Initial commit.

modoboa_installer/scripts/files/dovecot/install_modoboa_postgres_trigger.sql

@@ -0,0 +1,37 @@
+CREATE OR REPLACE FUNCTION merge_quota() RETURNS TRIGGER AS $$
+BEGIN
+  IF NEW.messages < 0 OR NEW.messages IS NULL THEN
+    -- ugly kludge: we came here from this function, really do try to insert
+    IF NEW.messages IS NULL THEN
+      NEW.messages = 0;
+    ELSE
+      NEW.messages = -NEW.messages;
+    END IF;
+    return NEW;
+  END IF;
+
+  LOOP
+    UPDATE admin_quota SET bytes = bytes + NEW.bytes,
+      messages = messages + NEW.messages
+      WHERE username = NEW.username;
+    IF found THEN
+      RETURN NULL;
+    END IF;
+
+    BEGIN
+      IF NEW.messages = 0 THEN
+        RETURN NEW;
+      ELSE
+        NEW.messages = - NEW.messages;
+        return NEW;
+      END IF;
+    EXCEPTION WHEN unique_violation THEN
+      -- someone just inserted the record, update it
+    END;
+  END LOOP;
+END;
+$$ LANGUAGE plpgsql;
+
+DROP TRIGGER IF EXISTS mergequota ON admin_quota;
+CREATE TRIGGER mergequota BEFORE INSERT ON admin_quota
+   FOR EACH ROW EXECUTE PROCEDURE merge_quota();