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Example 1 with OperatorRecordBatch

use of org.apache.drill.exec.physical.impl.protocol.OperatorRecordBatch 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);
}
Also used : ScanFrameworkBuilder(org.apache.drill.exec.physical.impl.scan.framework.ManagedScanFramework.ScanFrameworkBuilder) MockScanEntry(org.apache.drill.exec.store.mock.MockTableDef.MockScanEntry) ManagedReader(org.apache.drill.exec.physical.impl.scan.framework.ManagedReader) LinkedList(java.util.LinkedList) BasicScanFactory(org.apache.drill.exec.physical.impl.scan.framework.BasicScanFactory) ManagedScanFramework(org.apache.drill.exec.physical.impl.scan.framework.ManagedScanFramework) SchemaPath(org.apache.drill.common.expression.SchemaPath) ScanOperatorExec(org.apache.drill.exec.physical.impl.scan.ScanOperatorExec) OperatorRecordBatch(org.apache.drill.exec.physical.impl.protocol.OperatorRecordBatch)

Aggregations

LinkedList (java.util.LinkedList)1 SchemaPath (org.apache.drill.common.expression.SchemaPath)1 OperatorRecordBatch (org.apache.drill.exec.physical.impl.protocol.OperatorRecordBatch)1 ScanOperatorExec (org.apache.drill.exec.physical.impl.scan.ScanOperatorExec)1 BasicScanFactory (org.apache.drill.exec.physical.impl.scan.framework.BasicScanFactory)1 ManagedReader (org.apache.drill.exec.physical.impl.scan.framework.ManagedReader)1 ManagedScanFramework (org.apache.drill.exec.physical.impl.scan.framework.ManagedScanFramework)1 ScanFrameworkBuilder (org.apache.drill.exec.physical.impl.scan.framework.ManagedScanFramework.ScanFrameworkBuilder)1 MockScanEntry (org.apache.drill.exec.store.mock.MockTableDef.MockScanEntry)1