Struct TextProjectionExpr 

pub struct TextProjectionExpr { /* private fields */ }

TextProjectionExpr

Shared bounded text-function projection over one source field. This stays intentionally narrow even though it now lowers through the same canonical Expr surface used by SQL projection planning.

Implementations

impl TextProjectionExpr

pub const fn field(&self) -> &str

Borrow the source field name.

pub fn sql_label(&self) -> String

Render the stable SQL-style output label for this projection.

pub fn apply_value(&self, value: Value) -> Result<Value, QueryError>

Apply this projection to one already-loaded scalar field value.

Trait Implementations

impl Clone for TextProjectionExpr

fn clone(&self) -> TextProjectionExpr

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for TextProjectionExpr

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

Formats the value using the given formatter.

impl PartialEq for TextProjectionExpr

fn eq(&self, other: &TextProjectionExpr) -> 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 Eq for TextProjectionExpr

impl StructuralPartialEq for TextProjectionExpr