Struct OpenDalCursor

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pub struct OpenDalCursor { /* private fields */ }

Expand description

Cursor for iterating through virtual table results

The cursor maintains the current position and holds the fetched data.

Trait Implementations§

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impl VTabCursor for OpenDalCursor

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fn filter( &mut self, _idx_num: c_int, _idx_str: Option<&str>, _args: &Values<'_>, ) -> Result<()>

Filter/initialize the cursor with query parameters

This is called when a query begins. Backend implementations will override this to fetch files from their specific storage.

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fn next(&mut self) -> Result<()>

Move to the next row

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fn eof(&self) -> bool

Check if we’ve reached the end of results

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fn column(&self, ctx: &mut Context, col_index: c_int) -> Result<()>

Get the value for a specific column in the current row

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fn rowid(&self) -> Result<i64>

Get the unique row ID for the current row

Auto Trait Implementations§

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impl UnwindSafe for OpenDalCursor

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> 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: 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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