Struct arrow2::io::parquet::read::schema::SchemaDescriptor

pub struct SchemaDescriptor { /* private fields */ }

Available on crate feature io_parquet only.

A schema descriptor. This encapsulates the top-level schemas for all the columns, as well as all descriptors for all the primitive columns.

Implementations

impl SchemaDescriptor

pub fn new(name: String, fields: Vec<ParquetType, Global>) -> SchemaDescriptor

Creates new schema descriptor from Parquet schema.

pub fn columns(&self) -> &[ColumnDescriptor]

The ColumnDescriptor (leafs) of this schema.

Note that, for nested fields, this may contain more entries than the number of fields in the file - e.g. a struct field may have two columns.

pub fn name(&self) -> &str

The schemas’ name.

pub fn fields(&self) -> &[ParquetType]

The schemas’ fields.

pub fn try_from_message(message: &str) -> Result<SchemaDescriptor, Error>

Creates a schema from

Trait Implementations

impl Clone for SchemaDescriptor

fn clone(&self) -> SchemaDescriptor

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SchemaDescriptor

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.