Struct Members 

pub struct Members { /* private fields */ }

The list of an IN, in the shape a loop can look a row up in.

Built once when the pipeline is built, because the list is literals the user wrote and cannot change from chunk to chunk. This is the same idea as crate::prepare and is a separate type only because an IN is not a function call by the time it reaches here.

Implementations

impl Members

pub fn of(values: &[Value], negated: bool) -> Option<Self>

The list as a set, or None for a list this file will not fold.

None covers a list of fewer than two entries, which is not worth a set, a list holding a kind of value that does not hash the way SQL compares, and a list mixing two kinds, which the binder does not produce but which is cheaper to refuse than to reason about.

pub fn len(&self) -> usize

How many distinct values the list holds, for a caller that wants to say so.

pub fn is_empty(&self) -> bool

Whether the list holds no value at all, which Members::of never builds.

Trait Implementations

impl Debug for Members

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

Formats the value using the given formatter.