FileStreamState

datafusion_datasource::file_stream

Enum FileStreamState 

Source 
pub enum FileStreamState {
    Idle,
    Open {
        future: FileOpenFuture,
    },
    Scan {
        reader: BoxStream<'static, Result<RecordBatch>>,
        next: Option<NextOpen>,
    },
    Error,
    Limit,
}

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Idle

The idle state, no file is currently being read

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Open

Currently performing asynchronous IO to obtain a stream of RecordBatch for a given file

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Scan

Scanning the BoxStream returned by the completion of a FileOpenFuture returned by FileOpener::open

Fields

§reader: BoxStream<'static, Result<RecordBatch>>

The reader instance

§next: Option<NextOpen>

A FileOpenFuture for the next file to be processed. This allows the next file to be opened in parallel while the current file is read.

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Error

Encountered an error

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Limit

Reached the row limit

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