Struct parquet2::metadata::SchemaDescriptor

pub struct SchemaDescriptor { /* private fields */ }

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>) -> Self

Creates new schema descriptor from Parquet schema.

pub fn column(&self, i: usize) -> &ColumnDescriptor

Returns ColumnDescriptor for a field position.

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

Returns slice of ColumnDescriptor.

pub fn num_columns(&self) -> usize

Returns number of leaf-level columns.

pub fn name(&self) -> &str

Returns schema name.

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

pub fn try_from_message(message: &str) -> Result<Self>

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

Formats the value using the given formatter.