Struct datafusion::logical_plan::DFSchema

pub struct DFSchema { /* fields omitted */ }

DFSchema wraps an Arrow schema and adds relation names

Implementations

impl DFSchema

pub fn empty() -> Self

Creates an empty DFSchema

pub fn new(fields: Vec<DFField>) -> Result<Self>

Create a new DFSchema

pub fn try_from_qualified(qualifier: &str, schema: &Schema) -> Result<Self>

Create a DFSchema from an Arrow schema

pub fn join(&self, schema: &DFSchema) -> Result<Self>

Combine two schemas

pub fn fields(&self) -> &Vec<DFField>

Get a list of fields

pub fn field(&self, i: usize) -> &DFField

Returns an immutable reference of a specific Field instance selected using an offset within the internal fields vector

pub fn index_of(&self, name: &str) -> Result<usize>

Find the index of the column with the given name

pub fn field_with_name(
    &self,
    relation_name: Option<&str>,
    name: &str
) -> Result<DFField>

Find the field with the given name

pub fn field_with_unqualified_name(&self, name: &str) -> Result<DFField>

Find the field with the given name

pub fn field_with_qualified_name(
    &self,
    relation_name: &str,
    name: &str
) -> Result<DFField>

Find the field with the given qualified name

Trait Implementations

impl Clone for DFSchema

fn clone(&self) -> DFSchema

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for DFSchema

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

Formats the value using the given formatter.

impl Display for DFSchema

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

Formats the value using the given formatter.

impl Eq for DFSchema

impl Into<Arc<Schema>> for DFSchema

fn into(self) -> SchemaRef

Performs the conversion.

impl Into<Schema> for DFSchema

fn into(self) -> Schema

Convert a schema into a DFSchema

impl PartialEq<DFSchema> for DFSchema

fn eq(&self, other: &DFSchema) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &DFSchema) -> bool

This method tests for !=.

impl StructuralEq for DFSchema

impl StructuralPartialEq for DFSchema

impl TryFrom<Schema> for DFSchema

Create a DFSchema from an Arrow schema

type Error = DataFusionError

The type returned in the event of a conversion error.

fn try_from(schema: Schema) -> Result<Self, Self::Error>

Performs the conversion.