diff --git a/x-pack/plugin/sql/qa/server/src/main/resources/datetime.csv-spec b/x-pack/plugin/sql/qa/server/src/main/resources/datetime.csv-spec
index ec80d4669c0d4..3263dc8f7f747 100644
--- a/x-pack/plugin/sql/qa/server/src/main/resources/datetime.csv-spec
+++ b/x-pack/plugin/sql/qa/server/src/main/resources/datetime.csv-spec
@@ -153,6 +153,16 @@ SELECT WEEK(birth_date) week, birth_date FROM test_emp WHERE WEEK(birth_date) >
 2              |1953-01-07T00:00:00.000Z
 ;
 
+minuteOfDayFilterEquality
+SELECT MINUTE_OF_DAY(CONCAT(CONCAT('2021-01-22T14:26:06.', (salary % 2)::text), 'Z')::datetime) AS min_of_day 
+FROM test_emp WHERE min_of_day = 866 LIMIT 2;
+
+  min_of_day:i 
+---------------
+866            
+866            
+;
+
 selectAddWithDateTime
 schema::dt_year:s|dt_quarter:s|dt_month:s|dt_week:s|dt_day:s|dt_hours:s|dt_min:s|dt_sec:s|dt_millis:s|dt_mcsec:s|dt_nsec:s
 SELECT DATE_ADD('year', 10, '2019-09-04T11:22:33.123Z'::datetime)::string as dt_year, DATE_ADD('quarter', -10, '2019-09-04T11:22:33.123Z'::datetime)::string as dt_quarter, DATE_ADD('month', 20, '2019-09-04T11:22:33.123Z'::datetime)::string as dt_month,
diff --git a/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/expression/function/scalar/datetime/MinuteOfDay.java b/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/expression/function/scalar/datetime/MinuteOfDay.java
index a9fb385547bb0..ef83c5c0a2471 100644
--- a/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/expression/function/scalar/datetime/MinuteOfDay.java
+++ b/x-pack/plugin/sql/src/main/java/org/elasticsearch/xpack/sql/expression/function/scalar/datetime/MinuteOfDay.java
@@ -34,6 +34,6 @@ protected MinuteOfDay replaceChild(Expression newChild) {
 
     @Override
     public String dateTimeFormat() {
-        throw new UnsupportedOperationException("is there a format for it?");
+        return null;
     }
 }