Module arrow::csv::reader

CSV Reader

This CSV reader allows CSV files to be read into the Arrow memory model. Records are loaded in batches and are then converted from row-based data to columnar data.

Example:

use arrow::csv;
use arrow::datatypes::{DataType, Field, Schema};
use std::fs::File;
use std::sync::Arc;

let schema = Schema::new(vec![
    Field::new("city", DataType::Utf8, false),
    Field::new("lat", DataType::Float64, false),
    Field::new("lng", DataType::Float64, false),
]);

let file = File::open("test/data/uk_cities.csv").unwrap();

let mut csv = csv::Reader::new(file, Arc::new(schema), false, None, 1024, None, None);
let batch = csv.next().unwrap().unwrap();

Structs

Reader	CSV file reader
ReaderBuilder	CSV file reader builder

Functions

infer_schema_from_files

Infer schema from a list of CSV files by reading through first n records with max_read_records controlling the maximum number of records to read.