Trait SelfDescribingFileReader

pub trait SelfDescribingFileReader {
    // Required method
    fn try_new_self_described_from_reader<'life0, 'async_trait>(
        reader: Arc<dyn Reader>,
        cache: Option<&'life0 FileMetadataCache>,
    ) -> Pin<Box<dyn Future<Output = Result<Self>> + Send + 'async_trait>>
       where Self: Sized + 'async_trait,
             'life0: 'async_trait;

    // Provided method
    fn try_new_self_described<'life0, 'life1, 'life2, 'async_trait>(
        object_store: &'life0 ObjectStore,
        path: &'life1 Path,
        cache: Option<&'life2 FileMetadataCache>,
    ) -> Pin<Box<dyn Future<Output = Result<Self>> + Send + 'async_trait>>
       where Self: Sized + Send + 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait,
             'life2: 'async_trait { ... }
}

Required Methods

fn try_new_self_described_from_reader<'life0, 'async_trait>( reader: Arc<dyn Reader>, cache: Option<&'life0 FileMetadataCache>, ) -> Pin<Box<dyn Future<Output = Result<Self>> + Send + 'async_trait>>

where Self: Sized + 'async_trait, 'life0: 'async_trait,

Provided Methods

fn try_new_self_described<'life0, 'life1, 'life2, 'async_trait>( object_store: &'life0 ObjectStore, path: &'life1 Path, cache: Option<&'life2 FileMetadataCache>, ) -> Pin<Box<dyn Future<Output = Result<Self>> + Send + 'async_trait>>

where Self: Sized + Send + 'async_trait, 'life0: 'async_trait, 'life1: 'async_trait, 'life2: 'async_trait,

Open a file reader without any cached schema

In this case the schema will first need to be loaded from the file itself.

When loading files from a dataset it is preferable to use the fragment reader to avoid this overhead.

Implementations on Foreign Types

impl SelfDescribingFileReader for FileReader

fn try_new_self_described_from_reader<'life0, 'async_trait>( reader: Arc<dyn Reader>, cache: Option<&'life0 FileMetadataCache>, ) -> Pin<Box<dyn Future<Output = Result<Self>> + Send + 'async_trait>>

where Self: 'async_trait, 'life0: 'async_trait,

Implementors