Struct pg_worm::query::Update

pub struct Update<'a, State = NoneSet> { /* private fields */ }

A struct for building UPDATE queries.

The query can only be executed once at least one update has been made.

Implementations

impl<'a, T> Update<'a, T>

pub fn new(table: &'static str) -> Update<'a, NoneSet>

Begin building a new UPDATE query.

pub fn where_(self, where_: Where<'a>) -> Update<'a, T>

Add a WHERE to the query.

If called multiple times, the conditions are joined using AND.

pub fn set<U: ToSql + Sync>( self, col: TypedColumn<U>, value: &'a U ) -> Update<'a, SomeSet>

Add a SET instruction to your UPDATE query.

This function has to be called at least once before you can execute the query.

Trait Implementations

impl<'a> IntoFuture for Update<'a, SomeSet>where Update<'a, SomeSet>: ToQuery<'a, u64>, Query<'a, u64>: Executable<Output = u64>,

type Output = Result<u64, Error>

The output that the future will produce on completion.

type IntoFuture = Pin<Box<dyn Future<Output = <Update<'a, SomeSet> as IntoFuture>::Output> + 'a, Global>>

Which kind of future are we turning this into?

fn into_future(self) -> Self::IntoFuture

Creates a future from a value.

impl<'a> PushChunk<'a> for Update<'a, SomeSet>

fn push_to_buffer<T>(&mut self, buffer: &mut Query<'a, T>)

Pushes the containing string and the params to the provided buffer.

impl<'a> ToQuery<'a, u64> for Update<'a, SomeSet>

fn to_query(&mut self) -> Query<'a, T>

A default implementation for building a query which can then be executed.