Enum ParamFormat 

pub enum ParamFormat {
    Text,
    Binary,
}

Wire format for a bound parameter in the Bind message.

Distinct from ColumnFormat, which describes result columns and carries a third HyperBinary variant. Parameters only ever travel as PostgreSQL text or PostgreSQL binary — Hyper has no HyperBinary input decoder for bound parameters.

Binary is the default and the fast path. Text exists because Hyper has no PG-binary input function for a couple of types:

• scaled NUMERIC — a binary NUMERIC whose dscale exceeds the parameter’s resolved scale is rejected with SQLSTATE 0A000 (“cannot handle truncation when reading numerics”).
• geography — rejected with 42883, “no pg binary input function available for type geography”.

The Bind message carries a per-parameter format-code array, so a single statement can mix both.

Variants

Text

PostgreSQL text format (format code 0) — the value’s SQL literal representation, sent as UTF-8 without surrounding quotes.

Binary

Standard PostgreSQL binary format (format code 1, big-endian).

Implementations

impl ParamFormat

pub const BINARY_CODE: i16 = 1

Wire format code for ParamFormat::Binary.

pub const TEXT_CODE: i16 = 0

Wire format code for ParamFormat::Text.

pub fn to_code(self) -> i16

Returns the wire protocol format code (0 = text, 1 = binary).

pub fn is_binary(self) -> bool

Returns true if this is the binary format.

Trait Implementations

impl Clone for ParamFormat

fn clone(&self) -> ParamFormat

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ParamFormat

impl Debug for ParamFormat

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

Formats the value using the given formatter.

impl Default for ParamFormat

fn default() -> ParamFormat

Returns the “default value” for a type.

impl Eq for ParamFormat

impl PartialEq for ParamFormat

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ParamFormat