pub(crate) fn read_aggregate(
        &self,
        predicate: Predicate,
        group_columns: &Selection<'_>,
        aggregates: &[(ColumnName<'_>, AggregateType)],
    ) -> Result<table::ReadAggregateResults> {
        self.table
            .read_aggregate(predicate, group_columns, aggregates)
            .context(TableError)
    }
/// Returns an iterable collection of data in group columns and aggregate
/// columns, optionally filtered by the provided predicate. Results are
/// merged across all row groups.
///
/// Note: `read_aggregate` currently only supports grouping on "tag"
/// columns.
Returns an iterable collection of data in group columns and aggregate
columns, optionally filtered by the provided predicate. Results are
merged across all row groups.

`read_aggregate` currently only supports grouping on "tag"
columns.
Returns an iterable collection of data in group columns and aggregate columns optionally filtered by the provided predicate . Results are merged across all row groups . ` read_aggregate ` currently only supports grouping on " tag " columns .
pub(crate) fn read_aggregate(
        &self,
        predicate: Predicate,
        group_columns: &Selection<'_>,
        aggregates: &[(ColumnName<'_>, AggregateType)],
    ) -> Result<table::ReadAggregateResults> {
        self.table
            .read_aggregate(predicate, group_columns, aggregates)
            .context(TableError)
    }
pub ( crate ) fn read_aggregate ( & self , predicate : Predicate , group_columns : & Selection < ' _ > , aggregates : & [ ( ColumnName < ' _ > , AggregateType ) ] , ) -> Result < table :: ReadAggregateResults > { self . table . read_aggregate ( predicate , group_columns , aggregates ) . context ( TableError ) }
Returns an iterable collection of data in group columns and aggregate
columns, optionally filtered by the provided predicate.
Returns an iterable collection of data in group columns and aggregate columns optionally filtered by the provided predicate .
&self
predicate
Predicate
group_columns
&Selection<'_>
aggregates
&[(ColumnName<'_>, AggregateType)]
&self
predicate
Predicate
group_columns
&Selection<'_>
aggregates
&[(ColumnName<'_>, AggregateType)]