Enum ColumnTarget 

pub enum ColumnTarget {
    Relation(ColumnWrite),
    QueryOutput {
        name: Option<Ident>,
        position: usize,
    },
}

The target endpoint of a ColumnLineageEdge — a column in a named relation (Relation) or a transient SELECT output (QueryOutput).

Variants

Relation(ColumnWrite)

A column in a real relation receiving the inbound lineage edge — INSERT / UPDATE / MERGE target columns, or columns of the new relation produced by CTAS / CREATE VIEW / ALTER VIEW. Carries the column’s catalog ResolutionKind (via ColumnWrite), the write-side counterpart of ColumnLineageEdge::source’s ColumnRead.

QueryOutput

A transient column produced by a top-level SELECT projection that is not piped into a named relation. name follows the projection’s explicit alias or inferred single-column name (None for expressions without a clear name); position is always set so anonymous outputs remain identifiable.

Fields

name: Option<Ident>

position: usize

Trait Implementations

impl Clone for ColumnTarget

fn clone(&self) -> ColumnTarget

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnTarget

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

Formats the value using the given formatter.

impl Eq for ColumnTarget

impl Hash for ColumnTarget

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 PartialEq for ColumnTarget

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for ColumnTarget