Update admin centroids

Author: Rub21

images/tiler-imposm/queries/ohm_mviews/admin_boundaries_centroids.sql

@@ -5,30 +5,44 @@
 --   ST_MaximumInscribedCircle from polygons in the input table.
 --
 -- Parameters:
---   input_table  TEXT - Source table name (e.g., osm_admin_areas_z0_2).
---   mview_name   TEXT - Name of the final materialized view to create.
+--   input_table   TEXT - Source table name (e.g., osm_admin_areas).
+--   mview_name    TEXT - Name of the final materialized view to create.
+--   unique_columns TEXT - Comma-separated list of columns for uniqueness
+--                        (default: 'id, osm_id, type').
+--   where_filter   TEXT - Optional WHERE filter condition to apply
+--                        (e.g., 'admin_level IN (1,2)').
 --
 -- Notes:
 --   - Excludes boundaries with role='label' from centroid calculation.
 --   - Area is stored in square kilometers as integer.
 --   - Geometry is indexed using GiST.
---   - Uniqueness is enforced on osm_id.
+--   - Uniqueness is enforced on the specified unique_columns.
 --   - Includes multilingual name columns via get_language_columns().
 --   - Uses finalize_materialized_view() for atomic creation and renaming.
 -- ============================================================================
 
 DROP FUNCTION IF EXISTS create_admin_boundaries_centroids_mview;
 CREATE OR REPLACE FUNCTION create_admin_boundaries_centroids_mview(
   input_table TEXT,
-  mview_name TEXT
+  mview_name TEXT,
+  unique_columns TEXT DEFAULT 'id, osm_id, type',
+  where_filter TEXT DEFAULT NULL
 )
 RETURNS void AS $$
 DECLARE
   tmp_mview_name TEXT := mview_name || '_tmp';
   sql_create TEXT;
   lang_columns TEXT := get_language_columns();
-  unique_columns TEXT := 'osm_id';
+  custom_filter TEXT;
 BEGIN
+  -- Build custom WHERE filter (if provided)
+  -- Note: custom_filter includes leading space and AND, so it can be concatenated directly
+  IF where_filter IS NOT NULL AND where_filter <> '' THEN
+    custom_filter := format(' AND (%s)', where_filter);
+  ELSE
+    custom_filter := '';
+  END IF;
+
   sql_create := format($sql$
     CREATE MATERIALIZED VIEW %I AS
     SELECT
@@ -48,8 +62,8 @@ BEGIN
     WHERE name IS NOT NULL AND name <> ''
       AND osm_id NOT IN (
         SELECT osm_id FROM osm_relation_members WHERE role = 'label'
-      );
-  $sql$, tmp_mview_name, lang_columns, input_table);
+      )%s;
+  $sql$, tmp_mview_name, lang_columns, input_table, custom_filter);
 
   -- Finalize the materialized view and its indexes
   PERFORM finalize_materialized_view(
@@ -64,10 +78,10 @@ $$ LANGUAGE plpgsql;
 -- ============================================================================
 -- Execute force creation of all admin boundaries centroids materialized views
 -- ============================================================================
-SELECT create_admin_boundaries_centroids_mview('osm_admin_areas_z0_2', 'mv_admin_boundaries_centroids_z0_2');
-SELECT create_admin_boundaries_centroids_mview('osm_admin_areas_z3_5', 'mv_admin_boundaries_centroids_z3_5');
-SELECT create_admin_boundaries_centroids_mview('osm_admin_areas_z6_7', 'mv_admin_boundaries_centroids_z6_7');
-SELECT create_admin_boundaries_centroids_mview('osm_admin_areas_z8_9', 'mv_admin_boundaries_centroids_z8_9');
-SELECT create_admin_boundaries_centroids_mview('osm_admin_areas_z10_12', 'mv_admin_boundaries_centroids_z10_12');
-SELECT create_admin_boundaries_centroids_mview('osm_admin_areas_z13_15', 'mv_admin_boundaries_centroids_z13_15');
-SELECT create_admin_boundaries_centroids_mview('osm_admin_areas_z16_20', 'mv_admin_boundaries_centroids_z16_20');
+SELECT create_admin_boundaries_centroids_mview('osm_admin_areas', 'mv_admin_boundaries_centroids_z0_2', 'id, osm_id, type', 'admin_level IN (1,2)');
+SELECT create_admin_boundaries_centroids_mview('osm_admin_areas', 'mv_admin_boundaries_centroids_z3_5', 'id, osm_id, type', 'admin_level IN (1,2,3,4)');
+SELECT create_admin_boundaries_centroids_mview('osm_admin_areas', 'mv_admin_boundaries_centroids_z6_7', 'id, osm_id, type', 'admin_level IN (1,2,3,4,5,6)');
+SELECT create_admin_boundaries_centroids_mview('osm_admin_areas', 'mv_admin_boundaries_centroids_z8_9', 'id, osm_id, type', 'admin_level IN (1,2,3,4,5,6,7,8,9)');
+SELECT create_admin_boundaries_centroids_mview('osm_admin_areas', 'mv_admin_boundaries_centroids_z10_12', 'id, osm_id, type', 'admin_level IN (1,2,3,4,5,6,7,8,9,10)');
+SELECT create_admin_boundaries_centroids_mview('osm_admin_areas', 'mv_admin_boundaries_centroids_z13_15', 'id, osm_id, type', 'admin_level IN (1,2,3,4,5,6,7,8,9,10,11)');
+SELECT create_admin_boundaries_centroids_mview('osm_admin_areas', 'mv_admin_boundaries_centroids_z16_20', 'id, osm_id, type', 'admin_level IN (1,2,3,4,5,6,7,8,9,10,11)');