Group by name_en for important waterway

layers/waterway/merge_waterway.sql

@@ -14,21 +14,21 @@ DROP MATERIALIZED VIEW IF EXISTS osm_important_waterway_linestring_gen3 CASCADE;
 CREATE MATERIALIZED VIEW osm_important_waterway_linestring AS (
     SELECT
         (ST_Dump(geometry)).geom AS geometry,
-        name
+        name, name_en
     FROM (
         SELECT
             ST_LineMerge(ST_Union(geometry)) AS geometry,
-            name
+            name, COALESCE(NULLIF(name_en, ''), name) AS name_en
         FROM osm_waterway_linestring
         WHERE name <> '' AND waterway = 'river'
-        GROUP BY name
+        GROUP BY name, name_en
     ) AS waterway_union
 );
 CREATE INDEX IF NOT EXISTS osm_important_waterway_linestring_geometry_idx ON osm_important_waterway_linestring USING gist(geometry);
 
 -- etldoc: osm_important_waterway_linestring -> osm_important_waterway_linestring_gen1
 CREATE MATERIALIZED VIEW osm_important_waterway_linestring_gen1 AS (
-    SELECT ST_Simplify(geometry, 60) AS geometry, name
+    SELECT ST_Simplify(geometry, 60) AS geometry, name, name_en
     FROM osm_important_waterway_linestring
     WHERE ST_Length(geometry) > 1000
 );
@@ -36,7 +36,7 @@ CREATE INDEX IF NOT EXISTS osm_important_waterway_linestring_gen1_geometry_idx O
 
 -- etldoc: osm_important_waterway_linestring_gen1 -> osm_important_waterway_linestring_gen2
 CREATE MATERIALIZED VIEW osm_important_waterway_linestring_gen2 AS (
-    SELECT ST_Simplify(geometry, 100) AS geometry, name
+    SELECT ST_Simplify(geometry, 100) AS geometry, name, name_en
     FROM osm_important_waterway_linestring_gen1
     WHERE ST_Length(geometry) > 4000
 );
@@ -44,7 +44,7 @@ CREATE INDEX IF NOT EXISTS osm_important_waterway_linestring_gen2_geometry_idx O
 
 -- etldoc: osm_important_waterway_linestring_gen2 -> osm_important_waterway_linestring_gen3
 CREATE MATERIALIZED VIEW osm_important_waterway_linestring_gen3 AS (
-    SELECT ST_Simplify(geometry, 200) AS geometry, name
+    SELECT ST_Simplify(geometry, 200) AS geometry, name, name_en
     FROM osm_important_waterway_linestring_gen2
     WHERE ST_Length(geometry) > 8000
 );
@@ -59,7 +59,7 @@ CREATE OR REPLACE FUNCTION waterway.flag() RETURNS trigger AS $$
 BEGIN
     INSERT INTO waterway.updates(t) VALUES ('y')  ON CONFLICT(t) DO NOTHING;
     RETURN null;
-END;    
+END;
 $$ language plpgsql;
 
 CREATE OR REPLACE FUNCTION waterway.refresh() RETURNS trigger AS