struct SpecialUnary {
map_fn: for<'a, 'b> fn(_: &'b ColumnSpecs<'a>, _: ResultSpec<'a>) -> ResultSpec<'a>,
pushdownable: bool,
}Expand description
A unary function we’ve added special-case handling for; including:
- A three-argument function, taking and returning ResultSpecs. This overrides the default function-handling logic entirely.
- Metadata on whether / not this function is pushdownable. See Trace.
Fields§
§map_fn: for<'a, 'b> fn(_: &'b ColumnSpecs<'a>, _: ResultSpec<'a>) -> ResultSpec<'a>§pushdownable: boolImplementations§
Source§impl SpecialUnary
impl SpecialUnary
Sourcefn for_func(func: &UnaryFunc) -> Option<SpecialUnary>
fn for_func(func: &UnaryFunc) -> Option<SpecialUnary>
Returns the special-case handling for a particular function, if it exists.
Auto Trait Implementations§
impl Freeze for SpecialUnary
impl RefUnwindSafe for SpecialUnary
impl Send for SpecialUnary
impl Sync for SpecialUnary
impl Unpin for SpecialUnary
impl UnwindSafe for SpecialUnary
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