Enum IndexOrigin 

pub enum IndexOrigin {
    Created,
    Unique,
    PrimaryKey,
    Module,
}

Where an index came from, which decides whether it can be dropped and how it is named in sqlite_schema.

Variants

Created

CREATE INDEX.

Unique

A UNIQUE constraint.

PrimaryKey

A PRIMARY KEY constraint on a rowid table.

Module

An index a module owns, named by CREATE INDEX ... USING <module>.

Not a b-tree, and the planner has to know that. Its rows live in a virtual table, its root is that table’s own root, and none of the b-tree paths apply to it - there is nothing to seek and nothing to range-scan. What it can do is answer “the k nearest to this vector”, which is a whole access path of its own.

Trait Implementations

impl Clone for IndexOrigin

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for IndexOrigin

impl Debug for IndexOrigin

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

Formats the value using the given formatter.

impl Eq for IndexOrigin

impl PartialEq for IndexOrigin

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for IndexOrigin