Struct TableStats 

pub struct TableStats {
    pub row_count: u64,
    pub avg_row_size_bytes: u64,
    pub index_on: Vec<String>,
    pub column_stats: HashMap<String, ColumnStats>,
}

Per-table statistics used to calibrate cost estimates.

Fields

row_count: u64

Approximate number of rows in the table.

avg_row_size_bytes: u64

Average row size in bytes (used to estimate page reads).

index_on: Vec<String>

Column names that have an index.

column_stats: HashMap<String, ColumnStats>

Per-column statistics keyed by column name (lower-cased).

Implementations

impl TableStats

pub fn with_column(self, name: impl Into<String>, stats: ColumnStats) -> Self

Attach per-column statistics to this table description.

Returns self so that builder calls can be chained.

Trait Implementations

impl Clone for TableStats

fn clone(&self) -> Self

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.

impl Default for TableStats

fn default() -> Self

Returns the “default value” for a type.