diff --git a/function_mascara_cpf_lgpd.sql b/function_mascara_cpf_lgpd.sql
new file mode 100644
index 0000000..7e28a8b
--- /dev/null
+++ b/function_mascara_cpf_lgpd.sql
@@ -0,0 +1,27 @@
+-- drop function if exists public.mascara_cpf_lgpd(TEXT)
+CREATE OR REPLACE FUNCTION public.mascara_cpf_lgpd(in_cpf TEXT)
+RETURNS TEXT AS $$
+DECLARE
+    clean_cpf TEXT;
+    result TEXT;
+BEGIN
+
+    clean_cpf := regexp_replace(in_cpf, '[^0-9]', '', 'g');
+
+    IF char_length(clean_cpf) <> 11 THEN
+      RAISE EXCEPTION 'CPF inválido. Deve conter 11 dígitos.';
+    END IF;
+
+    result := substring(clean_cpf FROM 1 FOR 3) || '.XXX.XXX-' || substring(clean_cpf FROM 10 FOR 2);
+  
+    RETURN result;
+END;
+$$ LANGUAGE plpgsql;
+
+
+
+
+
+
+
+