vegafusion_dataframe::connection

Trait Connection

Source 
pub trait Connection:
    Send
    + Sync
    + 'static {
    // Required methods
    fn id(&self) -> String;
    fn tables<'life0, 'async_trait>(
        &'life0 self,
    ) -> Pin<Box<dyn Future<Output = Result<HashMap<String, Schema>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait;

    // Provided methods
    fn scan_table<'life0, 'life1, 'async_trait>(
        &'life0 self,
        _name: &'life1 str,
    ) -> Pin<Box<dyn Future<Output = Result<Arc<dyn DataFrame>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait { ... }
    fn scan_arrow<'life0, 'async_trait>(
        &'life0 self,
        _table: VegaFusionTable,
    ) -> Pin<Box<dyn Future<Output = Result<Arc<dyn DataFrame>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait { ... }
    fn scan_csv<'life0, 'life1, 'async_trait>(
        &'life0 self,
        _url: &'life1 str,
        _opts: CsvReadOptions,
    ) -> Pin<Box<dyn Future<Output = Result<Arc<dyn DataFrame>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait { ... }
    fn scan_arrow_file<'life0, 'life1, 'async_trait>(
        &'life0 self,
        _url: &'life1 str,
    ) -> Pin<Box<dyn Future<Output = Result<Arc<dyn DataFrame>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait { ... }
    fn scan_parquet<'life0, 'life1, 'async_trait>(
        &'life0 self,
        _url: &'life1 str,
    ) -> Pin<Box<dyn Future<Output = Result<Arc<dyn DataFrame>>> + Send + 'async_trait>>
       where Self: 'async_trait,
             'life0: 'async_trait,
             'life1: 'async_trait { ... }
}

Required Methods§

Source

fn id(&self) -> String

Source

fn tables<'life0, 'async_trait>( &'life0 self, ) -> Pin<Box<dyn Future<Output = Result<HashMap<String, Schema>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Name and schema of the tables that are provided by this connection

Provided Methods§

Source

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

Scan a named table into a DataFrame

Source

fn scan_arrow<'life0, 'async_trait>( &'life0 self, _table: VegaFusionTable, ) -> Pin<Box<dyn Future<Output = Result<Arc<dyn DataFrame>>> + Send + 'async_trait>>
where Self: 'async_trait, 'life0: 'async_trait,

Scan a VegaFusionTable into a DataFrame

Source

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

Scan a CSV file into a DataFrame

Source

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

Scan an Arrow file (aka Feather file) into a DataFrame

Source

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

Scan an Parquet file into a DataFrame

Implementors§