From e2a13c248c46244e90d8e1c88e00ba91aa98b9e0 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Martin=20=C5=BDdila?= <m.zdila@gmail.com>
Date: Wed, 24 Jul 2024 20:53:00 +0200
Subject: [PATCH] added triggers to update generalized routes which for some
 reason beak during the time

---
 sql/additional.sql           | 105 +++++++++++++++++++++++++++++++++++
 sql/route_gen_workaround.sql |  43 ++++++++++++++
 2 files changed, 148 insertions(+)
 create mode 100644 sql/route_gen_workaround.sql

diff --git a/sql/additional.sql b/sql/additional.sql
index 0f4fc08..9f29945 100644
--- a/sql/additional.sql
+++ b/sql/additional.sql
@@ -25,6 +25,111 @@ CREATE INDEX osm_route_members_idx1 ON osm_route_members (member);
 
 CREATE INDEX osm_route_members_idx2 ON osm_route_members (type);
 
+create index osm_route_members_idx1_g1 on osm_route_members_gen1(member);
+
+create index osm_route_members_idx2_g1 on osm_route_members_gen1(type);
+
+create index osm_route_members_idx1_g0 on osm_route_members_gen0(member);
+
+create index osm_route_members_idx2_g0 on osm_route_members_gen0(type);
+
+-- There seems to be a bug in imposm3. Workaround by using a trigger.
+-- https://github.com/omniscale/imposm3/issues/293
+
+CREATE OR REPLACE FUNCTION osm_route_members_insert_trigger()
+RETURNS TRIGGER AS $$
+BEGIN
+    INSERT INTO osm_route_members_gen1 (osm_id, member, role, type, geometry)
+    VALUES (NEW.osm_id, NEW.member, NEW.role, NEW.type, ST_SimplifyPreserveTopology(NEW.geometry, 50));
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION osm_route_members_update_trigger()
+RETURNS TRIGGER AS $$
+BEGIN
+    UPDATE osm_route_members_gen1
+    SET member = NEW.member,
+        role = NEW.role,
+        type = NEW.type,
+        geometry = ST_SimplifyPreserveTopology(NEW.geometry, 50)
+    WHERE osm_id = NEW.osm_id AND type = NEW.type;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+
+CREATE OR REPLACE FUNCTION osm_route_members_delete_trigger()
+RETURNS TRIGGER AS $$
+BEGIN
+    DELETE FROM osm_route_members_gen1
+    WHERE osm_id = OLD.osm_id AND type = OLD.type;
+    RETURN OLD;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE TRIGGER osm_route_members_after_insert
+AFTER INSERT ON osm_route_members
+FOR EACH ROW
+EXECUTE FUNCTION osm_route_members_insert_trigger();
+
+CREATE TRIGGER osm_route_members_after_update
+AFTER UPDATE ON osm_route_members
+FOR EACH ROW
+EXECUTE FUNCTION osm_route_members_update_trigger();
+
+CREATE TRIGGER osm_route_members_after_delete
+AFTER DELETE ON osm_route_members
+FOR EACH ROW
+EXECUTE FUNCTION osm_route_members_delete_trigger();
+
+
+CREATE OR REPLACE FUNCTION osm_route_members_gen0_insert_trigger()
+RETURNS TRIGGER AS $$
+BEGIN
+    INSERT INTO osm_route_members_gen0 (osm_id, member, role, type, geometry)
+    VALUES (NEW.osm_id, NEW.member, NEW.role, NEW.type, ST_SimplifyPreserveTopology(NEW.geometry, 200));
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION osm_route_members_gen0_update_trigger()
+RETURNS TRIGGER AS $$
+BEGIN
+    UPDATE osm_route_members_gen0
+    SET member = NEW.member,
+        role = NEW.role,
+        type = NEW.type,
+        geometry = ST_SimplifyPreserveTopology(NEW.geometry, 200)
+    WHERE osm_id = NEW.osm_id AND type = NEW.type;
+    RETURN NEW;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE OR REPLACE FUNCTION osm_route_members_gen0_delete_trigger()
+RETURNS TRIGGER AS $$
+BEGIN
+    DELETE FROM osm_route_members_gen0
+    WHERE osm_id = OLD.osm_id AND type = OLD.type;
+    RETURN OLD;
+END;
+$$ LANGUAGE plpgsql;
+
+CREATE TRIGGER osm_route_members_gen0_after_insert
+AFTER INSERT ON osm_route_members
+FOR EACH ROW
+EXECUTE FUNCTION osm_route_members_gen0_insert_trigger();
+
+CREATE TRIGGER osm_route_members_gen0_after_update
+AFTER UPDATE ON osm_route_members
+FOR EACH ROW
+EXECUTE FUNCTION osm_route_members_gen0_update_trigger();
+
+CREATE TRIGGER osm_route_members_gen0_after_delete
+AFTER DELETE ON osm_route_members
+FOR EACH ROW
+EXECUTE FUNCTION osm_route_members_gen0_delete_trigger();
+
 -- z-order
 --
 DROP TABLE IF EXISTS z_order_poi;
diff --git a/sql/route_gen_workaround.sql b/sql/route_gen_workaround.sql
new file mode 100644
index 0000000..7f34f36
--- /dev/null
+++ b/sql/route_gen_workaround.sql
@@ -0,0 +1,43 @@
+-- There seems to be a bug in imposm3. Simple workaround is to run this regulary, but for better one create a trigger.
+-- https://github.com/omniscale/imposm3/issues/293
+INSERT INTO
+  osm_route_members_gen1 (osm_id, member, role, type, geometry)
+SELECT
+  osm.osm_id,
+  osm.member,
+  osm.role,
+  osm.type,
+  ST_SimplifyPreserveTopology(osm.geometry, 50) AS geometry
+FROM
+  osm_route_members osm
+WHERE
+  NOT EXISTS (
+    SELECT
+      1
+    FROM
+      osm_route_members_gen1 osm_gen1
+    WHERE
+      osm_gen1.osm_id = osm.osm_id
+      AND osm_gen1.type = osm.type
+  );
+
+INSERT INTO
+  osm_route_members_gen0 (osm_id, member, role, type, geometry)
+SELECT
+  osm.osm_id,
+  osm.member,
+  osm.role,
+  osm.type,
+  ST_SimplifyPreserveTopology(osm.geometry, 200) AS geometry
+FROM
+  osm_route_members osm
+WHERE
+  NOT EXISTS (
+    SELECT
+      1
+    FROM
+      osm_route_members_gen0 osm_gen0
+    WHERE
+      osm_gen0.osm_id = osm.osm_id
+      AND osm_gen0.type = osm.type
+  );