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RankedEntryValue

drive::query::drive_document_ranked_query

Enum RankedEntryValue 

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pub enum RankedEntryValue {
    Count(u64),
    Sum(i64),
    AvgFixedPoint(i128),
}
Expand description

The aggregate value carried by one ranked entry. Mirrors grovedb’s [grovedb::operations::proof::indexed_axis::AxisEntries] variants exactly, one scalar at a time, so a Vec<RankedEntry> and an AxisEntries carry the same information with the same types.

The variant is redundant with the request’s RankedAxis by construction; carrying it per entry means a decoded response is self-describing (no need to thread the request alongside it to know how to interpret the number), and lets both the executor and the verifier fail loudly if grovedb ever hands back an axis’s entries under a different axis’s request.

Variants§

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Count(u64)

Document count in the group (RankedAxis::Count).

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Sum(i64)

Running sum over the group (RankedAxis::Sum).

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AvgFixedPoint(i128)

Fixed-point average over the group (RankedAxis::Avg); divide by RANKED_AVG_SCALE for the real value, or use Self::as_f64.

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impl RankedEntryValue

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pub fn axis(self) -> RankedAxis

The axis this value came from.

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pub fn as_f64(self) -> f64

The value as an f64, with the Avg variant scaled down by RANKED_AVG_SCALE.

Lossy for large counts / sums (beyond 2^53) and for averages — this is a display helper. Consensus-relevant comparisons must use the exact integer variants; two groups whose fixed-point averages differ can round to the same f64.

Trait Implementations§

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impl Clone for RankedEntryValue

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fn clone(&self) -> RankedEntryValue

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

Performs copy-assignment from source. Read more
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impl Copy for RankedEntryValue

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impl Debug for RankedEntryValue

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

Formats the value using the given formatter. Read more
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impl Eq for RankedEntryValue

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impl PartialEq for RankedEntryValue

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

Tests for self and other values to be equal, and is used by ==.
1.0.0 (const: unstable) · Source§

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

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

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