Struct SchemaMapper 

pub struct SchemaMapper;

Schema mapper for converting HANA metadata to Arrow schema.

Provides utilities for building Arrow schemas from HANA ResultSet metadata.

Example

use hdbconnect_arrow::schema::SchemaMapper;

let schema = SchemaMapper::from_result_set(&result_set);
let fields = schema.fields();

Implementations

impl SchemaMapper

pub const fn new() -> Self

Create a new schema mapper.

pub fn from_result_set(result_set: &ResultSet) -> Schema

Build an Arrow schema from HANA ResultSet metadata.

Arguments

• result_set - The HANA ResultSet to extract metadata from

pub fn from_field_metadata(metadata: &[FieldMetadata]) -> Schema

Build an Arrow schema from a slice of HANA FieldMetadata.

Arguments

• metadata - Slice of HANA field metadata

pub fn schema_ref_from_result_set(result_set: &ResultSet) -> SchemaRef

Build an Arrow SchemaRef from HANA ResultSet metadata.

Returns an Arc<Schema> for efficient sharing.

pub fn schema_ref_from_field_metadata(metadata: &[FieldMetadata]) -> SchemaRef

Build an Arrow SchemaRef from HANA field metadata.

Returns an Arc<Schema> for efficient sharing.

Trait Implementations

impl Clone for SchemaMapper

fn clone(&self) -> SchemaMapper

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for SchemaMapper

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

Formats the value using the given formatter.

impl Default for SchemaMapper

fn default() -> SchemaMapper

Returns the “default value” for a type.