Struct ColumnRef 

pub struct ColumnRef { /* private fields */ }

Column identity in the native expression IR.

name is the physical/logical field name used to resolve the column against an input schema. qualifier disambiguates which input namespace owns that field when a node has more than one input. display_name is deliberately separate: it is the externally visible or projected name used for output contracts and selected diagnostics, and it may differ from name when the same source column is projected under a distinct alias. Display formatting uses the qualifier and lookup name.

Implementations

impl ColumnRef

pub fn unqualified(name: impl Into<String>) -> Self

Build a column reference with no namespace qualifier.

Unqualified references resolve against the current single-input schema. The display name is initialized to the same value as the lookup name.

pub fn input( input: usize, name: impl Into<String>, display_name: impl Into<String>, ) -> Self

Build a column reference scoped to an input ordinal.

This is the preferred qualifier for binary-input nodes such as joins. input is zero-based and identifies the node input. It does not index fields. Equality and hashing include the qualifier and both names, so a join key spelled with a different display_name is a different key.

pub fn qualifier(&self) -> Option<&ColumnQualifier>

Input identity, or None when the column is unqualified.

pub fn name(&self) -> &str

Column name used for input-schema resolution.

pub fn display_name(&self) -> &str

Frontend spelling retained for diagnostics and expression identity.

pub fn is_qualified(&self) -> bool

Whether this reference names an explicit input ordinal.

Trait Implementations

impl Clone for ColumnRef

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ColumnRef

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

Formats the value using the given formatter.

impl Display for ColumnRef

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

Formats the value using the given formatter.

impl Eq for ColumnRef

impl Hash for ColumnRef

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for ColumnRef

fn cmp(&self, other: &Self) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

fn clamp_to<R>(self, range: R) -> Self

where Self: Sized, R: ClampBounds<Self>,

🔬This is a nightly-only experimental API. (clamp_to)

Restrict a value to a certain range.

impl PartialEq for ColumnRef

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl PartialOrd for ColumnRef

fn partial_cmp(&self, other: &Self) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl StructuralPartialEq for ColumnRef