /* if any still remaining colIdx < 0 */
    remainingColumns.removeAll(missingColumns);
    for (Integer col : remainingColumns) {
        if (col < 0) {
            /* should be always true! */
            if (filters.get(col) != null) {
                colReaderWithFilter.add(col);
            } else if (disjuctFilters.get(col) != null && disjuctFilters.get(col).size() > 0) {
                colReaderWithORFilter.add(col);
            }
        }
    }
    // specially for alter add column case:
    for (int missingColumn : missingColumns) {
        if (filters.get(missingColumn) != null) {
            colReaderWithFilter.add(missingColumn);
        } else if (disjuctFilters.get(missingColumn) != null && disjuctFilters.get(missingColumn).size() > 0) {
            colReaderWithORFilter.add(missingColumn);
        }
    }
    return columnReaders;
}