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Example 1 with TableStatisticType

use of com.facebook.presto.spi.statistics.TableStatisticType in project presto by prestodb.

the class StatisticsAggregationPlanner method createStatisticsAggregation.

public TableStatisticAggregation createStatisticsAggregation(TableStatisticsMetadata statisticsMetadata, Map<String, VariableReferenceExpression> columnToVariableMap, boolean useOriginalExpression) {
    StatisticAggregationsDescriptor.Builder<VariableReferenceExpression> descriptor = StatisticAggregationsDescriptor.builder();
    List<String> groupingColumns = statisticsMetadata.getGroupingColumns();
    List<VariableReferenceExpression> groupingVariables = groupingColumns.stream().map(columnToVariableMap::get).collect(toImmutableList());
    for (int i = 0; i < groupingVariables.size(); i++) {
        descriptor.addGrouping(groupingColumns.get(i), groupingVariables.get(i));
    }
    ImmutableMap.Builder<VariableReferenceExpression, AggregationNode.Aggregation> aggregations = ImmutableMap.builder();
    StandardFunctionResolution functionResolution = new FunctionResolution(metadata.getFunctionAndTypeManager());
    for (TableStatisticType type : statisticsMetadata.getTableStatistics()) {
        if (type != ROW_COUNT) {
            throw new PrestoException(NOT_SUPPORTED, "Table-wide statistic type not supported: " + type);
        }
        AggregationNode.Aggregation aggregation = new AggregationNode.Aggregation(new CallExpression("count", functionResolution.countFunction(), BIGINT, ImmutableList.of()), Optional.empty(), Optional.empty(), false, Optional.empty());
        VariableReferenceExpression variable = variableAllocator.newVariable("rowCount", BIGINT);
        aggregations.put(variable, aggregation);
        descriptor.addTableStatistic(ROW_COUNT, variable);
    }
    for (ColumnStatisticMetadata columnStatisticMetadata : statisticsMetadata.getColumnStatistics()) {
        String columnName = columnStatisticMetadata.getColumnName();
        ColumnStatisticType statisticType = columnStatisticMetadata.getStatisticType();
        VariableReferenceExpression inputVariable = columnToVariableMap.get(columnName);
        verify(inputVariable != null, "inputVariable is null");
        ColumnStatisticsAggregation aggregation = createColumnAggregation(statisticType, inputVariable, useOriginalExpression);
        VariableReferenceExpression variable = variableAllocator.newVariable(statisticType + ":" + columnName, aggregation.getOutputType());
        aggregations.put(variable, aggregation.getAggregation());
        descriptor.addColumnStatistic(columnStatisticMetadata, variable);
    }
    StatisticAggregations aggregation = new StatisticAggregations(aggregations.build(), groupingVariables);
    return new TableStatisticAggregation(aggregation, descriptor.build());
}
Also used : ColumnStatisticMetadata(com.facebook.presto.spi.statistics.ColumnStatisticMetadata) PrestoException(com.facebook.presto.spi.PrestoException) AggregationNode(com.facebook.presto.spi.plan.AggregationNode) StandardFunctionResolution(com.facebook.presto.spi.function.StandardFunctionResolution) FunctionResolution(com.facebook.presto.sql.relational.FunctionResolution) ImmutableMap(com.google.common.collect.ImmutableMap) StatisticAggregations(com.facebook.presto.sql.planner.plan.StatisticAggregations) VariableReferenceExpression(com.facebook.presto.spi.relation.VariableReferenceExpression) ColumnStatisticType(com.facebook.presto.spi.statistics.ColumnStatisticType) StatisticAggregationsDescriptor(com.facebook.presto.sql.planner.plan.StatisticAggregationsDescriptor) StandardFunctionResolution(com.facebook.presto.spi.function.StandardFunctionResolution) TableStatisticType(com.facebook.presto.spi.statistics.TableStatisticType) CallExpression(com.facebook.presto.spi.relation.CallExpression)

Aggregations

PrestoException (com.facebook.presto.spi.PrestoException)1 StandardFunctionResolution (com.facebook.presto.spi.function.StandardFunctionResolution)1 AggregationNode (com.facebook.presto.spi.plan.AggregationNode)1 CallExpression (com.facebook.presto.spi.relation.CallExpression)1 VariableReferenceExpression (com.facebook.presto.spi.relation.VariableReferenceExpression)1 ColumnStatisticMetadata (com.facebook.presto.spi.statistics.ColumnStatisticMetadata)1 ColumnStatisticType (com.facebook.presto.spi.statistics.ColumnStatisticType)1 TableStatisticType (com.facebook.presto.spi.statistics.TableStatisticType)1 StatisticAggregations (com.facebook.presto.sql.planner.plan.StatisticAggregations)1 StatisticAggregationsDescriptor (com.facebook.presto.sql.planner.plan.StatisticAggregationsDescriptor)1 FunctionResolution (com.facebook.presto.sql.relational.FunctionResolution)1 ImmutableMap (com.google.common.collect.ImmutableMap)1