Trait QueryArg 

pub trait QueryArg {
    // Required method
    fn to_decoded(&self) -> DecodedValue;
}

A single query argument. Implemented for the scalars Pylon can bind, for Option/the common Vec element types, and for DecodedValue itself as the escape hatch for anything not covered here.

Required Methods

fn to_decoded(&self) -> DecodedValue

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl QueryArg for DateTime<Utc>

std::datetime. Pylon stores a timestamp as microseconds from the PostgreSQL epoch (2000-01-01), not the Unix epoch.

fn to_decoded(&self) -> DecodedValue

impl QueryArg for Duration

std::duration. Pylon stores an interval as its three wire components; months is always 0 here, since a std::time::Duration is a fixed span and a calendar month is not (cal::relative_duration is the type that carries one). Days stay 0 too — Postgres treats an interval’s days as calendar-relative across a DST boundary, so the whole span goes in microseconds.

fn to_decoded(&self) -> DecodedValue

impl QueryArg for NaiveDate

cal::local_date.

fn to_decoded(&self) -> DecodedValue

impl QueryArg for NaiveDateTime

cal::local_datetime.

fn to_decoded(&self) -> DecodedValue

impl QueryArg for NaiveTime

cal::local_time.

fn to_decoded(&self) -> DecodedValue

impl QueryArg for String

fn to_decoded(&self) -> DecodedValue

impl QueryArg for Uuid

fn to_decoded(&self) -> DecodedValue

impl QueryArg for Value

A json argument. Bound as JSON text rather than as a DecodedValue::Object, because that is the form pylon-pgcon accepts for a jsonb parameter regardless of whether the document’s root is an object, and it saves every call site the serde_json::to_string(&value)? it would otherwise write by hand.

fn to_decoded(&self) -> DecodedValue

impl QueryArg for Vec<String>

fn to_decoded(&self) -> DecodedValue

impl QueryArg for Vec<Uuid>

fn to_decoded(&self) -> DecodedValue

impl QueryArg for Vec<bool>

fn to_decoded(&self) -> DecodedValue

impl QueryArg for Vec<f32>

fn to_decoded(&self) -> DecodedValue

impl QueryArg for Vec<f64>

fn to_decoded(&self) -> DecodedValue

impl QueryArg for Vec<i16>

fn to_decoded(&self) -> DecodedValue

impl QueryArg for Vec<i32>

fn to_decoded(&self) -> DecodedValue

impl QueryArg for Vec<i64>

fn to_decoded(&self) -> DecodedValue

impl QueryArg for Vec<u8>

Vec<u8> is bytes, not an array of integers — matching DecodedValue::from(Vec<u8>), which takes precedence. That is also why the array impls below are enumerated per element type instead of a blanket impl<T: QueryArg> QueryArg for Vec<T>: the blanket form would overlap this one, and Rust won’t accept the pair on the grounds that u8 merely happens not to implement QueryArg today.

fn to_decoded(&self) -> DecodedValue

impl QueryArg for [String]

fn to_decoded(&self) -> DecodedValue

impl QueryArg for [Uuid]

fn to_decoded(&self) -> DecodedValue

impl QueryArg for [bool]

fn to_decoded(&self) -> DecodedValue

impl QueryArg for [f32]

fn to_decoded(&self) -> DecodedValue

impl QueryArg for [f64]

fn to_decoded(&self) -> DecodedValue

impl QueryArg for [i16]

fn to_decoded(&self) -> DecodedValue

impl QueryArg for [i32]

fn to_decoded(&self) -> DecodedValue

impl QueryArg for [i64]

fn to_decoded(&self) -> DecodedValue

impl QueryArg for bool

fn to_decoded(&self) -> DecodedValue

impl QueryArg for f32

fn to_decoded(&self) -> DecodedValue

impl QueryArg for f64

fn to_decoded(&self) -> DecodedValue

impl QueryArg for i16

fn to_decoded(&self) -> DecodedValue

impl QueryArg for i32

fn to_decoded(&self) -> DecodedValue

impl QueryArg for i64

fn to_decoded(&self) -> DecodedValue

impl QueryArg for str

fn to_decoded(&self) -> DecodedValue

impl<T: QueryArg + ?Sized> QueryArg for &T

fn to_decoded(&self) -> DecodedValue

impl<T: QueryArg> QueryArg for Option<T>

An absent optional argument (<optional str>$x) binds as NULL.

fn to_decoded(&self) -> DecodedValue

Implementors

impl QueryArg for DecodedValue