A set of functions that can be useful to explore metadata

script/metadata-goodies.sql

@@ -0,0 +1,39 @@
+-- This is a set of functions not intended to be used in production
+-- but useful to explore the database without rails ORM.
+-- They are thought to be loosely coupled to the models and just rely on FK relations.
+--
+-- To install:
+--   \i metadata-goodies.psql
+-- To uninstall:
+--   DROP SCHEMA goodies CASCADE;
+
+
+CREATE SCHEMA IF NOT EXISTS goodies AUTHORIZATION postgres;
+
+CREATE OR REPLACE FUNCTION goodies.related_layer_ids(table_id uuid)
+RETURNS SETOF uuid  AS $$
+BEGIN
+  RETURN QUERY SELECT DISTINCT(layer_id) FROM layers_user_tables WHERE layers_user_tables.user_table_id = table_id;
+END;
+$$ LANGUAGE plpgsql;
+
+
+
+CREATE OR REPLACE FUNCTION goodies.related_map_ids(table_id uuid)
+RETURNS SETOF uuid  AS $$
+BEGIN
+  RETURN QUERY SELECT DISTINCT(map_id) FROM layers_maps WHERE layers_maps.layer_id
+    IN (SELECT goodies.related_layer_ids(table_id));
+
+END;
+$$ LANGUAGE plpgsql;
+
+
+-- E.g: SELECT id, name, type FROM goodies.related_vizs('6eb62d84-c4bc-446b-89dd-5435f6cc9346');
+CREATE OR REPLACE FUNCTION goodies.related_vizs(table_id uuid)
+RETURNS SETOF visualizations  AS $$
+BEGIN
+  RETURN QUERY SELECT * FROM visualizations WHERE visualizations.map_id
+    IN (SELECT goodies.related_map_ids(table_id));
+END;
+$$ LANGUAGE plpgsql;