Struct RowBudget 

pub(crate) struct RowBudget {
    offset: Option<usize>,
    limit: Option<usize>,
}

Running offset/limit budget shared across row groups.

Fields

offset: Option<usize>

limit: Option<usize>

Implementations

impl RowBudget

pub(crate) fn new(offset: Option<usize>, limit: Option<usize>) -> Self

pub(crate) fn is_exhausted(self) -> bool

pub(crate) fn rows_after(self, rows_before_budget: usize) -> usize

Returns how many selected rows remain after applying this budget.

fn selected_row_limit(self) -> Option<usize>

Returns the number of selected rows needed before applying the offset.

fn apply_to_plan( self, plan_builder: ReadPlanBuilder, row_count: usize, ) -> BudgetedReadPlan

pub(crate) fn advance( self, rows_before_budget: usize, rows_after_budget: usize, ) -> Self

Advance the budget past one row group.

rows_before_budget is the number of rows selected before applying the budget, and rows_after_budget is the number retained for output from this row group.

Trait Implementations

impl Clone for RowBudget

fn clone(&self) -> RowBudget

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RowBudget

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

Formats the value using the given formatter.

impl PartialEq for RowBudget

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

Tests for self and other values to be equal, and is used by ==.

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

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

impl Copy for RowBudget

impl Eq for RowBudget

impl StructuralPartialEq for RowBudget