Enum FieldOverride 

pub enum FieldOverride {
    Inherit,
    Clear,
    Set(String),
}

Tri-state for a single overridable field. Inherit means the WITHIN clause didn’t mention this field and the runtime should fall through to its prior source (session-level or auth-installed). Clear means the clause explicitly set the field to NULL — this must hide the inherited value, not fall through. Set(v) carries the literal value.

Variants

Inherit

Clear

Set(String)

Implementations

impl FieldOverride

pub fn is_active(&self) -> bool

Is this override active — i.e. it should win over any inherited value?

pub fn resolve(&self, inherited: Option<String>) -> Option<String>

Resolve the override against an inherited value. Inherit passes the inherited through; Clear returns None; Set returns its literal.

Trait Implementations

impl Clone for FieldOverride

fn clone(&self) -> FieldOverride

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FieldOverride

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

Formats the value using the given formatter.

impl Default for FieldOverride

fn default() -> FieldOverride

Returns the “default value” for a type.

impl PartialEq for FieldOverride

fn eq(&self, other: &FieldOverride) -> 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 FieldOverride

impl StructuralPartialEq for FieldOverride