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Dialect

Enum Dialect 

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pub enum Dialect {
    Postgres,
    Sqlite,
    Mysql,
}
Expand description

A database connection capable of executing queries.

All operations are async and take a Cx context for cancellation/timeout support. Implementations must be Send + Sync for use across async boundaries.

§Transaction Support

Use begin or begin_with to start transactions. Transactions must be explicitly committed or rolled back.

§Example

// Execute a simple query
let rows = conn.query(&cx, "SELECT * FROM users WHERE id = $1", &[Value::Int(1)]).await?;

// Use a transaction
let mut tx = conn.begin(&cx).await?;
tx.execute(&cx, "INSERT INTO logs (msg) VALUES ($1)", &[Value::Text("action".into())]).await?;
tx.commit(&cx).await?;

SQL dialect enumeration for cross-database compatibility.

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Postgres

PostgreSQL dialect (uses $1, $2 placeholders)

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Sqlite

SQLite dialect (uses ?1, ?2 placeholders)

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Mysql

MySQL dialect (uses ? placeholders)

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impl Dialect

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pub fn placeholder(self, index: usize) -> String

Generate a placeholder for the given parameter index (1-based).

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pub const fn concat_op(self) -> &'static str

Get the string concatenation operator for this dialect.

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pub const fn supports_ilike(self) -> bool

Check if this dialect supports ILIKE.

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pub fn quote_identifier(self, name: &str) -> String

Quote an identifier for this dialect.

Properly escapes embedded quote characters by doubling them:

  • For Postgres/SQLite: " becomes ""
  • For MySQL: ` becomes ``

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impl Clone for Dialect

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fn clone(&self) -> Dialect

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for Dialect

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

Formats the value using the given formatter. Read more
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impl Default for Dialect

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fn default() -> Dialect

Returns the “default value” for a type. Read more
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impl PartialEq for Dialect

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

Tests for self and other values to be equal, and is used by ==.
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fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.
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impl Copy for Dialect

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impl Eq for Dialect

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impl StructuralPartialEq for Dialect

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> CloneToUninit for T
where T: Clone,

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unsafe fn clone_to_uninit(&self, dest: *mut u8)

🔬This is a nightly-only experimental API. (clone_to_uninit)
Performs copy-assignment from self to dest. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T> Instrument for T

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fn instrument(self, _span: NoopSpan) -> Self

Instruments this future with a span (no-op when disabled).
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fn in_current_span(self) -> Self

Instruments this future with the current span (no-op when disabled).
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impl<T> Instrument for T

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fn instrument(self, span: Span) -> Instrumented<Self>

Instruments this type with the provided Span, returning an Instrumented wrapper. Read more
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fn in_current_span(self) -> Instrumented<Self>

Instruments this type with the current Span, returning an Instrumented wrapper. Read more
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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> Same for T

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type Output = T

Should always be Self
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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.
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impl<T> WithSubscriber for T

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fn with_subscriber<S>(self, subscriber: S) -> WithDispatch<Self>
where S: Into<Dispatch>,

Attaches the provided Subscriber to this type, returning a WithDispatch wrapper. Read more
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fn with_current_subscriber(self) -> WithDispatch<Self>

Attaches the current default Subscriber to this type, returning a WithDispatch wrapper. Read more