Examples with TableStats org.apache.flink.table.plan.stats.TableStats used on opensource projects

Example 1 with TableStats

use of org.apache.flink.table.plan.stats.TableStats in project flink by apache.

the class PushPartitionIntoTableSourceScanRule method onMatch.

@Override
public void onMatch(RelOptRuleCall call) {
    Filter filter = call.rel(0);
    LogicalTableScan scan = call.rel(1);
    TableSourceTable tableSourceTable = scan.getTable().unwrap(TableSourceTable.class);
    RelDataType inputFieldTypes = filter.getInput().getRowType();
    List<String> inputFieldNames = inputFieldTypes.getFieldNames();
    List<String> partitionFieldNames = tableSourceTable.contextResolvedTable().<ResolvedCatalogTable>getResolvedTable().getPartitionKeys();
    // extract partition predicates
    RelBuilder relBuilder = call.builder();
    RexBuilder rexBuilder = relBuilder.getRexBuilder();
    Tuple2<Seq<RexNode>, Seq<RexNode>> allPredicates = RexNodeExtractor.extractPartitionPredicateList(filter.getCondition(), FlinkRelOptUtil.getMaxCnfNodeCount(scan), inputFieldNames.toArray(new String[0]), rexBuilder, partitionFieldNames.toArray(new String[0]));
    RexNode partitionPredicate = RexUtil.composeConjunction(rexBuilder, JavaConversions.seqAsJavaList(allPredicates._1));
    if (partitionPredicate.isAlwaysTrue()) {
        return;
    }
    // build pruner
    LogicalType[] partitionFieldTypes = partitionFieldNames.stream().map(name -> {
        int index = inputFieldNames.indexOf(name);
        if (index < 0) {
            throw new TableException(String.format("Partitioned key '%s' isn't found in input columns. " + "Validator should have checked that.", name));
        }
        return inputFieldTypes.getFieldList().get(index).getType();
    }).map(FlinkTypeFactory::toLogicalType).toArray(LogicalType[]::new);
    RexNode finalPartitionPredicate = adjustPartitionPredicate(inputFieldNames, partitionFieldNames, partitionPredicate);
    FlinkContext context = ShortcutUtils.unwrapContext(scan);
    Function<List<Map<String, String>>, List<Map<String, String>>> defaultPruner = partitions -> PartitionPruner.prunePartitions(context.getTableConfig(), partitionFieldNames.toArray(new String[0]), partitionFieldTypes, partitions, finalPartitionPredicate);
    // prune partitions
    List<Map<String, String>> remainingPartitions = readPartitionsAndPrune(rexBuilder, context, tableSourceTable, defaultPruner, allPredicates._1(), inputFieldNames);
    // apply push down
    DynamicTableSource dynamicTableSource = tableSourceTable.tableSource().copy();
    PartitionPushDownSpec partitionPushDownSpec = new PartitionPushDownSpec(remainingPartitions);
    partitionPushDownSpec.apply(dynamicTableSource, SourceAbilityContext.from(scan));
    // build new statistic
    TableStats newTableStat = null;
    if (tableSourceTable.contextResolvedTable().isPermanent()) {
        ObjectIdentifier identifier = tableSourceTable.contextResolvedTable().getIdentifier();
        ObjectPath tablePath = identifier.toObjectPath();
        Catalog catalog = tableSourceTable.contextResolvedTable().getCatalog().get();
        for (Map<String, String> partition : remainingPartitions) {
            Optional<TableStats> partitionStats = getPartitionStats(catalog, tablePath, partition);
            if (!partitionStats.isPresent()) {
                // clear all information before
                newTableStat = null;
                break;
            } else {
                newTableStat = newTableStat == null ? partitionStats.get() : newTableStat.merge(partitionStats.get());
            }
        }
    }
    FlinkStatistic newStatistic = FlinkStatistic.builder().statistic(tableSourceTable.getStatistic()).tableStats(newTableStat).build();
    TableSourceTable newTableSourceTable = tableSourceTable.copy(dynamicTableSource, newStatistic, new SourceAbilitySpec[] { partitionPushDownSpec });
    LogicalTableScan newScan = LogicalTableScan.create(scan.getCluster(), newTableSourceTable, scan.getHints());
    // transform to new node
    RexNode nonPartitionPredicate = RexUtil.composeConjunction(rexBuilder, JavaConversions.seqAsJavaList(allPredicates._2()));
    if (nonPartitionPredicate.isAlwaysTrue()) {
        call.transformTo(newScan);
    } else {
        Filter newFilter = filter.copy(filter.getTraitSet(), newScan, nonPartitionPredicate);
        call.transformTo(newFilter);
    }
}

Example 2 with TableStats

use of org.apache.flink.table.plan.stats.TableStats in project flink by apache.

the class PushPartitionIntoTableSourceScanRule method getPartitionStats.

private Optional<TableStats> getPartitionStats(Catalog catalog, ObjectPath tablePath, Map<String, String> partition) {
    try {
        CatalogPartitionSpec spec = new CatalogPartitionSpec(partition);
        CatalogTableStatistics partitionStat = catalog.getPartitionStatistics(tablePath, spec);
        CatalogColumnStatistics partitionColStat = catalog.getPartitionColumnStatistics(tablePath, spec);
        TableStats stats = CatalogTableStatisticsConverter.convertToTableStats(partitionStat, partitionColStat);
        return Optional.of(stats);
    } catch (PartitionNotExistException e) {
        return Optional.empty();
    }
}

Example 3 with TableStats

use of org.apache.flink.table.plan.stats.TableStats in project flink by apache.

the class PushLimitIntoTableSourceScanRule method applyLimit.

private TableSourceTable applyLimit(long limit, FlinkLogicalTableSourceScan scan) {
    TableSourceTable relOptTable = scan.getTable().unwrap(TableSourceTable.class);
    TableSourceTable oldTableSourceTable = relOptTable.unwrap(TableSourceTable.class);
    DynamicTableSource newTableSource = oldTableSourceTable.tableSource().copy();
    LimitPushDownSpec limitPushDownSpec = new LimitPushDownSpec(limit);
    limitPushDownSpec.apply(newTableSource, SourceAbilityContext.from(scan));
    FlinkStatistic statistic = relOptTable.getStatistic();
    final long newRowCount;
    if (statistic.getRowCount() != null) {
        newRowCount = Math.min(limit, statistic.getRowCount().longValue());
    } else {
        newRowCount = limit;
    }
    // update TableStats after limit push down
    TableStats newTableStats = new TableStats(newRowCount);
    FlinkStatistic newStatistic = FlinkStatistic.builder().statistic(statistic).tableStats(newTableStats).build();
    return oldTableSourceTable.copy(newTableSource, newStatistic, new SourceAbilitySpec[] { limitPushDownSpec });
}