Struct FieldsWithMeta 

pub struct FieldsWithMeta {
    pub fields: Fields,
    pub metadata: HashMap<String, Vec<u8>>,
}

Fields

fields: Fields

metadata: HashMap<String, Vec<u8>>

Trait Implementations

impl From<&Schema> for FieldsWithMeta

Convert a Schema to a list of protobuf Field and Metadata

fn from(schema: &Schema) -> Self

Converts to this type from the input type.

impl TryFrom<FieldsWithMeta> for Schema

Reconstruct a schema from flat protobuf fields and schema metadata.

Examples

use std::collections::HashMap;

use lance_core::datatypes::Schema;
use lance_file::datatypes::{Fields, FieldsWithMeta};

let fields = FieldsWithMeta {
    fields: Fields(Vec::new()),
    metadata: HashMap::from([("owner".to_owned(), b"lance".to_vec())]),
};
let schema = Schema::try_from(fields)?;
assert_eq!(schema.metadata["owner"], "lance");

type Error = Error

The type returned in the event of a conversion error.

fn try_from(fields_with_meta: FieldsWithMeta) -> Result<Self>

Performs the conversion.