Add db migrations & postgraphile

Author: u8sand

database/pdp/db/migrations/20241203203122_init.sql

@@ -0,0 +1,52 @@
+-- migrate:up
+create schema "pdp";
+create schema "api";
+
+create table "pdp"."entity" (
+  "type" varchar not null,
+  "id" uuid,
+  "attributes" jsonb not null,
+  "pagerank" float default 0,
+  primary key ("type", "id")
+) partition by list ("type");
+create index on "pdp"."entity" using gin (jsonb_to_tsvector('english', "attributes", '"all"'));
+create index on "pdp"."entity" ("pagerank");
+
+create view "api"."entity" as
+select * from "pdp"."entity";
+
+create table "pdp"."relationship" (
+  "source_type" varchar not null,
+  "source_id" uuid not null,
+  "predicate" varchar not null,
+  "target_type" varchar not null,
+  "target_id" uuid not null,
+  primary key ("predicate", "source_id", "target_id"),
+  foreign key ("source_type", "source_id") references "pdp"."entity" ("type", "id"),
+  foreign key ("target_type", "target_id") references "pdp"."entity" ("type", "id")
+) partition by list ("predicate");
+create index on "pdp"."relationship" ("source_type");
+create index on "pdp"."relationship" ("target_type");
+
+create view "api"."relationship" as
+select * from "pdp"."relationship";
+
+create or replace function "api"."search_entity"("search" varchar)
+returns setof "api"."entity" as $$
+  select *
+  from "pdp"."entity" "source"
+  where jsonb_to_tsvector('english', "source"."attributes", '"all"') @@ websearch_to_tsquery('english', "search");
+$$ language sql strict immutable parallel safe;
+
+create or replace function "api"."entity_relationships"(entity "api"."entity")
+returns setof "api"."entity" as $$
+  select "target".*
+  from "pdp"."relationship"
+  inner join "pdp"."entity" "target" on ("target"."type", "target"."id") = ("relationship"."target_type", "relationship"."target_id")
+  where (source_type, source_id) = (entity.type, entity.id);
+$$ language sql strict immutable parallel safe;
+comment on function "api"."entity_relationships" is E'@filterable';
+
+-- migrate:down
+drop schema "pdp" cascade;
+drop schema "api" cascade;