fix

regression-test/suites/query_p0/sql_functions/datetime_functions/test_date_function.groovy

@@ -818,4 +818,17 @@ suite("test_date_function") {
     qt_sql_varchar1 """ select dt, fmt, unix_timestamp(dt, fmt) as k1 from date_varchar order by k1,dt,fmt; """
     qt_sql_varchar1 """ select dt, unix_timestamp(dt, "%Y-%m-%d") as k1 from date_varchar order by k1,dt,fmt; """
     qt_sql_varchar1 """ select fmt, unix_timestamp("1990-12-12", fmt) as k1 from date_varchar order by k1,dt,fmt; """
+
+    def test_simplify = {
+        sql "drop table if exists test_int_date"
+        sql "create table test_int_date(dt int) distributed by hash(dt) properties('replication_num'='1');"
+        test {
+            sql "select months_add(dt, 1) = date '2024-02-29' from (select date '2024-01-31' as dt)a"
+            result([[true]])
+        }
+        test {
+            sql "select years_add(dt, 1) = date '2025-02-28' from (select date '2024-02-29' as dt)a"
+            result([[true]])
+        }
+    }()
 }