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Statement

Struct Statement 

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pub struct Statement { /* private fields */ }
Expand description

SQL statement as a pure data container.

Statement holds SQL text, parameters, timeout, and statement type. Execution is performed by Connection, not by Statement itself.

§Example

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impl Statement

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pub fn new(sql: impl Into<String>) -> Self

Create a new statement.

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pub fn sql(&self) -> &str

Get the SQL text.

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pub fn statement_type(&self) -> StatementType

Get the statement type.

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pub fn timeout_ms(&self) -> u64

Get the timeout in milliseconds.

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pub fn set_timeout(&mut self, timeout_ms: u64)

Set query timeout.

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pub fn bind<T: Into<Parameter>>( &mut self, index: usize, value: T, ) -> Result<(), QueryError>

Bind a parameter at the given index.

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  • index - Parameter index (0-based)
  • value - Parameter value
§Errors

Returns QueryError::ParameterBindingError if binding fails.

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pub fn bind_all<T: Into<Parameter> + Clone>( &mut self, params: &[T], ) -> Result<(), QueryError>

Bind multiple parameters.

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pub fn clear_parameters(&mut self)

Clear all bound parameters.

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pub fn parameters(&self) -> &[Option<Parameter>]

Get bound parameters.

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pub fn build_sql(&self) -> Result<String, QueryError>

Build the final SQL with parameters substituted.

This is used internally by Connection when executing statements.

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impl Debug for Statement

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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 Display for Statement

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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<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> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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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> ToString for T
where T: Display + ?Sized,

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fn to_string(&self) -> String

Converts the given value to a String. 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<V, T> VZip<V> for T
where V: MultiLane<T>,

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fn vzip(self) -> V

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impl<T> Allocation for T
where T: RefUnwindSafe + Send + Sync,