Struct LinearEstimator 

pub struct LinearEstimator { /* private fields */ }

Fits y = slope * x + intercept across all values, stores residuals bitpacked.

Header: codec_id(1) + intercept(8) + slope_num(8) + slope_den(8) + bpv(1) + offset(8) = 34

Estimation uses O(1) memory by tracking value extremes during collection and computing worst-case residual bounds in finalize().

Limitation: the per-column offset is stored as i64 (8 bytes). When values span nearly the full u64 range (e.g. FAST_FIELD_MISSING mixed with small values), residuals can exceed i64 bounds. The estimator returns None in that case so the auto-selector falls back to bitpacked.

Trait Implementations

impl CodecEstimator for LinearEstimator

fn collect(&mut self, value: u64)

fn finalize(&mut self)

fn estimate(&self) -> Option<u64>

fn serialize(&self, values: &[u64], writer: &mut dyn Write) -> Result<u64>

impl Default for LinearEstimator

fn default() -> LinearEstimator

Returns the “default value” for a type.