PG-1257 Add key deletion funcs to documentation

Add principal key deletion functions to documentation. Fix couple uncertainties on architecture docs page.
percona · dutow · Jul 3, 2025 · Jun 16, 2025 · Jun 18, 2025 · Jun 18, 2025
commit 5a2c081a959a5a763ceb02b2e2acc395078266e3
@@ -305,12 +305,12 @@ You can manage a default key with the following functions:
 * `pg_tde_delete_default_key()`
 
 !!! note
-    `pg_tde_delete_default_key()` is only possible if there's no table currently using the default principal key.
+    `pg_tde_delete_default_key()` is only possible if there's no database currently using the default principal key.
     Changing the default principal key will rotate the encryption of internal keys for all databases using the current default principal key.
 
 #### Delete a key
 
-The `pg_tde_delete_key()` function removes the principal key for the current database. If the current database has any encrypted tables, and there isn’t a default principal key configured, it reports an error instead. If there are encrypted tables, but there’s also a global default principal key, internal keys will be encrypted with the default key.
+The `pg_tde_delete_key()` function removes the principal key for the current database. If the current database has any encrypted tables, and there isn’t a default principal key configured, it reports an error instead. If there are encrypted tables, but there’s also a default principal key, internal keys will be encrypted with the default key.
 
 !!! note
     WAL keys **cannot** be deleted, as server keys are managed separately.

@@ -302,6 +302,22 @@ SELECT pg_tde_set_default_key_using_global_key_provider(
 );
 ```
 
+### pg_tde_delete_key
+
+Deletes the principal key for the current database. If the current database has any encrypted tables, and there isn’t a default principal key configured, it reports an error instead. If there are encrypted tables, but there’s also a default principal key, internal keys will be encrypted with the default key.
+
+```sql
+SELECT pg_tde_delete_key();
+```
+
+### pg_tde_delete_default_key
+
+Deletes default principal key. It's possible only if no database uses default principal key.
+
+```sql
+SELECT pg_tde_delete_default_key();
+```
+
 ## Encryption status check
 
 ### pg_tde_is_encrypted