Function arrow2::io::parquet::read::schema::infer_schema

pub fn infer_schema(file_metadata: &FileMetaData) -> Result<Schema>

Available on crate feature io_parquet only.

Infers a Schema from parquet’s FileMetaData. This first looks for the metadata key "ARROW:schema"; if it does not exist, it converts the parquet types declared in the file’s parquet schema to Arrow’s equivalent.

Error

This function errors iff the key "ARROW:schema" exists but is not correctly encoded, indicating that that the file’s arrow metadata was incorrectly written.