| /* |
| * 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.physical.rowSet; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import org.apache.drill.categories.RowSetTest; |
| import org.apache.drill.common.types.TypeProtos.MinorType; |
| import org.apache.drill.exec.physical.rowSet.RowSet.ExtendableRowSet; |
| import org.apache.drill.exec.physical.rowSet.RowSet.SingleRowSet; |
| import org.apache.drill.exec.record.metadata.SchemaBuilder; |
| import org.apache.drill.exec.record.metadata.TupleMetadata; |
| import org.apache.drill.exec.record.selection.SelectionVector2; |
| import org.apache.drill.exec.vector.accessor.ArrayReader; |
| import org.apache.drill.exec.vector.accessor.ArrayWriter; |
| import org.apache.drill.exec.vector.accessor.ScalarReader; |
| import org.apache.drill.exec.vector.accessor.ScalarWriter; |
| import org.apache.drill.test.SubOperatorTest; |
| import org.apache.drill.test.rowSet.RowSetUtilities; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| |
| /** |
| * Test reading with an indirection vector (sv2.) This form of |
| * indirection vector reorders values within a single batch. |
| * Since the indirection occurs only in the reader index, only |
| * light testing is done; all readers go through the same index class, |
| * so if the index works for one reader, it will for for all. |
| */ |
| |
| @Category(RowSetTest.class) |
| public class TestIndirectReaders extends SubOperatorTest { |
| |
| /** |
| * Simplest case: required reader, uses the index |
| * directly. |
| */ |
| |
| @Test |
| public void testRequired() { |
| TupleMetadata schema = new SchemaBuilder() |
| .add("a", MinorType.INT) |
| .buildSchema(); |
| ExtendableRowSet rowSet = fixture.rowSet(schema); |
| RowSetWriter writer = rowSet.writer(); |
| |
| // 10 rows with value 0 .. 9 |
| |
| for (int i = 0; i < 10; i++) { |
| writer.scalar(0).setInt(i); |
| writer.save(); |
| } |
| |
| SingleRowSet result = writer.done().toIndirect(); |
| |
| // Use the SV2 to reverse the row order. |
| |
| SelectionVector2 sv2 = result.getSv2(); |
| for (int i = 0; i < 10; i++) { |
| sv2.setIndex(i, 9 - i); |
| } |
| |
| // Values should be read back in the reverse order. |
| |
| RowSetReader reader = result.reader(); |
| for (int i = 9; i >= 0; i--) { |
| assertTrue(reader.next()); |
| assertEquals(i, reader.scalar(0).getInt()); |
| } |
| |
| // The row set comparison should read using the |
| // indirection. |
| |
| SingleRowSet expected = fixture.rowSetBuilder(schema) |
| .addRow(9) |
| .addRow(8) |
| .addRow(7) |
| .addRow(6) |
| .addRow(5) |
| .addRow(4) |
| .addRow(3) |
| .addRow(2) |
| .addRow(1) |
| .addRow(0) |
| .build(); |
| |
| RowSetUtilities.verify(expected, result); |
| } |
| |
| /** |
| * More complex case with two levels of offset vector (one for the |
| * array, another for the Varchar values.) Only the top level goes |
| * through the indirection. |
| */ |
| |
| @Test |
| public void testArray() { |
| TupleMetadata schema = new SchemaBuilder() |
| .addArray("a", MinorType.VARCHAR) |
| .buildSchema(); |
| ExtendableRowSet rowSet = fixture.rowSet(schema); |
| RowSetWriter writer = rowSet.writer(); |
| ArrayWriter aWriter = writer.array(0); |
| ScalarWriter strWriter = aWriter.scalar(); |
| |
| for (int i = 0; i < 10; i++) { |
| for (int j = 0; j < 5; j++) { |
| strWriter.setString("value" + i + "." + j); |
| } |
| writer.save(); |
| } |
| |
| SingleRowSet result = writer.done().toIndirect(); |
| |
| SelectionVector2 sv2 = result.getSv2(); |
| for (int i = 0; i < 10; i++) { |
| sv2.setIndex(i, 9 - i); |
| } |
| |
| RowSetReader reader = result.reader(); |
| ArrayReader aReader = reader.array(0); |
| ScalarReader strReader = aReader.scalar(); |
| |
| for (int i = 9; i >= 0; i--) { |
| assertTrue(reader.next()); |
| for (int j = 0; j < 5; j++) { |
| assertTrue(aReader.next()); |
| assertEquals("value" + i + "." + j, strReader.getString()); |
| } |
| } |
| |
| result.clear(); |
| } |
| } |