Examples with ColumnStatisticMetadata com.facebook.presto.spi.statistics.ColumnStatisticMetadata used on opensource projects

Example 6 with ColumnStatisticMetadata

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

the class TestStatisticsWriterNode method createTestDescriptor.

private static StatisticAggregationsDescriptor<VariableReferenceExpression> createTestDescriptor() {
    StatisticAggregationsDescriptor.Builder<VariableReferenceExpression> builder = StatisticAggregationsDescriptor.builder();
    PlanVariableAllocator variableAllocator = new PlanVariableAllocator();
    for (String column : COLUMNS) {
        for (ColumnStatisticType type : ColumnStatisticType.values()) {
            builder.addColumnStatistic(new ColumnStatisticMetadata(column, type), testVariable(variableAllocator));
        }
        builder.addGrouping(column, testVariable(variableAllocator));
    }
    builder.addTableStatistic(ROW_COUNT, testVariable(variableAllocator));
    return builder.build();
}