| package org.apache.drill.exec.store.phoenix; |
| |
| import java.util.List; |
| |
| import org.apache.drill.common.exceptions.ChildErrorContext; |
| import org.apache.drill.common.exceptions.ExecutionSetupException; |
| import org.apache.drill.common.exceptions.UserException; |
| import org.apache.drill.common.types.TypeProtos.MinorType; |
| import org.apache.drill.common.types.Types; |
| import org.apache.drill.exec.ops.ExecutorFragmentContext; |
| import org.apache.drill.exec.physical.impl.BatchCreator; |
| import org.apache.drill.exec.physical.impl.scan.framework.ManagedReader; |
| import org.apache.drill.exec.physical.impl.scan.framework.ManagedScanFramework; |
| import org.apache.drill.exec.physical.impl.scan.framework.ManagedScanFramework.ReaderFactory; |
| import org.apache.drill.exec.physical.impl.scan.framework.ManagedScanFramework.ScanFrameworkBuilder; |
| import org.apache.drill.exec.physical.impl.scan.framework.SchemaNegotiator; |
| import org.apache.drill.exec.record.CloseableRecordBatch; |
| import org.apache.drill.exec.record.RecordBatch; |
| import org.apache.drill.exec.server.options.OptionManager; |
| |
| public class PhoenixScanBatchCreator implements BatchCreator<PhoenixSubScan> { |
| |
| @Override |
| public CloseableRecordBatch getBatch(ExecutorFragmentContext context, PhoenixSubScan subScan, List<RecordBatch> children) throws ExecutionSetupException { |
| try { |
| ScanFrameworkBuilder builder = createBuilder(context.getOptions(), subScan); |
| return builder.buildScanOperator(context, subScan); |
| } catch (UserException e) { |
| throw e; |
| } catch (Throwable e) { |
| throw new ExecutionSetupException(e); |
| } |
| } |
| |
| private ScanFrameworkBuilder createBuilder(OptionManager options, PhoenixSubScan subScan) { |
| ScanFrameworkBuilder builder = new ScanFrameworkBuilder(); |
| builder.projection(subScan.getColumns()); |
| builder.setUserName(subScan.getUserName()); |
| |
| builder.errorContext(new ChildErrorContext(builder.errorContext()) { |
| |
| @Override |
| public void addContext(UserException.Builder builder) { |
| builder.addContext("tableName", subScan.getScanSpec().getTableName()); |
| } |
| |
| }); |
| |
| ReaderFactory readerFactory = new PhoenixReaderFactory(subScan); |
| builder.setReaderFactory(readerFactory); |
| builder.nullType(Types.optional(MinorType.VARCHAR)); |
| |
| return builder; |
| } |
| |
| private static class PhoenixReaderFactory implements ReaderFactory { |
| |
| private final PhoenixSubScan subScan; |
| private int count; |
| |
| public PhoenixReaderFactory(PhoenixSubScan subScan) { |
| this.subScan = subScan; |
| } |
| |
| @Override |
| public void bind(ManagedScanFramework framework) { } |
| |
| @Override |
| public ManagedReader<? extends SchemaNegotiator> next() { |
| String tableName = subScan.getScanSpec().getTableName(); |
| if (count++ == 0) { |
| if (tableName.startsWith("my")) { |
| return new PhoenixBatchReader(subScan); |
| } |
| } |
| return null; |
| } |
| } |
| } |