Enum ExtensionColumn 

pub enum ExtensionColumn {
    Named {
        name: String,
        type_spec: String,
    },
    Reference(i32),
    Expression(RawExpression),
}

Represents an output column specification

Variants

Named

Named column with type (name:type)

Fields

name: String

type_spec: String

Reference(i32)

Field reference ($0, $1, etc.)

Expression(RawExpression)

Expression column — not yet fully supported, hence the private interface.

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 ParsePair for ExtensionColumn

fn rule() -> Rule

fn message() -> &'static str

fn parse_pair(pair: Pair<'_, Rule>) -> Self

fn parse_str(s: &str) -> Result<Self, MessageParseError>

impl Textify for ExtensionColumn

fn name() -> &'static str

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