io.eels.component.parquet

RowParquetReaderFn

object RowParquetReaderFn extends Logging

Helper function to create a native parquet reader for Row objects, using the apache parquet library. The reader supports optional predicate (for row filtering) and a projection schema (for column filtering).

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  6. def apply(path: Path, predicate: Option[Predicate], readSchema: Option[Type], dictionaryFiltering: Boolean)(implicit conf: Configuration): ParquetReader[Row]

    Creates a new reader for the given path.

    Creates a new reader for the given path.

    predicate

    if set then a parquet predicate is applied to the rows

    readSchema

    optional schema used as a projection in the native parquet reader

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  19. def schema(path: Path)(implicit conf: Configuration): StructType

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