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, )

Serialize the expression into out using writer.

fn is_ordered(&self) -> bool

True if it encodes ordering.

fn is_true(&self) -> bool

True if it is an expression that simply evaluates to true

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.