Struct mz_persist_types::dyn_struct::ColumnsRef

pub struct ColumnsRef<V = ()> {
    validity: V,
    pub(crate) cols: BTreeMap<Arc<str>, DynColumnRef>,
}

A set of shared references to named columns.

This type implements a “builder”-esque pattern to help crate::columnar::Schema::decoder impls. All columns should be removed via Self::col and the Self::finish called to verify that all columns have been accounted for.

Fields

validity: V

cols: BTreeMap<Arc<str>, DynColumnRef>

Implementations

impl<V> ColumnsRef<V>

pub fn col<T: Data>(&mut self, name: &str) -> Result<Arc<T::Col>, String>

Removes the named typed column from the set.

fn dyn_col(&mut self, name: &str) -> Result<DynColumnRef, String>

Removes the named dynamic column from the set.

pub fn finish(self) -> Result<V, String>

Verifies that all columns in the set have been removed.

Trait Implementations

impl<V: Debug> Debug for ColumnsRef<V>

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

Formats the value using the given formatter.