Try new operation table

script/sql/api/1.title.sql

@@ -0,0 +1,37 @@
+drop function if exists get_title;
+
+create function get_title() returns text as
+$$
+select value from title as result;
+$$
+language sql;
+
+
+drop function if exists set_title;
+
+create function set_title(new_value text) returns json as
+$$
+declare
+    old_value text;
+
+    redo_sql text;
+    undo_sql text;
+    redo_cs json;
+    undo_cs json;
+
+begin
+    select value into old_value from title;
+
+    redo_sql = format('update title set value = ''%s''', new_value);
+    undo_sql = format('update title set value = ''%s''', old_value);
+    redo_cs = format('{"operation": "update", "type": "title", "value": "%s" }', new_value)::json;
+    undo_cs = format('{"operation": "update", "type": "title", "value": "%s" }', old_value)::json;
+    execute add_operation(redo_sql, undo_sql, redo_cs, undo_cs);
+
+    execute redo_sql;
+
+    return redo_cs;
+    
+end;
+$$
+language plpgsql;