Struct QuerySessionContext

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pub struct QuerySessionContext(/* private fields */);

Expand description

Wrapper for ClickHouseSessionContext to allow implementing QuerySession with ClickHouse capabilities. This is needed in order to allow function pushdown and ClickHouse semantics during DataFusion query execution.

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impl QuerySessionContext

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pub fn new() -> Self

Create a new QuerySessionContext wrapped with ClickHouse capabilities.

NOTE: The settings applied below are due to arrow-js missing support for “View” types.

Once a PR is merged that enables support, those settings can be removed. The PR currently tracking this is #311

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impl Clone for QuerySessionContext

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fn clone(&self) -> QuerySessionContext

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 Default for QuerySessionContext

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fn default() -> Self

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

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impl QuerySession for QuerySessionContext

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fn as_session(&self) -> &SessionContext

Access the underlying SessionContext for registration or low-level control.

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fn capabilities(&self) -> &[SessionCapability]

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fn sql<'life0, 'life1, 'async_trait>( &'life0 self, sql: &'life1 str, ) -> Pin<Box<dyn Future<Output = Result<DataFrame>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait,

Execute SQL and return a DataFrame for streaming.

Auto Trait Implementations§

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impl !UnwindSafe for QuerySessionContext

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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> FromRef<T> for T
where T: Clone,

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fn from_ref(input: &T) -> T

Converts to this type from a reference to the input type.

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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 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> IntoEither for T

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fn into_either(self, into_left: bool) -> Either<Self, Self>

Converts self into a Left variant of Either<Self, Self> if into_left is true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
where F: FnOnce(&Self) -> bool,

Converts self into a Left variant of Either<Self, Self> if into_left(&self) returns true. Converts self into a Right variant of Either<Self, Self> otherwise. Read more

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