Currency : improve decimals

include/sql/patch/upgrade186.sql

@@ -0,0 +1,28 @@
+begin;
+
+-- more precision for currency conversion
+
+DROP VIEW public.v_currency_last_value;
+
+ALTER TABLE public.currency_history ALTER COLUMN ch_value TYPE numeric(20, 8) USING ch_value::numeric;
+
+
+CREATE OR REPLACE VIEW public.v_currency_last_value
+            AS WITH recent_rate AS (
+       SELECT currency_history.currency_id,
+           max(currency_history.ch_from) AS rc_from
+    FROM currency_history
+    GROUP BY currency_history.currency_id
+)
+SELECT cr1.id AS currency_id,
+     cr1.cr_name,
+     cr1.cr_code_iso,
+     ch1.id AS currency_history_id,
+     ch1.ch_value,
+     to_char(recent_rate.rc_from::timestamp with time zone, 'DD.MM.YYYY'::text) AS str_from
+FROM currency cr1
+    JOIN recent_rate ON recent_rate.currency_id = cr1.id
+    JOIN currency_history ch1 ON recent_rate.currency_id = ch1.currency_id AND recent_rate.rc_from = ch1.ch_from;
+
+insert into version (val,v_description) values (187,'Currency : more decimals');
+commit;