Function datafusion::optimizer::utils::only_or_err

pub fn only_or_err<T>(slice: &[T]) -> Result<&T, DataFusionError>

👎Deprecated since 34.0.0: use datafusion_expr::utils::only_or_err instead

Returns the first (and only) element in a slice, or an error

Arguments

• slice - The slice to extract from

Return value

The first element, or an error