Enum QueryParam 

#[non_exhaustive]
pub enum QueryParam {
    Null,
    Bool(bool),
    Int(i32),
    BigInt(i64),
    Float(f32),
    Double(f64),
    Text(String),
    Json(Value),
}

Typed parameter wrapper that preserves JSON value types for PostgreSQL wire protocol.

This enum ensures type information is preserved when converting GraphQL input values to PostgreSQL parameters, avoiding protocol errors from type mismatches.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Null

SQL NULL value

Bool(bool)

Boolean value

Int(i32)

32-bit integer

BigInt(i64)

64-bit integer (BIGINT)

Float(f32)

32-bit floating point

Double(f64)

64-bit floating point (DOUBLE PRECISION)

Text(String)

Text/string value (TEXT/VARCHAR)

Json(Value)

JSON/JSONB value (for arrays and objects)

Trait Implementations

impl Clone for QueryParam

fn clone(&self) -> QueryParam

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for QueryParam

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

Formats the value using the given formatter.

impl From<Value> for QueryParam

Available on crate feature postgres only.

fn from(value: Value) -> Self

Converts to this type from the input type.

impl ToSql for QueryParam

Available on crate feature postgres only.

fn to_sql_checked( &self, ty: &Type, out: &mut BytesMut, ) -> Result<IsNull, Box<dyn Error + Sync + Send>>

An adaptor method used internally by Rust-Postgres.

fn to_sql( &self, ty: &Type, out: &mut BytesMut, ) -> Result<IsNull, Box<dyn Error + Sync + Send>>

Converts the value of self into the binary format of the specified Postgres Type, appending it to out.

fn accepts(_ty: &Type) -> bool

Determines if a value of this type can be converted to the specified Postgres Type.

fn encode_format(&self, _ty: &Type) -> Format

Specify the encode format