Struct ColumnarScan 

pub struct ColumnarScan {
    pub table_id: u32,
    pub projected_columns: Vec<usize>,
    pub pushed_filter: Option<PushdownFilter>,
    pub residual_filter: Option<TypedExpr>,
}

ColumnarScan オペレータ。

Fields

table_id: u32

projected_columns: Vec<usize>

pushed_filter: Option<PushdownFilter>

residual_filter: Option<TypedExpr>

Implementations

impl ColumnarScan

pub fn new( table_id: u32, projected_columns: Vec<usize>, pushed_filter: Option<PushdownFilter>, residual_filter: Option<TypedExpr>, ) -> Self

pub fn should_skip_row_group(&self, stats: &RowGroupStatistics) -> bool

RowGroup をプルーニングするか判定する。

pub fn evaluate_pushdown( filter: &PushdownFilter, stats: &RowGroupStatistics, ) -> bool

プッシュダウンフィルタを統計情報で評価する。

Trait Implementations

impl Clone for ColumnarScan

fn clone(&self) -> ColumnarScan

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnarScan

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

Formats the value using the given formatter.