Struct IsConstant 

pub struct IsConstant;

Trait Implementations

impl Debug for IsConstant

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

Formats the value using the given formatter.

impl Default for IsConstant

fn default() -> IsConstant

Returns the “default value” for a type.

impl ExpressionVisitor for IsConstant

fn visit_operand( &mut self, writer: &dyn SqlWriter, context: &mut Context, out: &mut DynQuery, value: &Operand<'_>, ) -> bool

fn visit_column( &mut self, _writer: &dyn SqlWriter, _context: &mut Context, _out: &mut DynQuery, _value: &ColumnRef, ) -> bool

fn visit_unary_op( &mut self, _writer: &dyn SqlWriter, _context: &mut Context, _out: &mut DynQuery, _value: &UnaryOp<&dyn Expression>, ) -> bool

fn visit_binary_op( &mut self, _writer: &dyn SqlWriter, _context: &mut Context, _out: &mut DynQuery, _value: &BinaryOp<&dyn Expression, &dyn Expression>, ) -> bool

fn visit_ordered( &mut self, _writer: &dyn SqlWriter, _context: &mut Context, _out: &mut DynQuery, _value: &Ordered<&dyn Expression>, ) -> bool