Function arrow2::io::csv::read_async::infer

pub fn infer(bytes: &[u8]) -> DataType

Available on (crate features io_csv_read or io_csv_read_async or io_csv_write) and crate feature io_csv_read_async only.

Infers DataType from bytes

Implementation

• case insensitive “true” or “false” are mapped to DataType::Boolean
• parsable to integer is mapped to DataType::Int64
• parsable to float is mapped to DataType::Float64
• parsable to date is mapped to DataType::Date32
• parsable to time is mapped to [DataType::Time32(TimeUnit::Millisecond)]
• parsable to naive datetime is mapped to [DataType::Timestamp(TimeUnit::Millisecond, None)]
• parsable to time-aware datetime is mapped to DataType::Timestamp of milliseconds and parsed offset.
• other utf8 is mapped to DataType::Utf8
• invalid utf8 is mapped to DataType::Binary