pub struct CachedParquetFileReaderFactory { /* private fields */ }Expand description
Implementation of ParquetFileReaderFactory supporting the caching of footer and page
metadata. Reads and updates the FileMetadataCache with the ParquetMetaData data.
This reader always loads the entire metadata (including page index, unless the file is
encrypted), even if not required by the current query, to ensure it is always available for
those that need it.
Implementations§
Source§impl CachedParquetFileReaderFactory
impl CachedParquetFileReaderFactory
pub fn new( store: Arc<dyn ObjectStore>, metadata_cache: Arc<dyn FileMetadataCache>, ) -> Self
Trait Implementations§
Source§impl ParquetFileReaderFactory for CachedParquetFileReaderFactory
impl ParquetFileReaderFactory for CachedParquetFileReaderFactory
Source§fn create_reader(
&self,
partition_index: usize,
partitioned_file: PartitionedFile,
metadata_size_hint: Option<usize>,
metrics: &ExecutionPlanMetricsSet,
) -> Result<Box<dyn AsyncFileReader + Send>>
fn create_reader( &self, partition_index: usize, partitioned_file: PartitionedFile, metadata_size_hint: Option<usize>, metrics: &ExecutionPlanMetricsSet, ) -> Result<Box<dyn AsyncFileReader + Send>>
Provides an
AsyncFileReader for reading data from a parquet file specified Read moreAuto Trait Implementations§
impl Freeze for CachedParquetFileReaderFactory
impl !RefUnwindSafe for CachedParquetFileReaderFactory
impl Send for CachedParquetFileReaderFactory
impl Sync for CachedParquetFileReaderFactory
impl Unpin for CachedParquetFileReaderFactory
impl !UnwindSafe for CachedParquetFileReaderFactory
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> 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