| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.drill.exec.store.iceberg.read; |
| |
| import org.apache.drill.common.exceptions.ExecutionSetupException; |
| import org.apache.drill.common.exceptions.UserException; |
| import org.apache.drill.common.types.TypeProtos; |
| 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.BasicScanFactory; |
| 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.SchemaNegotiator; |
| import org.apache.drill.exec.record.CloseableRecordBatch; |
| import org.apache.drill.exec.record.RecordBatch; |
| import org.apache.drill.exec.store.iceberg.IcebergSubScan; |
| import org.apache.drill.exec.store.iceberg.IcebergWork; |
| import com.google.common.base.Preconditions; |
| import org.apache.iceberg.TableScan; |
| |
| import java.util.List; |
| |
| @SuppressWarnings("unused") |
| public class IcebergScanBatchCreator implements BatchCreator<IcebergSubScan> { |
| |
| @Override |
| public CloseableRecordBatch getBatch(ExecutorFragmentContext context, |
| IcebergSubScan subScan, List<RecordBatch> children) throws ExecutionSetupException { |
| Preconditions.checkArgument(children.isEmpty()); |
| |
| try { |
| ManagedScanFramework.ScanFrameworkBuilder builder = createBuilder(subScan); |
| return builder.buildScanOperator(context, subScan); |
| } catch (UserException e) { |
| // Rethrow user exceptions directly |
| throw e; |
| } catch (Throwable e) { |
| // Wrap all others |
| throw new ExecutionSetupException(e); |
| } |
| } |
| |
| private ManagedScanFramework.ScanFrameworkBuilder createBuilder(IcebergSubScan subScan) { |
| ManagedScanFramework.ScanFrameworkBuilder builder = new ManagedScanFramework.ScanFrameworkBuilder(); |
| builder.projection(subScan.getColumns()); |
| builder.setUserName(subScan.getUserName()); |
| builder.providedSchema(subScan.getSchema()); |
| |
| ManagedScanFramework.ReaderFactory readerFactory = new BasicScanFactory( |
| subScan.getWorkList().stream() |
| .map(icebergWork -> getRecordReader(subScan.getTableScan(), icebergWork, subScan.getMaxRecords())) |
| .iterator()); |
| builder.setReaderFactory(readerFactory); |
| builder.nullType(Types.optional(TypeProtos.MinorType.VARCHAR)); |
| return builder; |
| } |
| |
| private static ManagedReader<SchemaNegotiator> getRecordReader(TableScan tableScan, IcebergWork icebergWork, int maxRecords) { |
| return new IcebergRecordReader(tableScan, icebergWork, maxRecords); |
| } |
| } |