Struct datafusion::exec::DF
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pub struct DF { /* fields omitted */ }
Trait Implementations
impl DataFrame for DF
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fn repartition(&self, _n: u32) -> Result<Box<DataFrame>, DataFrameError>
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Change the number of partitions
fn select(&self, _expr: Vec<Rex>) -> Result<Box<DataFrame>, DataFrameError>
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Projection
fn filter(&self, expr: Rex) -> Result<Box<DataFrame>, DataFrameError>
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Selection
fn write(&self, filename: &str) -> Result<(), DataFrameError>
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Write to CSV ... will support other formats in the future
fn col(&self, column_name: &str) -> Result<Rex, DataFrameError>
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Return an expression representing the specified column