Update readme.md

readme.md

@@ -98,3 +98,34 @@ JOIN
     document_details dd ON da.doc_id = dd.doc_id;
 ```
 
+## 3. Поиск зависимостей представлений
+
+```sql
+WITH RECURSIVE view_dependencies AS (
+    SELECT 
+        c.oid AS view_oid,
+        c.relname AS view_name,
+        n.nspname AS schema_name,
+        NULL::text AS depends_on
+    FROM pg_class c
+    JOIN pg_namespace n ON c.relnamespace = n.oid
+    WHERE c.relkind = 'v' -- только представления
+        AND n.nspname = 'public'
+        AND c.relname IN ('author_documents', 'document_details', 'latest_document_versions')
+    
+    UNION ALL
+
+    SELECT 
+        d.refobjid AS view_oid,
+        c.relname AS view_name,
+        n.nspname AS schema_name,
+        d.objid::regclass::text AS depends_on
+    FROM pg_depend d
+    JOIN pg_class c ON d.refobjid = c.oid
+    JOIN pg_namespace n ON c.relnamespace = n.oid
+    WHERE d.classid = 'pg_class'::regclass
+        AND d.refclassid = 'pg_class'::regclass
+        AND c.relkind = 'v'
+)
+SELECT * FROM view_dependencies;
+```