Enum RawIndexAlgorithm 

#[non_exhaustive]
pub enum RawIndexAlgorithm {
    BTree {
        columns: ColList,
    },
    Hash {
        columns: ColList,
    },
    Direct {
        column: ColId,
    },
}

Data specifying an index algorithm. New fields MUST be added to the END of this enum, to maintain ABI compatibility.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

BTree

Implemented using a B-Tree.

Currently, this uses a rust std::collections::BTreeMap.

Fields

columns: ColList

The columns to index on. These are ordered.

Hash

Currently forbidden.

Fields

columns: ColList

The columns to index on. These are ordered.

Direct

Implemented using direct indexing in list(s) of RowPointers. The column this is placed on must also have a unique constraint.

Fields

column: ColId

The column to index on. Only one is allowed, as direct indexing with more is nonsensical.

Trait Implementations

impl Clone for RawIndexAlgorithm

fn clone(&self) -> RawIndexAlgorithm

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for RawIndexAlgorithm

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for RawIndexAlgorithm

fn deserialize<D: Deserializer<'de>>(deserializer: D) -> Result<Self, D::Error>

Deserialize this value from the given deserializer.

impl Serialize for RawIndexAlgorithm

fn serialize<S: Serializer>(&self, __serializer: S) -> Result<S::Ok, S::Error>

Serialize self in the data format of S using the provided serializer.

impl SpacetimeType for RawIndexAlgorithm

fn make_type<S: TypespaceBuilder>(__typespace: &mut S) -> AlgebraicType

Returns an AlgebraicType representing the type for Self in SATS and in the typing context in typespace. This is used by the automatic type registration system in Rust modules.