Struct ViewColumn 

pub struct ViewColumn {
    pub name: Identifier,
    pub column_type: ColumnType,
    pub comment: Option<String>,
}

A single named column in a view or materialized view.

Postgres allows column alias lists on CREATE VIEW to override the column names derived from the SELECT list. This struct records the (possibly overridden) column name, its resolved type, and any attached comment.

column_type sentinel

When ViewColumn is constructed from an explicit alias list in T3 (parsing), the type is not yet known — it requires resolving the SELECT body against the catalog. In that case column_type is set to ColumnType::Other { raw: "unresolved".to_string() }, which serves as a parser-internal sentinel. T4’s AST canonicalization pass replaces it with the resolved type. The sentinel must never appear in a serialized catalog or plan — T4 always runs before serialization.

When ViewColumn is built from the live catalog (T5), column_type is parsed directly from format_type(a.atttypid, a.atttypmod).

Fields

name: Identifier

Column name as it appears in the view definition (or is aliased).

column_type: ColumnType

Resolved data type of the column.

Set to ColumnType::Other { raw: "unresolved".to_string() } as a parser-internal sentinel when type resolution has not yet occurred (T3 → T4 transition). Must be fully resolved before serialization.

comment: Option<String>

Optional COMMENT ON COLUMN text.

Trait Implementations

impl Clone for ViewColumn

fn clone(&self) -> ViewColumn

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ViewColumn

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ViewColumn

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Hash for ViewColumn

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 ViewColumn

fn eq(&self, other: &ViewColumn) -> 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 Serialize for ViewColumn

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for ViewColumn

impl StructuralPartialEq for ViewColumn