@VisibleForTesting static ColumnStatistics createDataColumnStatistics(String column, Type type, double rowsCount, Collection<PartitionStatistics> partitionStatistics) { List<HiveColumnStatistics> columnStatistics = partitionStatistics.stream() .map(PartitionStatistics::getColumnStatistics) .map(statistics -> statistics.get(column)) .filter(Objects::nonNull) .collect(toImmutableList()); if (columnStatistics.isEmpty()) { return ColumnStatistics.empty(); } return ColumnStatistics.builder() .setDistinctValuesCount(calculateDistinctValuesCount(columnStatistics)) .setNullsFraction(calculateNullsFraction(column, partitionStatistics)) .setDataSize(calculateDataSize(column, partitionStatistics, rowsCount)) .setRange(calculateRange(type, columnStatistics)) .build(); }
private ColumnStatistics toColumnStatistics(ColumnStatisticsData stats, Type columnType) { return ColumnStatistics.builder() .setNullsFraction(Estimate.zero()) .setDistinctValuesCount(stats.getDistinctValuesCount().map(Estimate::of).orElse(Estimate.unknown())) .setDataSize(stats.getDataSize().map(Estimate::of).orElse(Estimate.unknown())) .setRange(toRange(stats.getMin(), stats.getMax(), columnType)) .build(); }
private ColumnStatistics toColumnStatistics(ColumnStatisticsData columnStatisticsData, Type type, long rowCount) { ColumnStatistics.Builder columnStatistics = ColumnStatistics.builder(); long nullCount = columnStatisticsData.getNullsCount(); columnStatistics.setNullsFraction(Estimate.of((double) nullCount / rowCount)); columnStatistics.setRange(toRange(columnStatisticsData.getMin(), columnStatisticsData.getMax(), type)); columnStatistics.setDistinctValuesCount(Estimate.of(columnStatisticsData.getDistinctValuesCount())); columnStatistics.setDataSize(columnStatisticsData.getDataSize().map(Estimate::of).orElse(Estimate.unknown())); return columnStatistics.build(); }
.setNullsFraction(Estimate.of(0)) .setDistinctValuesCount(Estimate.of(6)) .setRange(new DoubleRange(1, 6)) .build()); .setNullsFraction(Estimate.of(0)) .setDistinctValuesCount(Estimate.of(1)) .setRange(new DoubleRange(-5, -5)) .build()); .setNullsFraction(Estimate.of(0)) .setDistinctValuesCount(Estimate.of(4)) .setRange(new DoubleRange(10227L, 11688L)) .build());
PARTITION_COLUMN_2, ColumnStatistics.builder() .setRange(new DoubleRange(1234, 1234)) .setNullsFraction(Estimate.of(0)) .setDistinctValuesCount(Estimate.of(1)) columnHandle, ColumnStatistics.builder() .setRange(new DoubleRange(-100, 100)) .setNullsFraction(Estimate.of(0.5)) .setDistinctValuesCount(Estimate.of(300))
@Test public void testGetTableStatisticsUnpartitioned() { PartitionStatistics statistics = PartitionStatistics.builder() .setBasicStatistics(new HiveBasicStatistics(OptionalLong.empty(), OptionalLong.of(1000), OptionalLong.empty(), OptionalLong.empty())) .setColumnStatistics(ImmutableMap.of(COLUMN, createIntegerColumnStatistics(OptionalLong.of(-100), OptionalLong.of(100), OptionalLong.of(500), OptionalLong.of(300)))) .build(); MetastoreHiveStatisticsProvider statisticsProvider = new MetastoreHiveStatisticsProvider((table, hivePartitions) -> ImmutableMap.of(UNPARTITIONED_ID, statistics)); TestingConnectorSession session = new TestingConnectorSession(new HiveSessionProperties(new HiveClientConfig(), new OrcFileWriterConfig(), new ParquetFileWriterConfig()).getSessionProperties()); HiveColumnHandle columnHandle = new HiveColumnHandle(COLUMN, HIVE_LONG, BIGINT.getTypeSignature(), 2, REGULAR, Optional.empty()); TableStatistics expected = TableStatistics.builder() .setRowCount(Estimate.of(1000)) .setColumnStatistics( columnHandle, ColumnStatistics.builder() .setRange(new DoubleRange(-100, 100)) .setNullsFraction(Estimate.of(0.5)) .setDistinctValuesCount(Estimate.of(300)) .build()) .build(); assertEquals( statisticsProvider.getTableStatistics( session, TABLE, ImmutableMap.of(COLUMN, columnHandle), ImmutableMap.of(COLUMN, BIGINT), ImmutableList.of(new HivePartition(TABLE))), expected); }
@Test public void testNullFraction() { SchemaTableName schemaTableName = new SchemaTableName("sf1", Table.WEB_SITE.getName()); ConnectorTableHandle tableHandle = metadata.getTableHandle(session, schemaTableName); TableStatistics tableStatistics = metadata.getTableStatistics(session, tableHandle, alwaysTrue()); Map<String, ColumnHandle> columnHandles = metadata.getColumnHandles(session, tableHandle); // some null values assertColumnStatistics( tableStatistics.getColumnStatistics().get(columnHandles.get(WebSiteColumn.WEB_REC_END_DATE.getName())), ColumnStatistics.builder() .setNullsFraction(Estimate.of(0.5)) .setDistinctValuesCount(Estimate.of(3)) .setRange(new DoubleRange(10819L, 11549L)) .build()); }
private static ColumnStatistics createColumnStatistics(Optional<Double> distinctValuesCount, Optional<DoubleRange> range, Optional<Double> dataSize) { return ColumnStatistics.builder() .setNullsFraction(Estimate.zero()) .setDistinctValuesCount(toEstimate(distinctValuesCount)) .setRange(range) .setDataSize(toEstimate(dataSize)) .build(); }
private ColumnStatistics toColumnStatistics(ColumnStatisticsData stats, Type columnType) { return ColumnStatistics.builder() .setNullsFraction(Estimate.zero()) .setDistinctValuesCount(stats.getDistinctValuesCount().map(Estimate::of).orElse(Estimate.unknown())) .setDataSize(stats.getDataSize().map(Estimate::of).orElse(Estimate.unknown())) .setRange(toRange(stats.getMin(), stats.getMax(), columnType)) .build(); }
private ColumnStatistics toColumnStatistics(ColumnStatisticsData columnStatisticsData, Type type, long rowCount) { ColumnStatistics.Builder columnStatistics = ColumnStatistics.builder(); long nullCount = columnStatisticsData.getNullsCount(); columnStatistics.setNullsFraction(Estimate.of((double) nullCount / rowCount)); columnStatistics.setRange(toRange(columnStatisticsData.getMin(), columnStatisticsData.getMax(), type)); columnStatistics.setDistinctValuesCount(Estimate.of(columnStatisticsData.getDistinctValuesCount())); columnStatistics.setDataSize(columnStatisticsData.getDataSize().map(Estimate::of).orElse(Estimate.unknown())); return columnStatistics.build(); }
.setNullsFraction(Estimate.of(0)) .setDistinctValuesCount(Estimate.of(6)) .setRange(new DoubleRange(1, 6)) .build()); .setNullsFraction(Estimate.of(0)) .setDistinctValuesCount(Estimate.of(1)) .setRange(new DoubleRange(-5, -5)) .build()); .setNullsFraction(Estimate.of(0)) .setDistinctValuesCount(Estimate.of(4)) .setRange(new DoubleRange(10227L, 11688L)) .build());
PARTITION_COLUMN_2, ColumnStatistics.builder() .setRange(new DoubleRange(1234, 1234)) .setNullsFraction(Estimate.of(0)) .setDistinctValuesCount(Estimate.of(1)) columnHandle, ColumnStatistics.builder() .setRange(new DoubleRange(-100, 100)) .setNullsFraction(Estimate.of(0.5)) .setDistinctValuesCount(Estimate.of(300))
@Test public void testGetTableStatisticsUnpartitioned() { PartitionStatistics statistics = PartitionStatistics.builder() .setBasicStatistics(new HiveBasicStatistics(OptionalLong.empty(), OptionalLong.of(1000), OptionalLong.empty(), OptionalLong.empty())) .setColumnStatistics(ImmutableMap.of(COLUMN, createIntegerColumnStatistics(OptionalLong.of(-100), OptionalLong.of(100), OptionalLong.of(500), OptionalLong.of(300)))) .build(); MetastoreHiveStatisticsProvider statisticsProvider = new MetastoreHiveStatisticsProvider((table, hivePartitions) -> ImmutableMap.of(UNPARTITIONED_ID, statistics)); TestingConnectorSession session = new TestingConnectorSession(new HiveSessionProperties(new HiveClientConfig(), new OrcFileWriterConfig(), new ParquetFileWriterConfig()).getSessionProperties()); HiveColumnHandle columnHandle = new HiveColumnHandle(COLUMN, HIVE_LONG, BIGINT.getTypeSignature(), 2, REGULAR, Optional.empty()); TableStatistics expected = TableStatistics.builder() .setRowCount(Estimate.of(1000)) .setColumnStatistics( columnHandle, ColumnStatistics.builder() .setRange(new DoubleRange(-100, 100)) .setNullsFraction(Estimate.of(0.5)) .setDistinctValuesCount(Estimate.of(300)) .build()) .build(); assertEquals( statisticsProvider.getTableStatistics( session, TABLE, ImmutableMap.of(COLUMN, columnHandle), ImmutableMap.of(COLUMN, BIGINT), ImmutableList.of(new HivePartition(TABLE))), expected); }
@Test public void testNullFraction() { SchemaTableName schemaTableName = new SchemaTableName("sf1", Table.WEB_SITE.getName()); ConnectorTableHandle tableHandle = metadata.getTableHandle(session, schemaTableName); TableStatistics tableStatistics = metadata.getTableStatistics(session, tableHandle, alwaysTrue()); Map<String, ColumnHandle> columnHandles = metadata.getColumnHandles(session, tableHandle); // some null values assertColumnStatistics( tableStatistics.getColumnStatistics().get(columnHandles.get(WebSiteColumn.WEB_REC_END_DATE.getName())), ColumnStatistics.builder() .setNullsFraction(Estimate.of(0.5)) .setDistinctValuesCount(Estimate.of(3)) .setRange(new DoubleRange(10819L, 11549L)) .build()); }
private static ColumnStatistics createPartitionColumnStatistics( HiveColumnHandle column, Type type, List<HivePartition> partitions, Map<String, PartitionStatistics> statistics, double averageRowsPerPartition, double rowCount) { return ColumnStatistics.builder() .setDistinctValuesCount(Estimate.of(calculateDistinctPartitionKeys(column, partitions, statistics, averageRowsPerPartition))) .setNullsFraction(Estimate.of(calculateNullsFractionForPartitioningKey(column, partitions, statistics, averageRowsPerPartition, rowCount))) .setRange(calculateRangeForPartitioningKey(column, type, partitions)) .setDataSize(calculateDataSizeForPartitioningKey(column, type, partitions, statistics, averageRowsPerPartition)) .build(); }
private static ColumnStatistics createColumnStatistics(Optional<Double> distinctValuesCount, Optional<DoubleRange> range, Optional<Double> dataSize) { return ColumnStatistics.builder() .setNullsFraction(Estimate.zero()) .setDistinctValuesCount(toEstimate(distinctValuesCount)) .setRange(range) .setDataSize(toEstimate(dataSize)) .build(); }