Update README.md

add more explanation about limitations
vidardb · Jul 10, 2020 · 1da8402 · 1da8402
1 parent 4be6ad9
commit 1da8402
Showing 1 changed file with 3 additions and 1 deletion.
diff --git a/README.md b/README.md
@@ -88,7 +88,9 @@ We test this foreign data wrapper on Ubuntu Server 18.04 using PostgreSQL-11 tog
 
 - The first attribute in the table definition must be the primary key.
 
-- Composite primary key is not supported for now.
+- Composite primary key can be achieved via creating a new data type `CREATE TYPE ... AS`.
+
+- Do not support secondary index.
 
 - ACID relies on the storage engine.