Examples with ObjectReader org.apache.drill.exec.vector.accessor.ObjectReader used on opensource projects

Example 11 with ObjectReader

use of org.apache.drill.exec.vector.accessor.ObjectReader in project drill by apache.

the class TestVariantAccessors method testListOfUnions.

/**
 * Test a union list.
 */
@Test
public void testListOfUnions() {
    final TupleMetadata schema = new SchemaBuilder().addList("list").addType(MinorType.INT).addType(MinorType.VARCHAR).resumeSchema().buildSchema();
    final ExtendableRowSet rowSet = fixture.rowSet(schema);
    final RowSetWriter writer = rowSet.writer();
    {
        final ObjectWriter listObj = writer.column(0);
        assertEquals(ObjectType.ARRAY, listObj.type());
        final ArrayWriter listArray = listObj.array();
        final ObjectWriter itemObj = listArray.entry();
        assertEquals(ObjectType.VARIANT, itemObj.type());
        final VariantWriter variant = itemObj.variant();
        final ScalarWriter intWriter = variant.scalar(MinorType.INT);
        final ScalarWriter strWriter = variant.scalar(MinorType.VARCHAR);
        // First row: (1, "two", 3)
        variant.setType(MinorType.INT);
        intWriter.setInt(1);
        listArray.save();
        variant.setType(MinorType.VARCHAR);
        strWriter.setString("two");
        listArray.save();
        variant.setType(MinorType.INT);
        intWriter.setInt(3);
        listArray.save();
        writer.save();
        // Second row: null
        writer.save();
        // Third row: 4, null, "six", null int, null string
        variant.setType(MinorType.INT);
        intWriter.setInt(4);
        listArray.save();
        variant.setNull();
        listArray.save();
        variant.setType(MinorType.VARCHAR);
        strWriter.setString("six");
        listArray.save();
        variant.setType(MinorType.INT);
        intWriter.setNull();
        listArray.save();
        variant.setType(MinorType.VARCHAR);
        intWriter.setNull();
        listArray.save();
        writer.save();
        // Fourth row: empty array.
        listArray.setNull(false);
        writer.save();
        // Fifth row: 9
        variant.setType(MinorType.INT);
        intWriter.setInt(9);
        listArray.save();
        writer.save();
    }
    final SingleRowSet result = writer.done();
    assertEquals(5, result.rowCount());
    {
        final RowSetReader reader = result.reader();
        final ObjectReader listObj = reader.column(0);
        assertEquals(ObjectType.ARRAY, listObj.type());
        final ArrayReader listArray = listObj.array();
        assertEquals(ObjectType.VARIANT, listArray.entry().type());
        final VariantReader variant = listArray.variant();
        final ScalarReader intReader = variant.scalar(MinorType.INT);
        final ScalarReader strReader = variant.scalar(MinorType.VARCHAR);
        // First row: (1, "two", 3)
        assertTrue(reader.next());
        assertFalse(listArray.isNull());
        assertEquals(3, listArray.size());
        assertTrue(listArray.next());
        assertEquals(MinorType.INT, variant.dataType());
        assertFalse(intReader.isNull());
        assertTrue(strReader.isNull());
        assertEquals(1, intReader.getInt());
        assertEquals(1, variant.scalar().getInt());
        assertTrue(listArray.next());
        assertEquals(MinorType.VARCHAR, variant.dataType());
        assertTrue(intReader.isNull());
        assertFalse(strReader.isNull());
        assertEquals("two", strReader.getString());
        assertEquals("two", variant.scalar().getString());
        assertTrue(listArray.next());
        assertEquals(MinorType.INT, variant.dataType());
        assertEquals(3, intReader.getInt());
        assertFalse(listArray.next());
        // Second row: null
        assertTrue(reader.next());
        assertTrue(listArray.isNull());
        assertEquals(0, listArray.size());
        // Third row: 4, null, "six", null int, null string
        assertTrue(reader.next());
        assertEquals(5, listArray.size());
        assertTrue(listArray.next());
        assertEquals(4, intReader.getInt());
        assertTrue(listArray.next());
        assertTrue(variant.isNull());
        assertTrue(listArray.next());
        assertEquals("six", strReader.getString());
        assertTrue(listArray.next());
        assertEquals(MinorType.INT, variant.dataType());
        assertTrue(intReader.isNull());
        assertTrue(listArray.next());
        assertEquals(MinorType.VARCHAR, variant.dataType());
        assertTrue(strReader.isNull());
        assertFalse(listArray.next());
        // Fourth row: empty array.
        assertTrue(reader.next());
        assertFalse(listArray.isNull());
        assertEquals(0, listArray.size());
        assertFalse(listArray.next());
        // Fifth row: 9
        assertTrue(reader.next());
        assertEquals(1, listArray.size());
        assertTrue(listArray.next());
        assertEquals(9, intReader.getInt());
        assertFalse(listArray.next());
        assertFalse(reader.next());
    }
    result.clear();
}

Example 12 with ObjectReader

use of org.apache.drill.exec.vector.accessor.ObjectReader in project drill by apache.

the class TestAnalyze method verifyAnalyzeOutput.

// Helper function to verify output of ANALYZE statement
private void verifyAnalyzeOutput(String query, String message) throws Exception {
    DirectRowSet rowSet = queryBuilder().sql(query).rowSet();
    try {
        assertEquals(1, rowSet.rowCount());
        RowSetReader reader = rowSet.reader();
        assertEquals(2, reader.columnCount());
        while (reader.next()) {
            ObjectReader column = reader.column(1);
            assertEquals(message, column.isNull() ? null : column.getObject().toString());
        }
    } finally {
        rowSet.clear();
    }
}

Example 13 with ObjectReader

use of org.apache.drill.exec.vector.accessor.ObjectReader in project drill by apache.

the class MetadataControllerBatch method getMetadataStatistics.

private List<StatisticsHolder<?>> getMetadataStatistics(TupleReader reader, TupleMetadata columnMetadata) {
    List<StatisticsHolder<?>> metadataStatistics = new ArrayList<>();
    String rgs = columnNamesOptions.rowGroupStart();
    String rgl = columnNamesOptions.rowGroupLength();
    for (ColumnMetadata column : columnMetadata) {
        String columnName = column.name();
        ObjectReader objectReader = reader.column(columnName);
        if (AnalyzeColumnUtils.isMetadataStatisticsField(columnName)) {
            metadataStatistics.add(new StatisticsHolder<>(objectReader.getObject(), AnalyzeColumnUtils.getStatisticsKind(columnName)));
        } else if (!objectReader.isNull()) {
            if (columnName.equals(rgs)) {
                metadataStatistics.add(new StatisticsHolder<>(Long.parseLong(objectReader.scalar().getString()), new BaseStatisticsKind<>(ExactStatisticsConstants.START, true)));
            } else if (columnName.equals(rgl)) {
                metadataStatistics.add(new StatisticsHolder<>(Long.parseLong(objectReader.scalar().getString()), new BaseStatisticsKind<>(ExactStatisticsConstants.LENGTH, true)));
            }
        }
    }
    return metadataStatistics;
}

Example 14 with ObjectReader

use of org.apache.drill.exec.vector.accessor.ObjectReader in project drill by apache.

the class MetadataControllerBatch method getMetadataUnits.

private List<TableMetadataUnit> getMetadataUnits(TupleReader reader, int nestingLevel) {
    List<TableMetadataUnit> metadataUnits = new ArrayList<>();
    TupleMetadata columnMetadata = reader.tupleSchema();
    ObjectReader metadataColumnReader = reader.column(MetastoreAnalyzeConstants.METADATA_TYPE);
    Preconditions.checkNotNull(metadataColumnReader, "metadataType column wasn't found");
    ObjectReader underlyingMetadataReader = reader.column(MetastoreAnalyzeConstants.COLLECTED_MAP_FIELD);
    if (underlyingMetadataReader != null) {
        if (!underlyingMetadataReader.schema().isArray()) {
            throw new IllegalStateException("Incoming vector with name `collected_map` should be repeated map");
        }
        // current row contains information about underlying metadata
        ArrayReader array = underlyingMetadataReader.array();
        while (array.next()) {
            metadataUnits.addAll(getMetadataUnits(array.tuple(), nestingLevel + 1));
        }
    }
    List<StatisticsHolder<?>> metadataStatistics = getMetadataStatistics(reader, columnMetadata);
    Long rowCount = (Long) metadataStatistics.stream().filter(statisticsHolder -> statisticsHolder.getStatisticsKind() == TableStatisticsKind.ROW_COUNT).findAny().map(StatisticsHolder::getStatisticsValue).orElse(null);
    Map<SchemaPath, ColumnStatistics<?>> columnStatistics = getColumnStatistics(reader, columnMetadata, rowCount);
    MetadataType metadataType = MetadataType.valueOf(metadataColumnReader.scalar().getString());
    BaseMetadata metadata;
    switch(metadataType) {
        case TABLE:
            {
                metadata = getTableMetadata(reader, metadataStatistics, columnStatistics);
                break;
            }
        case SEGMENT:
            {
                metadata = getSegmentMetadata(reader, metadataStatistics, columnStatistics, nestingLevel);
                break;
            }
        case PARTITION:
            {
                metadata = getPartitionMetadata(reader, metadataStatistics, columnStatistics, nestingLevel);
                break;
            }
        case FILE:
            {
                metadata = getFileMetadata(reader, metadataStatistics, columnStatistics, nestingLevel);
                break;
            }
        case ROW_GROUP:
            {
                metadata = getRowGroupMetadata(reader, metadataStatistics, columnStatistics, nestingLevel);
                break;
            }
        default:
            throw new UnsupportedOperationException("Unsupported metadata type: " + metadataType);
    }
    metadataUnits.add(metadata.toMetadataUnit());
    return metadataUnits;
}