Struct datafusion::prelude::Column
source · [−]Expand description
A named reference to a qualified field in a schema.
Fields
relation: Option<String>
relation/table name.
name: String
field/column name.
Implementations
sourceimpl Column
impl Column
sourcepub fn from_qualified_name(flat_name: &str) -> Column
pub fn from_qualified_name(flat_name: &str) -> Column
Deserialize a fully qualified name string into a column
pub fn normalize_with_schemas(
self,
schemas: &[&Arc<DFSchema>],
using_columns: &[HashSet<Column, RandomState>]
) -> Result<Column, DataFusionError>
Trait Implementations
sourceimpl Ord for Column
impl Ord for Column
sourceimpl PartialOrd<Column> for Column
impl PartialOrd<Column> for Column
sourcefn partial_cmp(&self, other: &Column) -> Option<Ordering>
fn partial_cmp(&self, other: &Column) -> Option<Ordering>
This method returns an ordering between self
and other
values if one exists. Read more
1.0.0 · sourcefn lt(&self, other: &Rhs) -> bool
fn lt(&self, other: &Rhs) -> bool
This method tests less than (for self
and other
) and is used by the <
operator. Read more
1.0.0 · sourcefn le(&self, other: &Rhs) -> bool
fn le(&self, other: &Rhs) -> bool
This method tests less than or equal to (for self
and other
) and is used by the <=
operator. Read more
impl Eq for Column
impl StructuralEq for Column
impl StructuralPartialEq for Column
Auto Trait Implementations
impl RefUnwindSafe for Column
impl Send for Column
impl Sync for Column
impl Unpin for Column
impl UnwindSafe for Column
Blanket Implementations
sourceimpl<T> BorrowMut<T> for T where
T: ?Sized,
impl<T> BorrowMut<T> for T where
T: ?Sized,
const: unstable · sourcefn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
sourceimpl<T> CallHasher for T where
T: Hash + ?Sized,
impl<T> CallHasher for T where
T: Hash + ?Sized,
sourceimpl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
impl<Q, K> Equivalent<K> for Q where
Q: Eq + ?Sized,
K: Borrow<Q> + ?Sized,
sourcefn equivalent(&self, key: &K) -> bool
fn equivalent(&self, key: &K) -> bool
Compare self to key
and return true
if they are equal.