Struct JsonSource 

pub struct JsonSource { /* private fields */ }

JsonSource holds the extra configuration that is necessary for JsonOpener

Implementations

impl JsonSource

pub fn new(table_schema: impl Into<TableSchema>) -> Self

Initialize a JsonSource with the provided schema

pub fn with_newline_delimited(self, newline_delimited: bool) -> Self

Set whether to read as newline-delimited JSON.

When true (default), expects newline-delimited format. When false, expects JSON array format [{...}, {...}].

impl JsonSource

pub fn try_from_proto( node: &PhysicalPlanNode, ctx: &ExecutionPlanDecodeCtx<'_>, ) -> Result<Arc<dyn ExecutionPlan>>

Reconstructs a DataSourceExec from a protobuf JsonScan.

Defaults to newline-delimited JSON because protobuf does not encode the mode.

Trait Implementations

impl Clone for JsonSource

fn clone(&self) -> JsonSource

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl FileSource for JsonSource

fn try_to_proto( &self, base: &FileScanConfig, ctx: &ExecutionPlanEncodeCtx<'_>, ) -> Result<Option<PhysicalPlanNode>>

Emit a JsonScan node wrapping the shared base config.

fn create_file_opener( &self, object_store: Arc<dyn ObjectStore>, base_config: &FileScanConfig, _partition: usize, ) -> Result<Arc<dyn FileOpener>>

Creates a dyn FileOpener based on given parameters.

fn table_schema(&self) -> &TableSchema

Returns the table schema for the overall table (including partition columns, if any)

fn with_batch_size(&self, batch_size: usize) -> Arc<dyn FileSource>

Initialize new type with batch size configuration

fn try_pushdown_projection( &self, projection: &ProjectionExprs, ) -> Result<Option<Arc<dyn FileSource>>>

Try to push down a projection into this FileSource.

fn projection(&self) -> Option<&ProjectionExprs>

Return the projection that will be applied to the output stream on top of Self::table_schema.

fn metrics(&self) -> &ExecutionPlanMetricsSet

Return execution plan metrics

fn file_type(&self) -> &str

String representation of file source such as “csv”, “json”, “parquet”

fn apply_expressions( &self, f: &mut dyn FnMut(&Arc<dyn PhysicalExpr>) -> Result<TreeNodeRecursion>, ) -> Result<TreeNodeRecursion>

Apply a function to all physical expressions used by this file source.

fn create_morselizer( &self, object_store: Arc<dyn ObjectStore>, base_config: &FileScanConfig, partition: usize, ) -> Result<Box<dyn Morselizer>, DataFusionError>

Creates a dyn Morselizer based on given parameters.

fn filter(&self) -> Option<Arc<dyn PhysicalExpr>>

Returns the filter expression that will be applied during the file scan.

fn fmt_extra( &self, _t: DisplayFormatType, _f: &mut Formatter<'_>, ) -> Result<(), Error>

Format FileType specific information

fn supports_repartitioning(&self) -> bool

Returns whether this file source supports repartitioning files by byte ranges.

fn repartitioned( &self, target_partitions: usize, repartition_file_min_size: usize, output_ordering: Option<LexOrdering>, config: &FileScanConfig, ) -> Result<Option<FileScanConfig>, DataFusionError>

If supported by the FileSource, redistribute files across partitions according to their size. Allows custom file formats to implement their own repartitioning logic.

fn try_pushdown_filters( &self, filters: Vec<Arc<dyn PhysicalExpr>>, _config: &ConfigOptions, ) -> Result<FilterPushdownPropagation<Arc<dyn FileSource>>, DataFusionError>

Try to push down filters into this FileSource.

fn try_pushdown_sort( &self, order: &[PhysicalSortExpr], eq_properties: &EquivalenceProperties, ) -> Result<SortOrderPushdownResult<Arc<dyn FileSource>>, DataFusionError>

Try to create a new FileSource that can produce data in the specified sort order.

fn try_reverse_output( &self, _order: &[PhysicalSortExpr], _eq_properties: &EquivalenceProperties, ) -> Result<SortOrderPushdownResult<Arc<dyn FileSource>>, DataFusionError>

👎Deprecated since 53.0.0:

Renamed to try_pushdown_sort. This method was never limited to reversing output. It will be removed in 59.0.0 or later.

Deprecated: Renamed to Self::try_pushdown_sort.

fn reorder_files(&self, files: Vec<PartitionedFile>) -> Vec<PartitionedFile>

Reorder files in the shared work queue to optimize query performance.

fn with_schema_adapter_factory( &self, _factory: Arc<dyn SchemaAdapterFactory>, ) -> Result<Arc<dyn FileSource>, DataFusionError>

👎Deprecated since 53.0.0:

SchemaAdapterFactory has been removed. Use PhysicalExprAdapterFactory instead. See upgrading.md for more details.

Deprecated: Set optional schema adapter factory.

fn schema_adapter_factory(&self) -> Option<Arc<dyn SchemaAdapterFactory>>

👎Deprecated since 53.0.0:

SchemaAdapterFactory has been removed. Use PhysicalExprAdapterFactory instead. See upgrading.md for more details.

Deprecated: Returns the current schema adapter factory if set.

impl From<JsonSource> for Arc<dyn FileSource>

fn from(source: JsonSource) -> Self

Converts to this type from the input type.