Struct lance_file::v2::reader::FileReader
source · pub struct FileReader { /* private fields */ }Implementations§
source§impl FileReader
impl FileReader
pub fn metadata(&self) -> &Arc<CachedFileMetadata>
pub async fn print_all_metadata(metadata: &CachedFileMetadata) -> Result<()>
sourcepub async fn try_open(
scheduler: FileScheduler,
projection: Schema
) -> Result<Self>
pub async fn try_open( scheduler: FileScheduler, projection: Schema ) -> Result<Self>
Opens a new file reader without any pre-existing knowledge
This will read the file schema and desired column metadata from the
pub async fn read_stream( &self, params: ReadBatchParams, batch_size: u32 ) -> Pin<Box<dyn RecordBatchStream>>
Auto Trait Implementations§
impl Freeze for FileReader
impl !RefUnwindSafe for FileReader
impl Send for FileReader
impl Sync for FileReader
impl Unpin for FileReader
impl !UnwindSafe for FileReader
Blanket Implementations§
source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more
source§impl<T> Instrument for T
impl<T> Instrument for T
source§fn instrument(self, span: Span) -> Instrumented<Self>
fn instrument(self, span: Span) -> Instrumented<Self>
source§fn in_current_span(self) -> Instrumented<Self>
fn in_current_span(self) -> Instrumented<Self>
source§impl<T> IntoEither for T
impl<T> IntoEither for T
source§fn into_either(self, into_left: bool) -> Either<Self, Self>
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 moresource§fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
fn into_either_with<F>(self, into_left: F) -> Either<Self, Self>
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