Struct LogicalSchema 

pub struct LogicalSchema { /* private fields */ }

Logical schema metadata describing the ordered collection of logical columns.

Implementations

impl LogicalSchema

pub fn to_arrow_schema(&self) -> Result<Schema, SchemaConvertError>

Convert this logical schema to an owned Arrow Schema.

Fails if any column uses a logical type that cannot be represented in Arrow (see SchemaConvertError).

pub fn to_arrow_schema_ref(&self) -> Result<Arc<Schema>, SchemaConvertError>

Convert this logical schema to a shared Arrow SchemaRef.

This is a convenience wrapper around Self::to_arrow_schema.

impl LogicalSchema

pub fn new( columns: Vec<LogicalField>, ) -> Result<LogicalSchema, LogicalSchemaError>

Construct a validated logical schema (rejects duplicate column names).

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

Borrow the logical columns.

Trait Implementations

impl Clone for LogicalSchema

fn clone(&self) -> LogicalSchema

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for LogicalSchema

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for LogicalSchema

fn deserialize<__D>( __deserializer: __D, ) -> Result<LogicalSchema, <__D as Deserializer<'de>>::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl PartialEq for LogicalSchema

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Serialize for LogicalSchema

fn serialize<__S>( &self, __serializer: __S, ) -> Result<<__S as Serializer>::Ok, <__S as Serializer>::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for LogicalSchema

impl StructuralPartialEq for LogicalSchema