Update README.md about materialized view support for postgresql

pankona · web-flow · commit 7787c3bff519 · 2023-09-28T10:39:22.000+09:00
diff --git a/README.md b/README.md
@@ -138,6 +138,7 @@ Table of Contents
 
 - Multi-column foreign key support
 - Materialized view support
+  - Only postgresql is supported
 
 ### Supported Databases
 
