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DynamicRow

Struct DynamicRow 

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

A row decoded into the dynamic CellValue vocabulary.

Values are stored in column order and can be accessed by zero-based index or by raw column name.

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impl DynamicRow

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pub fn schema(&self) -> &Schema

Borrow the shared schema this row was decoded against.

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pub fn values(&self) -> &[CellValue]

Borrow all decoded values in column order.

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pub fn value(&self, name: &str) -> StdResult<&CellValue, SchemaError>

Borrow the value of a column resolved by raw label (case-sensitive).

§Errors

Returns SchemaError::MissingColumn when no column carries the name, or SchemaError::AmbiguousColumn when several do.

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pub fn value_at(&self, index: usize) -> StdResult<&CellValue, SchemaError>

Borrow the value at a zero-based column index.

§Errors

Returns SchemaError::InvalidColumnIndex when index is out of range for this row’s schema.

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pub fn take(&mut self, name: &str) -> StdResult<CellValue, SchemaError>

Move a value out of the row by raw label, replacing the slot with CellValue::Null.

§Errors

Returns SchemaError::MissingColumn when no column carries the name, or SchemaError::AmbiguousColumn when several do.

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pub fn take_at(&mut self, index: usize) -> StdResult<CellValue, SchemaError>

Move a value out of the row by zero-based column index, replacing the slot with CellValue::Null.

§Errors

Returns SchemaError::InvalidColumnIndex when index is out of range for this row’s schema.

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pub fn into_parts(self) -> (Arc<Schema>, Box<[CellValue]>)

Consume the row, returning the shared schema and the decoded values in column order.

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pub fn into_json_object(self) -> StdResult<Map<String, Value>, SchemaError>

Consume the row into a serde_json::Map keyed by raw column label.

§Errors

Returns SchemaError::DuplicateColumnName when two columns share the same raw label — JSON object keys must be unique.

Trait Implementations§

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impl Clone for DynamicRow

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fn clone(&self) -> DynamicRow

Returns a duplicate of the value. Read more
1.0.0 (const: unstable) · Source§

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

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

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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 FromRow for DynamicRow

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type Plan = Arc<Schema>

Per-result-schema state reused while decoding rows. Read more
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fn build_plan(ctx: RowPlanContext<'_>) -> PlanBuildResult<Self::Plan>

Build the per-result-schema decode plan from the result-set metadata. Read more
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fn from_row_with_plan( row: RowRef<'_>, plan: &Self::Plan, ) -> RowDecodeResult<Self>

Decode a single row using the associated plan. Read more
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impl PartialEq for DynamicRow

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

Equality operator ==. Read more
1.0.0 (const: unstable) · Source§

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=. Read more
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impl StructuralPartialEq for DynamicRow

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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
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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<A, B, T> HttpServerConnExec<A, B> for T
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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 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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fn and<P, B, E>(self, other: P) -> And<T, P>
where T: Sized + Policy<B, E>, P: Policy<B, E>,

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fn or<P, B, E>(self, other: P) -> Or<T, P>
where T: Sized + Policy<B, E>, P: Policy<B, E>,

Create a new Policy that returns Action::Follow if either self or other returns Action::Follow. Read more
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type Output = T

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

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