Function arrow2::io::parquet::read::read_columns_indexes

pub fn read_columns_indexes<R: Read + Seek>(
    reader: &mut R, 
    chunks: &[ColumnChunkMetaData], 
    fields: &[Field]
) -> Result<Vec<ColumnIndex>, ArrowError>

Available on crate feature io_parquet only.

Reads the column indexes from the reader assuming a valid set of derived Arrow fields for all parquet the columns in the file.

This function is expected to be used to filter out parquet pages.

Implementation

This function is IO-bounded and calls reader.read_exact exactly once.

Error

Errors iff the indexes can’t be read or their deserialization to arrow is incorrect (e.g. invalid utf-8)