variant_to_unscaled_decimal

parquet_variant_compute::type_conversion

Function variant_to_unscaled_decimal 

Source 
pub(crate) fn variant_to_unscaled_decimal<O>(
    variant: &Variant<'_, '_>,
    precision: u8,
    scale: i8,
) -> Option<O::Native>
where
    O: DecimalType,
    O::Native: DecimalCast,
Expand description

Returns the unscaled integer representation for Arrow decimal type O from a Variant.

  • precision and scale specify the target Arrow decimal parameters
  • Integer variants (Int8/16/32/64) are treated as decimals with scale 0
  • Decimal variants (Decimal4/8/16) use their embedded precision and scale

The value is rescaled to (precision, scale) using rescale_decimal and returns None if it cannot fit the requested precision.