Examples with BasicScanFactory org.apache.drill.exec.physical.impl.scan.framework.BasicScanFactory used on opensource projects

Example 1 with BasicScanFactory

use of org.apache.drill.exec.physical.impl.scan.framework.BasicScanFactory in project drill by apache.

the class JdbcScanBatchCreator method createBuilder.

private ScanFrameworkBuilder createBuilder(OptionManager options, JdbcSubScan subScan) {
    JdbcStorageConfig config = subScan.getConfig();
    ScanFrameworkBuilder builder = new ScanFrameworkBuilder();
    builder.projection(subScan.getColumns());
    builder.setUserName(subScan.getUserName());
    JdbcStoragePlugin plugin = subScan.getPlugin();
    List<ManagedReader<SchemaNegotiator>> readers = Collections.singletonList(new JdbcBatchReader(plugin.getDataSource(), subScan.getSql(), subScan.getColumns()));
    ManagedScanFramework.ReaderFactory readerFactory = new BasicScanFactory(readers.iterator());
    builder.setReaderFactory(readerFactory);
    builder.nullType(Types.optional(MinorType.VARCHAR));
    return builder;
}

Example 2 with BasicScanFactory

use of org.apache.drill.exec.physical.impl.scan.framework.BasicScanFactory in project drill by apache.

the class MockScanBatchCreator method extendedMockScan.

private CloseableRecordBatch extendedMockScan(FragmentContext context, MockSubScanPOP config, List<MockScanEntry> entries) {
    List<SchemaPath> projList = new LinkedList<>();
    projList.add(SchemaPath.STAR_COLUMN);
    // Create batch readers up front. Handy when we know there are
    // only one or two; else use an iterator and create them on the fly.
    final List<ManagedReader<SchemaNegotiator>> readers = new LinkedList<>();
    for (final MockTableDef.MockScanEntry e : entries) {
        readers.add(new ExtendedMockBatchReader(e));
    }
    // Limit the batch size to 10 MB, or whatever the operator definition
    // specified.
    int batchSizeBytes = 10 * 1024 * 1024;
    MockTableDef.MockScanEntry first = entries.get(0);
    if (first.getBatchSize() > 0) {
        batchSizeBytes = first.getBatchSize();
    }
    // Set the scan to allow the maximum row count, allowing
    // each reader to adjust the batch size smaller if desired.
    ScanFrameworkBuilder builder = new ScanFrameworkBuilder();
    builder.batchByteLimit(batchSizeBytes);
    builder.projection(projList);
    builder.setReaderFactory(new BasicScanFactory(readers.iterator()));
    ManagedScanFramework framework = new ManagedScanFramework(builder);
    return new OperatorRecordBatch(context, config, new ScanOperatorExec(framework, false), false);
}