script used to delete unwanted transactions

ext/scripts/remove-unwanted-transactions.sql

+--This script has been used to delete unwanted transactions for
+--https://redmine.cooperatic.fr/issues/4725
+
+--Several variables must be set :
+--@nb : nb of transactions that should be removed
+--@date_before : time just before the first transaction we want to remove (ok if includes other transaction as soon as amount is different ; ok to include the first transaction (the true one))
+--@date_after : time just after the last transaction we want to remove (ok if includes other transaction as soon as amount is different ; ok to include the first transaction (the true one))
+--@montant : positive
+--set first name, last name and raison
+--CAREFUL ! Variable not working in limit clause : https://stackoverflow.com/questions/245180/using-variable-in-a-limit-clause-in-mysql
+--setting limit manualy is therefore REQUIRED in the two first DELETE FROM requests
+
+--It is probably better to identify the flux that have to be deleted and to deduce the operations that have to be deleted as well
+--instead of doing so, we sort the operations (prestataire and adherent) by flux_id before performing a DELETE LIMIT in order
+--to be sure to delete the operations that are associated to the same flux.
+--then we remove the flux
+
+--the drawback of this technique is that it does not make sure that the FIRST flux is the one that is kept if it was in the time interval
+
+set @nb = 42;
+set @date_before = 'aaaa-mm-dd HH:MM:SS';
+set @date_after = 'aaaa-mm-dd HH:MM:SS';
+set @montant = 4242.42;
+
+select @account_adherent := account_adherent.id from user
+    inner join adherent on adherent.id = user.adherent_id
+    inner join account_adherent on account_adherent.adherent_id = user.adherent_id
+where user.firstname = 'Prénom' and user.lastname = 'Nom';
+select @account_prestataire := account_prestataire.id from prestataire
+    inner join account_prestataire on account_prestataire.prestataire_id = prestataire.id
+where prestataire.raison = 'Kumbi' and currency = 'emlc';
+
+DELETE FROM operation_adherent
+WHERE account_id = @account_adherent AND montant = -@montant AND created_at > @date_before AND created_at < @date_after
+    ORDER BY flux_id DESC LIMIT 0;
+
+UPDATE account_adherent SET balance = balance + @nb*@montant WHERE id = @account_adherent;
+
+DELETE FROM operation_prestataire
+WHERE account_id = @account_prestataire AND montant = @montant AND created_at > @date_before AND created_at < @date_after
+    ORDER BY flux_id DESC LIMIT 0;
+
+UPDATE account_prestataire SET balance = balance - @nb*@montant WHERE id = @account_prestataire;
+
+DELETE flux FROM flux LEFT JOIN operation_adherent oa ON oa.flux_id = flux.id WHERE oa.id IS NULL AND flux.type='adherent_prestataire';
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