Module mz_repr::adt::numeric

Functions related to Materialize’s numeric type, which is largely a wrapper around rust-dec.

Modules

• str_serde
  Module to simplify serde’ing a Numeric through its string representation.

Structs

• InvalidNumericMaxScaleError
  The error returned when constructing a NumericMaxScale from an invalid value.
• NumericMaxScale
  The max_scale of a ScalarType::Numeric.
• PackedNumeric
  An encoded packed variant of Numeric.
• ProtoNumericMaxScale
• ProtoOptionalNumericMaxScale
  Helper struct for representing Option<NumericMaxScale>.

Constants

• NUMERIC_AGG_MAX_PRECISION
  The maximum number of digits expressable in a NumericAgg value.
• NUMERIC_AGG_WIDTH
  The number of internal decimal units in a NumericAgg value.
• NUMERIC_AGG_WIDTH_USIZE
  The value of NUMERIC_AGG_WIDTH as a u8.
• NUMERIC_DATUM_MAX_PRECISION
  The maximum number of digits expressable in a Numeric value.
• NUMERIC_DATUM_WIDTH
  The number of internal decimal units in a Numeric value.
• NUMERIC_DATUM_WIDTH_USIZE
  The value of NUMERIC_DATUM_WIDTH as a u8.

Statics

• CX_AGG 🔒
• CX_DATUM 🔒
• U128_SPLITTER_AGG 🔒
• U128_SPLITTER_DATUM 🔒

Traits

• Dec
  Traits to generalize converting Decimal values to and from their coefficients’ two’s complements.
• DecimalLike
  A type that can represent Real Numbers. Useful for interoperability between Numeric and floating point.

Functions

• cx_agg
  Returns a new context appropriate for operating on numeric aggregates.
• cx_datum
  Returns a new context appropriate for operating on numeric datums.
• get_precision
  Returns n’s precision, i.e. the total number of digits represented by n in standard notation not including a zero in the “one’s place” in (-1,1).
• get_scale
  Returns n’s scale, i.e. the number of digits used after the decimal point.
• munge_numeric
  Ensures Numeric values are:
• negate_twos_complement_le 🔒
  Using negative binary numbers can require more digits of precision than Numeric offers, so we need to have the option to swap bytes’ signs at the byte- rather than the library-level.
• numeric_to_twos_complement_be
  Converts an Numeric into its big endian two’s complement representation.
• numeric_to_twos_complement_inner 🔒
• numeric_to_twos_complement_wide
  Converts an Numeric into a big endian two’s complement representation where the encoded value has NUMERIC_AGG_MAX_PRECISION digits and a scale of NUMERIC_DATUM_MAX_PRECISION.
• rescale
  Rescale n as an OrderedDecimal with the described scale, or error if:
• rescale_within_max_precision 🔒
  Rescale’s n to fit within Numeric’s max precision or error if not possible.
• twos_complement_be_to_numeric
• twos_complement_be_to_numeric_inner
  Parses a buffer of two’s complement digits in big-endian order and converts them to Decimal<N>.
• twos_complement_be_to_u128 🔒

Type Aliases

• Numeric
  A numeric value.
• NumericAgg
  A double-width version of Numeric for use in aggregations.