orphan removal helper script

This should actually be part of the import app functionality.
Save for future reference.

Author: jannebe

scripts/orphan-removal.sh

@@ -0,0 +1,6 @@
+#!/usr/bin/env bash
+
+set -eu
+
+SCRIPT_DIR="$(dirname "$(realpath "$0")")"
+psql -h localhost -p 6432 -d jore4e2e -U dbadmin -f "$SCRIPT_DIR/orphan-removal.sql"

scripts/orphan-removal.sql

@@ -0,0 +1,27 @@
+DELETE FROM journey_pattern.journey_pattern jp
+WHERE NOT EXISTS (
+    SELECT 1
+    FROM journey_pattern.scheduled_stop_point_in_journey_pattern
+    WHERE journey_pattern_id = jp.journey_pattern_id
+);
+
+DELETE FROM route.route r
+WHERE NOT EXISTS (
+    SELECT 1
+    FROM route.infrastructure_link_along_route
+    WHERE route_id = r.route_id
+);
+
+DELETE FROM route.route r
+WHERE NOT EXISTS (
+    SELECT 1
+    FROM journey_pattern.journey_pattern
+    WHERE on_route_id = r.route_id
+);
+
+DELETE FROM route.line l
+WHERE NOT EXISTS (
+    SELECT 1
+    FROM route.route
+    WHERE on_line_id = l.line_id
+);