Struct JoinChain 

pub struct JoinChain { /* private fields */ }

A join under construction.

From https://www.sqlite.org/syntax/join-clause.html, the join-constraint — ON expr or USING (cols) — is a production of its own, applied after whichever join-operator was used. So cross_join takes on and using too, which is the point of a CROSS JOIN in SQLite: it is an inner join that additionally forbids the planner from reordering the two tables. PostgreSQL’s CROSS JOIN admits no condition at all and correspondingly has a narrower chain type; SQLite needs no such split.

NATURAL excludes both; nothing enforces that here, because the caller picks one method and the grammar is what says so.

Implementations

impl JoinChain

pub fn as_(self, alias: impl Into<Cow<'static, str>>) -> JoinChain

AS "alias" on the joined table.

pub fn indexed_by(self, name: impl Into<Cow<'static, str>>) -> JoinChain

INDEXED BY "name" on the joined table.

pub fn not_indexed(self) -> JoinChain

NOT INDEXED on the joined table.

pub fn natural(self) -> JoinChain

NATURAL <kind> JOIN — derive the join columns from the two items’ names.

pub fn on(self, condition: impl IntoExpr) -> JoinChain

ON condition. Several conditions are AND-joined.

pub fn on_eq(self, a: impl IntoExpr, b: impl IntoExpr) -> JoinChain

ON (a = b), the overwhelmingly common shape.

pub fn using( self, columns: impl IntoIterator<Item = impl Into<Cow<'static, str>>>, ) -> JoinChain

USING ("a", "b") — join on equally named columns, merging them.

Trait Implementations

impl Clone for JoinChain

fn clone(&self) -> JoinChain

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JoinChain

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

Formats the value using the given formatter.

impl From<JoinChain> for Join

fn from(chain: JoinChain) -> Join

Converts to this type from the input type.

impl<Q: HasJoins> Mod<Q> for JoinChain

fn apply(self, q: &mut Q)

Apply this modification to q.