Struct NA 

pub struct NA;

Trait Implementations

impl Debug for NA

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

Formats the value using the given formatter.

impl Default for NA

fn default() -> NA

Returns the “default value” for a type.

impl Expression for NA

fn write_query( &self, _writer: &dyn SqlWriter, _context: &mut Context, _out: &mut DynQuery, )

Render the expression into SQL.

fn accept_visitor( &self, _matcher: &mut dyn ExpressionVisitor, _writer: &dyn SqlWriter, _context: &mut Context, _out: &mut DynQuery, ) -> bool

Match the expression.

fn as_identifier(&self, context: &mut Context) -> String

Convert expression to an identifier string.

impl ExpressionCollection for NA

fn expr_iter(&self) -> impl Iterator<Item = impl Expression> + Clone

impl OpPrecedence for NA

fn precedence(&self, _writer: &dyn SqlWriter) -> i32

Lower numbers bind weaker, writers parenthesize when child precedence <= operator precedence.