Trait RelationFileExt 

pub trait RelationFileExt: Relation {
    // Required methods
    fn from_parquet<P: AsRef<Path>>(filepath: P) -> Result<Self, Error>
       where Self: Sized;
    fn from_csv<P: AsRef<Path>>(filepath: P) -> Result<Self, Error>
       where Self: Sized;
}

Extension trait for Relation to add file reading capabilities.

Required Methods

fn from_parquet<P: AsRef<Path>>(filepath: P) -> Result<Self, Error>

where Self: Sized,

Creates a new relation from a Parquet file with header.

This method extracts column names from the Parquet schema and the relation name from the filename.

fn from_csv<P: AsRef<Path>>(filepath: P) -> Result<Self, Error>

where Self: Sized,

Creates a new relation from a CSV file.

Note

• Each line represents a tuple, and each value in the line should be parsable into Relation::KT.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors

impl<R> RelationFileExt for R

where R: Relation,

Blanket implementation of RelationFileExt for any type that implements Relation.