Method build

datafusion/datasource/src/file_scan_config/mod.rs:512–552

Build the final [`FileScanConfig`] with all the configured settings. This method takes ownership of the builder and returns the constructed `FileScanConfig`. Any unset optional fields will use their default values. # Errors Returns an error if projection pushdown fails or if schema operations fail.

(self)

    /// # Errors
    /// Returns an error if projection pushdown fails or if schema operations fail.
    pub fn build(self) -> FileScanConfig {
        let Self {
            object_store_url,
            file_source,
            limit,
            preserve_order,
            constraints,
            file_groups,
            statistics,
            output_ordering,
            file_compression_type,
            batch_size,
            expr_adapter_factory: expr_adapter,
            partitioned_by_file_group,
        } = self;

        let constraints = constraints.unwrap_or_default();
        let statistics = statistics.unwrap_or_else(|| {
            Statistics::new_unknown(file_source.table_schema().table_schema())
        });
        let file_compression_type =
            file_compression_type.unwrap_or(FileCompressionType::UNCOMPRESSED);

        // If there is an output ordering, we should preserve it.
        let preserve_order = preserve_order || !output_ordering.is_empty();

        FileScanConfig {
            object_store_url,
            file_source,
            limit,
            preserve_order,
            constraints,
            file_groups,
            output_ordering,
            file_compression_type,
            batch_size,
            expr_adapter_factory: expr_adapter,
            statistics,
            partitioned_by_file_group,
        }
    }
}

impl From<FileScanConfig> for FileScanConfigBuilder {