Enum ExtensionColumn 

pub enum ExtensionColumn {
    Named {
        name: String,
        type: Type,
    },
    Expr(Expr),
}

Represents an output column specification.

These values mirror the text-format output column forms. Named columns keep the parsed Substrait type protobuf so handlers can convert directly to relation schemas.

Variants

Named

Named column with a parsed Substrait type (e.g. name:i64?).

Fields

name: String

Column name as it appears in the extension relation output.

type: Type

Parsed Substrait type for the column.

This uses the protobuf field name, hence the raw identifier.

Expr(Expr)

Expression-compatible output column, including field references.

Trait Implementations

impl Clone for ExtensionColumn

fn clone(&self) -> ExtensionColumn

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExtensionColumn

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

Formats the value using the given formatter.

impl ScopedParsePair for ExtensionColumn

fn rule() -> Rule

fn message() -> &'static str

fn parse_pair( extensions: &SimpleExtensions, pair: Pair<'_, Rule>, ) -> Result<Self, MessageParseError>

impl Textify for ExtensionColumn

fn name() -> &'static str

fn textify<S: Scope, W: Write>(&self, ctx: &S, w: &mut W) -> Result