Struct SchemaBuilder 

pub struct SchemaBuilder { /* private fields */ }

Builder for constructing Arrow schemas from Exasol metadata.

Implementations

impl SchemaBuilder

pub fn new() -> Self

Create a new schema builder.

pub fn add_column(self, column: ColumnMetadata) -> Self

Add a column to the schema.

pub fn add_columns(self, columns: Vec<ColumnMetadata>) -> Self

Add multiple columns to the schema.

pub fn build(self) -> Result<Schema, ConversionError>

Build the Arrow schema.

Returns

An Arrow Schema with all columns converted to Arrow types

Errors

Returns ConversionError if any column type cannot be mapped

pub fn build_with_metadata( self, metadata: HashMap<String, String>, ) -> Result<Schema, ConversionError>

Build the Arrow schema with additional schema-level metadata.

Trait Implementations

impl Default for SchemaBuilder

fn default() -> Self

Returns the “default value” for a type.