Struct WrappedTable 

pub struct WrappedTable { /* private fields */ }

A WrappedTable takes a Table and extends it with a number of helpful, object-safe methods for accessing a table.

It essentially acts like an extension trait: it is a separate type to allow object-safe extension methods to call methods that require Self: Sized. The implementations here downcast manually to the type used when constructing the WrappedTable.

Implementations

impl WrappedTable

pub fn dyn_clone(&self) -> Self

Clone the contents of the table.

pub fn scan_bounded( &self, subset: SubsetRef<'_>, start: Offset, n: usize, out: &mut TaggedRowBuffer, ) -> Option<Offset>

Starting at the given Offset into subset, scan up to n rows and write them to out. Return the next starting offset. If no offset is returned then the subset has been scanned completely.

pub fn scan_project( &self, subset: SubsetRef<'_>, cols: &[ColumnId], start: Offset, n: usize, cs: &[Constraint], out: &mut TaggedRowBuffer, ) -> Option<Offset>

A variant fo WrappedTable::scan_bounded that projects a subset of columns and only appends rows that match the given constraints.

pub fn scan(&self, subset: SubsetRef<'_>) -> TaggedRowBuffer

Return the contents of the subset as a TaggedRowBuffer.

Trait Implementations

impl Deref for WrappedTable

type Target = dyn Table

The resulting type after dereferencing.

fn deref(&self) -> &Self::Target

Dereferences the value.

impl DerefMut for WrappedTable

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.