add additional table filters setting

docs/en/operations/settings/settings.md

@@ -6,6 +6,39 @@ slug: /en/operations/settings/settings
 
 # Settings
 
+## additional_table_filters
+
+An additional filter expression that is applied after reading
+from the specified table.
+
+Default value: 0.
+
+**Example**
+
+``` sql
+insert into table_1 values (1, 'a'), (2, 'bb'), (3, 'ccc'), (4, 'dddd');
+```
+```response
+┌─x─┬─y────┐
+│ 1 │ a    │
+│ 2 │ bb   │
+│ 3 │ ccc  │
+│ 4 │ dddd │
+└───┴──────┘
+```
+```sql
+SELECT *
+FROM table_1
+SETTINGS additional_table_filters = (('table_1', 'x != 2'))
+```
+```response
+┌─x─┬─y────┐
+│ 1 │ a    │
+│ 3 │ ccc  │
+│ 4 │ dddd │
+└───┴──────┘
+```
+
 ## allow_nondeterministic_mutations {#allow_nondeterministic_mutations}
 
 User-level setting that allows mutations on replicated tables to make use of non-deterministic functions such as `dictGet`.