Fix PR issues

Author: Kazantsev Maksim

datafusion/sqllogictest/test_files/spark/datetime/quarter.slt

@@ -50,6 +50,11 @@ SELECT quarter(NULL::date);
 ----
 NULL
 
+query I
+SELECT quarter(NULL::timestamp);
+----
+NULL
+
 query I
 SELECT quarter('2009-01-12 10:00:00'::timestamp);
 ----