Enum ProjectedAggregate 

pub enum ProjectedAggregate {
    Count,
    CountPresent {
        field: String,
    },
    CountDistinct {
        field: String,
    },
    CountDistinctPresent {
        field: String,
    },
    Sum {
        field: String,
    },
    Mean {
        field: String,
    },
    Min {
        field: String,
    },
    Max {
        field: String,
    },
    Any {
        field: String,
    },
    All {
        field: String,
    },
}

One aggregate function over a projected column.

Typed rather than (op, field): Count reads no column, so a count that names one is unrepresentable instead of rejected at the server.

Variants

Count

Number of matching rows.

CountPresent

Number of matching rows where the named optional column is non-null.

Fields

field: String

Field name to count when present.

CountDistinct

Number of distinct values of the named column (NULL counts as one value).

Fields

field: String

Field name to count distinct values over.

CountDistinctPresent

Number of distinct non-null values of the named optional column.

Fields

field: String

Field name to count distinct non-null values over.

Sum

Exact integer/fixed-point sum of one column (I64, U64, uniform-scale Decimal, or uniform-currency Money).

Fields

field: String

Field name to sum.

Mean

Exact integer/fixed-point mean ((total, count)) of one column (I64, U64, uniform-scale Decimal, or uniform-currency Money).

Fields

field: String

Field name to average.

Min

Smallest value of one column.

Fields

field: String

Field name to minimize.

Max

Largest value of one column.

Fields

field: String

Field name to maximize.

Any

Logical OR over a boolean column (false on empty input).

Fields

field: String

Boolean field name.

All

Logical AND over a boolean column (true on empty input).

Fields

field: String

Boolean field name.

Trait Implementations

impl Clone for ProjectedAggregate

fn clone(&self) -> ProjectedAggregate

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ProjectedAggregate

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for ProjectedAggregate

impl PartialEq for ProjectedAggregate

fn eq(&self, other: &ProjectedAggregate) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ProjectedAggregate