parquet::arrow::record_reader::definition_levels

Enum BufferInner

Source 
enum BufferInner {
    Full {
        levels: Vec<i16>,
        nulls: BooleanBufferBuilder,
        max_level: i16,
    },
    Mask {
        nulls: BooleanBufferBuilder,
    },
}

Variants§

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Full

Compute levels and null mask

Fields

§levels: Vec<i16>
§nulls: BooleanBufferBuilder
§max_level: i16
§

Mask

Only compute null bitmask - requires max level to be 1

This is an optimisation for the common case of a nullable scalar column, as decoding the definition level data is only required when decoding nested structures

Fields

§nulls: BooleanBufferBuilder

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