Struct deltalake::datafusion::prelude::AvroReadOptions

pub struct AvroReadOptions<'a> {
    pub schema: Option<&'a Schema>,
    pub file_extension: &'a str,
    pub table_partition_cols: Vec<(String, DataType)>,
}

Options that control the reading of AVRO files.

Note this structure is supplied when a datasource is created and can not not vary from statement to statement. For settings that can vary statement to statement see ConfigOptions.

Fields

schema: Option<&'a Schema>

The data source schema.

file_extension: &'a str

File extension; only files with this extension are selected for data input. Defaults to FileType::AVRO.get_ext().as_str().

table_partition_cols: Vec<(String, DataType)>

Partition Columns

Implementations

impl<'a> AvroReadOptions<'a>

pub fn table_partition_cols( self, table_partition_cols: Vec<(String, DataType)> ) -> AvroReadOptions<'a>

Specify table_partition_cols for partition pruning

pub fn schema(self, schema: &'a Schema) -> AvroReadOptions<'a>

Specify schema to use for AVRO read

Trait Implementations

impl<'a> Clone for AvroReadOptions<'a>

fn clone(&self) -> AvroReadOptions<'a>

Returns a copy of the value.

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

Performs copy-assignment from source.

impl<'a> Default for AvroReadOptions<'a>

fn default() -> AvroReadOptions<'a>

Returns the “default value” for a type.

impl ReadOptions<'_> for AvroReadOptions<'_>

fn to_listing_options( &self, config: &SessionConfig, _table_options: TableOptions ) -> ListingOptions

Helper to convert these user facing options to ListingTable options

fn get_resolved_schema<'life0, 'life1, 'async_trait>( &'life0 self, config: &'life1 SessionConfig, state: SessionState, table_path: ListingTableUrl ) -> Pin<Box<dyn Future<Output = Result<Arc<Schema>, DataFusionError>> + Send + 'async_trait>>

where 'life0: 'async_trait, 'life1: 'async_trait, AvroReadOptions<'_>: 'async_trait,

Infer and resolve the schema from the files/sources provided.

fn _get_resolved_schema<'life0, 'async_trait>( &'a self, config: &'life0 SessionConfig, state: SessionState, table_path: ListingTableUrl, schema: Option<&'a Schema> ) -> Pin<Box<dyn Future<Output = Result<Arc<Schema>, DataFusionError>> + Send + 'async_trait>>

where 'a: 'async_trait, 'a: 'async_trait, 'life0: 'async_trait, Self: Sync + 'async_trait,

helper function to reduce repetitive code. Infers the schema from sources if not provided. Infinite data sources not supported through this function.