dataframe-0.3.3.2: A fast, safe, and intuitive DataFrame library.

Safe Haskell	None
Language	Haskell2010

DataFrame.IO.Parquet

Synopsis

readParquet :: FilePath -> IO DataFrame
readMetadataFromPath :: FilePath -> IO FileMetadata
readMetadataSizeFromFooter :: ByteString -> (Int, ByteString)
getColumnPaths :: [SchemaElement] -> [(Text, Int)]
processColumnPages :: (Int, Int) -> [Page] -> ParquetType -> ParquetEncoding -> Maybe Int32 -> IO Column

Documentation

readParquet :: FilePath -> IO DataFrame Source #

Read a parquet file from path and load it into a dataframe.

Example

Expand

ghci> D.readParquet "./data/mtcars.parquet"

readMetadataFromPath :: FilePath -> IO FileMetadata Source #

readMetadataSizeFromFooter :: ByteString -> (Int, ByteString) Source #

getColumnPaths :: [SchemaElement] -> [(Text, Int)] Source #

processColumnPages :: (Int, Int) -> [Page] -> ParquetType -> ParquetEncoding -> Maybe Int32 -> IO Column Source #