Struct RowCounter 

pub struct RowCounter { /* private fields */ }

Tracker counting physical and deleted rows.

Implementations

impl RowCounter

pub const MAX: Self

usize::MAX physical rows, 0 deleted rows

pub fn new<P, D>(physical_rows: P, deleted_rows: D) -> Self

where usize: TryFrom<P> + TryFrom<D>, <usize as TryFrom<P>>::Error: Debug, <usize as TryFrom<D>>::Error: Debug,

Panics

Panics if deleted_rows > physical_rows, or if usize conversion fails.

pub unsafe fn set_deleted_rows<D>(&mut self, deleted_rows: D)

where usize: TryFrom<D>, <usize as TryFrom<D>>::Error: Debug,

Safety

The caller is responsible for ensuring the value is correct.

Panics

Panics if self.physical_rows < self.deleted_rows

pub fn add(self, other: Self) -> Self

Performs a saturating add if there are no deleted rows, otherwise performs a checked add.

Panics

Panics if there are deleted rows and addition overflows.

pub fn sub(self, other: Self) -> Self

Panics

Panics if subtraction overflows.

pub fn num_rows(&self) -> PolarsResult<usize>

Returns the number of rows after applying deletions. This returns an error if there are more deleted rows than physical rows.

pub fn num_rows_idxsize(&self) -> PolarsResult<IdxSize>

Returns RowCounter::num_rows as a usize.

pub fn num_rows_idxsize_saturating(&self) -> PolarsResult<IdxSize>

Saturates to IdxSize::MAX if conversion fails

pub fn num_physical_rows(&self) -> usize

Returns the number of rows physically present in the file.

pub fn num_physical_rows_idxsize_saturating(&self) -> IdxSize

Trait Implementations

impl Clone for RowCounter

fn clone(&self) -> RowCounter

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RowCounter

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

Formats the value using the given formatter.

impl Default for RowCounter

fn default() -> RowCounter

Returns the “default value” for a type.

impl PartialEq for RowCounter

fn eq(&self, other: &RowCounter) -> 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 RowCounter

impl StructuralPartialEq for RowCounter