Struct TableStats 

pub struct TableStats {
    pub row_count: usize,
    pub avg_row_size: usize,
    pub total_size: usize,
    pub ndv: usize,
    pub last_updated: SystemTime,
}

Table-level statistics

Fields

row_count: usize

Total number of rows

avg_row_size: usize

Average row size in bytes

total_size: usize

Total table size in bytes

ndv: usize

Number of distinct values (for single-column tables)

last_updated: SystemTime

Last update timestamp

Implementations

impl TableStats

pub fn new(row_count: usize, avg_row_size: usize) -> Self

Create new table statistics

pub fn update_row_count(&mut self, row_count: usize)

Update row count

pub fn estimate_scan_cost(&self) -> f64

Estimate scan cost (relative units)

Trait Implementations

impl Clone for TableStats

fn clone(&self) -> TableStats

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TableStats

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

Formats the value using the given formatter.