Struct tc_table::Merged

pub struct Merged<F, D, Txn> { /* private fields */ }

A merge of multiple table indexes

Implementations

impl<F, D, Txn> Merged<F, D, Txn>where
    F: File<Key = NodeId, Block = Node>,
    D: Dir,
    Txn: Transaction<D>,

pub fn new(
    left: MergeSource<F, D, Txn>,
    right: IndexSlice<F, D, Txn>
) -> TCResult<Self>

Create a new merge of the given IndexSlice with the given MergeSource.

pub async fn slice_rows<'a>(
    self,
    txn_id: TxnId,
    bounds: Bounds,
    reverse: bool
) -> TCResult<TCBoxTryStream<'a, Vec<Value>>>

Stream the rows within the given Bounds of this merge

Trait Implementations

impl<F: Clone, D: Clone, Txn: Clone> Clone for Merged<F, D, Txn>

fn clone(&self) -> Merged<F, D, Txn>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<F, D, Txn> From<Merged<F, D, Txn>> for Table<F, D, Txn>

fn from(merged: Merged<F, D, Txn>) -> Self

Converts to this type from the input type.

impl<F, D, Txn> Instance for Merged<F, D, Txn>where
    Self: Send + Sync,

type Class = TableType

The Class type of this instance

fn class(&self) -> Self::Class

Returns the [Class] of this instance.

impl<F, D, Txn> TableInstance for Merged<F, D, Txn>where
    F: File<Key = NodeId, Block = Node>,
    D: Dir,
    Txn: Transaction<D>,

fn key(&self) -> &[Column]

Return the schema of this Table’s key.

fn values(&self) -> &[Column]

Return the schema of this Table’s values.

fn schema(&self) -> TableSchema

Return the schema of this Table.

impl<F, D, Txn> TableOrder for Merged<F, D, Txn>where
    F: File<Key = NodeId, Block = Node>,
    D: Dir,
    Txn: Transaction<D>,

type OrderBy = Merged<F, D, Txn>

The type of Table returned by this instance’s order_by method.

type Reverse = Merged<F, D, Txn>

The type of Table returned by this instance’s reversed method.

fn order_by(self, columns: Vec<Id>, reverse: bool) -> TCResult<Self::OrderBy>

Return an ordered view of this table.

fn reverse(self) -> TCResult<Self::Reverse>

Reverse the order returned by rows.

fn validate_order(&self, order: &[Id]) -> TCResult<()>

Return an error if this table does not support ordering by the given columns.

impl<F, D, Txn> TableSlice for Merged<F, D, Txn>where
    F: File<Key = NodeId, Block = Node>,
    D: Dir,
    Txn: Transaction<D>,

type Slice = Merged<F, D, Txn>

The type of Table returned by this instance’s slice method.

fn slice(self, bounds: Bounds) -> TCResult<Self::Slice>

Limit the returned rows to the given Bounds.

fn validate_bounds(&self, bounds: &Bounds) -> TCResult<()>

Return an error if this table does not support the given Bounds.

impl<F, D, Txn> TableStream for Merged<F, D, Txn>where
    F: File<Key = NodeId, Block = Node>,
    D: Dir,
    Txn: Transaction<D>,

type Limit = Limited<F, D, Txn>

type Selection = Selection<F, D, Txn, Merged<F, D, Txn>>

fn limit(self, limit: u64) -> Self::Limit

Limit the number of rows returned by rows.

fn select(self, columns: Vec<Id>) -> TCResult<Self::Selection>

Limit the columns returned by rows.

fn rows<'a, 'async_trait>(
    self,
    txn_id: TxnId
) -> Pin<Box<dyn Future<Output = TCResult<TCBoxTryStream<'a, Vec<Value>>>> + Send + 'async_trait>>where
    Self: 'async_trait,
    'a: 'async_trait,

Return a stream of the rows in this Table.

fn count<'async_trait>(
    self,
    txn_id: TxnId
) -> Pin<Box<dyn Future<Output = TCResult<u64>> + Send + 'async_trait>>where
    Self: Send + 'async_trait,

Return the number of rows in this Table.