From abbbad5844e3ac4fe9fb623e64c662c325e97e1c Mon Sep 17 00:00:00 2001
From: pashko <pm@pm.org.ru>
Date: Sun, 16 Feb 2025 18:50:38 +0800
Subject: [PATCH] Update readme.md

---
 readme.md | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)

diff --git a/readme.md b/readme.md
index ebb17f9..32b04cd 100644
--- a/readme.md
+++ b/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;
+```