0021: constraints on currency columns in database: numbers only

brmbar3/schema/0021-constraints-on-numeric-columns.sql

@@ -0,0 +1,48 @@
+--
+-- 0021-constraints-on-numeric-columns.sql
+--
+-- #21 - stored function for adding constraints to numeric columns
+--
+-- ISC License
+--
+-- Copyright 2023-2025 Brmlab, z.s.
+-- TMA <tma+hs@jikos.cz>
+--
+-- Permission to use, copy, modify, and/or distribute this software
+-- for any purpose with or without fee is hereby granted, provided
+-- that the above copyright notice and this permission notice appear
+-- in all copies.
+--
+-- THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL
+-- WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED
+-- WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE
+-- AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR
+-- CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS
+-- OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+-- NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
+-- CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+--
+
+-- To require fully-qualified names
+SELECT pg_catalog.set_config('search_path', '', false);
+
+DO $upgrade_block$
+BEGIN
+
+IF brmbar_privileged.has_exact_schema_version(20) THEN
+
+ALTER TABLE public.transaction_splits ADD CONSTRAINT amount_check
+	CHECK (amount NOT IN ('Infinity'::numeric, '-Infinity'::numeric, 'NaN'::numeric));
+
+ALTER TABLE public.exchange_rates ADD CONSTRAINT rate_check
+	CHECK (rate NOT IN ('Infinity'::numeric, '-Infinity'::numeric, 'NaN'::numeric));
+
+
+PERFORM brmbar_privileged.upgrade_schema_version_to(21);
+END IF;
+
+END;
+$upgrade_block$;
+
+-- vim: set ft=plsql :
+