Trait BulkReader 

pub trait BulkReader {
    // Required methods
    fn schema(&self) -> &CopySchema;
    fn next_batch(
        &mut self,
        max_rows: usize,
    ) -> Result<Option<Vec<Vec<SqlValue>>>>;
}

バッチリーダー。

Required Methods

fn schema(&self) -> &CopySchema

入力スキーマを返す。

fn next_batch(&mut self, max_rows: usize) -> Result<Option<Vec<Vec<SqlValue>>>>

最大 max_rows 行のバッチを返す。終端で None。

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl BulkReader for CsvReader

impl BulkReader for ParquetReader