Enum RowCount 

pub enum RowCount {
    Exact(u64),
    Estimated(u64),
    Partial(u64),
    Unavailable,
}

Row count evidence for a report field.

Variants

Exact(u64)

An exact row count for the reported scope.

Estimated(u64)

A row count estimate from metadata, planning, or another non-exact source.

Partial(u64)

A partial observed count. This is not proof of the final total.

Unavailable

No row count is available.

Implementations

impl RowCount

pub fn to_json_value(self) -> Value

Returns a JSON-compatible shape that preserves count kind and value.

impl RowCount

pub const fn exact(value: u64) -> Self

Creates an exact row count.

pub const fn exact_from_usize(value: usize) -> Self

Creates an exact row count from a platform-sized value, saturating at u64::MAX.

pub const fn exact_from_u128(value: u128) -> Self

Creates an exact row count from a wide value, saturating at u64::MAX.

pub const fn estimated(value: u64) -> Self

Creates an estimated row count.

pub const fn estimated_from_usize(value: usize) -> Self

Creates an estimated row count from a platform-sized value, saturating at u64::MAX.

pub const fn estimated_from_u128(value: u128) -> Self

Creates an estimated row count from a wide value, saturating at u64::MAX.

pub const fn partial(value: u64) -> Self

Creates a partial observed row count.

pub const fn partial_from_usize(value: usize) -> Self

Creates a partial observed row count from a platform-sized value, saturating at u64::MAX.

pub const fn partial_from_u128(value: u128) -> Self

Creates a partial observed row count from a wide value, saturating at u64::MAX.

pub const fn unavailable() -> Self

Creates an unavailable row count.

pub const fn kind(&self) -> RowCountKind

Returns the count classification.

pub const fn value(&self) -> Option<u64>

Returns the numeric count when the report carries one.

pub const fn exact_value(&self) -> Option<u64>

Returns the exact count, if this value proves one.

pub const fn estimated_value(&self) -> Option<u64>

Returns the estimated count, if this value carries an estimate.

pub const fn partial_value(&self) -> Option<u64>

Returns the partial count, if this value carries a partial observation.

pub const fn is_exact(&self) -> bool

Returns whether the count is exact.

pub const fn is_estimated(&self) -> bool

Returns whether the count is estimated.

pub const fn is_partial(&self) -> bool

Returns whether the count is partial.

pub const fn is_unavailable(&self) -> bool

Returns whether no row count is available.

Trait Implementations

impl Clone for RowCount

fn clone(&self) -> RowCount

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for RowCount

impl Debug for RowCount

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

Formats the value using the given formatter.

impl Display for RowCount

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

Formats the value using the given formatter.

impl Eq for RowCount

impl PartialEq for RowCount

fn eq(&self, other: &RowCount) -> 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 RowCount