Enum ParamStyle 

pub enum ParamStyle {
    DollarNumbered,
    Question,
    ColonNumbered,
}

Parameter placeholder rendering style.

Decouples placeholder syntax from Dialect so drivers that speak a given SQL dialect but bind parameters differently (e.g. AWS Aurora Data API — Postgres SQL, named :N parameters) can request a non-default style without duplicating the whole dialect plumbing.

Variants

DollarNumbered

$1, $2, ... — PostgreSQL native wire protocol.

Question

? — SQLite / MySQL positional.

ColonNumbered

:1, :2, ... — AWS Aurora Data API named parameters.

Names are stringified 1-indexed ordinals, matching the SqlParameter { name: "1", ... } encoding the Data API expects.

Implementations

impl ParamStyle

pub const fn for_dialect(dialect: Dialect) -> Self

Default placeholder style for a given dialect when the driver hasn’t overridden it.

pub fn write(self, index: usize, buf: &mut impl Write)

Write the placeholder for index (1-indexed) to the buffer.

Trait Implementations

impl Clone for ParamStyle

fn clone(&self) -> ParamStyle

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ParamStyle

impl Debug for ParamStyle

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

Formats the value using the given formatter.

impl Eq for ParamStyle

impl PartialEq for ParamStyle

fn eq(&self, other: &ParamStyle) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for ParamStyle