Christoph Berg [email protected]

postgresql-numeral provides numeric data types for PostgreSQL that use numerals (words instead of digits) for input and output.

Data types:

• numeral: English numerals (one, two, three, four, ...), short scale (10⁹ = billion)
• zahl: German numerals (eins, zwei, drei, vier, ...), long scale (10⁹ = Milliarde)
• roman: Roman numerals (I, II, III, IV, ...)

Requires PostgreSQL >= 9.4 (currently up to 13) and Bison 3.

# SELECT 'thirty'::numeral + 'twelve'::numeral as sum;
    sum
───────────
 forty-two

# SELECT 'siebzehn'::zahl * 'dreiundzwanzig' AS "Produkt";
         Produkt
──────────────────────────
 dreihunderteinundneunzig

# SELECT 'MCMLV'::roman + 'II'::roman * 'XXX' AS futurum;
 futurum
─────────
 MMXV

The data types are internally binary compatible to bigint. Casts to and from bigint are defined (to bigint as implicit). The module does not implement any operators but instead reuses the existing bigint operators. Effectively, the data types behave like bigint, just with different input/output functions.

Copyright (C) 2017, 2020 Christoph Berg

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.