Enum parquet::record::reader::Reader

pub enum Reader {
    PrimitiveReader(TypePtr, Box<TripletIter>),
    OptionReader(i16, Box<Reader>),
    GroupReader(Option<TypePtr>, i16, Vec<Reader>),
    RepeatedReader(TypePtr, i16, i16, Box<Reader>),
    KeyValueReader(TypePtr, i16, i16, Box<Reader>, Box<Reader>),
}

Reader tree for record assembly

Variants

PrimitiveReader(TypePtr, Box<TripletIter>)

Primitive reader with type information and triplet iterator

OptionReader(i16, Box<Reader>)

Optional reader with definition level of a parent and a reader

GroupReader(Option<TypePtr>, i16, Vec<Reader>)

Group (struct) reader with type information, definition level and list of child readers. When it represents message type, type information is None

RepeatedReader(TypePtr, i16, i16, Box<Reader>)

Reader for repeated values, e.g. lists, contains type information, definition level, repetition level and a child reader

KeyValueReader(TypePtr, i16, i16, Box<Reader>, Box<Reader>)

Reader of key-value pairs, e.g. maps, contains type information, definition level, repetition level, child reader for keys and child reader for values

Trait Implementations

impl Display for Reader

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.