Add example schema for #1582 (#1585)

issues/1582/schema.sql

@@ -0,0 +1,39 @@
+CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
+
+-- Table without any dependencies
+CREATE TABLE IF NOT EXISTS public.table_1 (
+  id uuid DEFAULT public.uuid_generate_v4() NOT NULL PRIMARY KEY
+);
+
+-- Table that depends on table_1
+CREATE TABLE IF NOT EXISTS public.table_2 (
+    id uuid DEFAULT public.uuid_generate_v4() NOT NULL,
+    table_1_id uuid NOT NULL REFERENCES public.table_1(id),
+    -- Add constraints / uniques here if needed. Will auto apply to all partitions.
+    PRIMARY KEY (id, table_1_id)
+)
+PARTITION BY HASH (table_1_id);
+
+-- Generate partition tables.
+-- No clue if this works on other SQL implementations than PostgreSQL.
+DO $$
+  DECLARE
+    counter integer := 0;
+  BEGIN
+    WHILE counter < 128
+    LOOP
+      EXECUTE('CREATE TABLE IF NOT EXISTS public.table_2_p_hash_p' || counter || ' PARTITION OF public.table_2 FOR VALUES WITH (MODULUS 128, REMAINDER ' || counter || ');');
+      counter := counter + 1;
+    END LOOP;
+END$$;
+
+-- Table that depends on table_1 and table_2.
+-- Foreign keys to table_2 are through the partitions
+CREATE TABLE IF NOT EXISTS public.table_3 (
+    id uuid DEFAULT public.uuid_generate_v4() NOT NULL PRIMARY KEY,
+    -- FK to table_1 only needed so that we can FK to table_2
+    table_1_id uuid REFERENCES public.table_1(id) NOT NULL,
+    table_2_id uuid NOT NULL,
+    FOREIGN KEY (table_2_id, table_1_id) REFERENCES public.table_2(id, table_1_id)
+);
+