Enum ColumnLocator

pub enum ColumnLocator {
    Table(String),
    Expression(String),
    NewExpression,
}

Locates a view column. Table columns are those defined on the table, but their types will reflect the view type, not the table type.

Variants

Table(String)

Expression(String)

NewExpression

Implementations

impl ColumnLocator

pub fn name(&self) -> Option<&String>

Pulls the column’s name from the locator. If the column is a new expression which has yet to be saved, the function will return None.

pub fn name_or_default(&self, session: &Session) -> String

pub fn is_active(&self, session: &Session) -> bool

pub fn is_saved_expr(&self) -> bool

pub fn is_expr(&self) -> bool

pub fn is_new_expr(&self) -> bool

pub fn view_type(&self, session: &Session) -> Option<ColumnType>

Trait Implementations

impl Clone for ColumnLocator

fn clone(&self) -> ColumnLocator

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for ColumnLocator

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

Formats the value using the given formatter.

impl PartialEq for ColumnLocator

fn eq(&self, other: &ColumnLocator) -> 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 StructuralPartialEq for ColumnLocator