diff --git a/common/unsafe/src/main/java/org/apache/spark/unsafe/types/CalendarInterval.java b/common/unsafe/src/main/java/org/apache/spark/unsafe/types/CalendarInterval.java
index 2a840c11304d..c04b0ea918bf 100644
--- a/common/unsafe/src/main/java/org/apache/spark/unsafe/types/CalendarInterval.java
+++ b/common/unsafe/src/main/java/org/apache/spark/unsafe/types/CalendarInterval.java
@@ -18,6 +18,7 @@
 package org.apache.spark.unsafe.types;
 
 import java.io.Serializable;
+import java.math.BigDecimal;
 import java.util.Objects;
 
 /**
@@ -87,10 +88,7 @@ public String toString() {
       appendUnit(sb, months % 12, "month");
     }
 
-    if (days != 0) {
-      appendUnit(sb, days / 7, "week");
-      appendUnit(sb, days % 7, "day");
-    }
+    appendUnit(sb, days, "day");
 
     if (microseconds != 0) {
       long rest = microseconds;
@@ -98,11 +96,10 @@ public String toString() {
       rest %= MICROS_PER_HOUR;
       appendUnit(sb, rest / MICROS_PER_MINUTE, "minute");
       rest %= MICROS_PER_MINUTE;
-      appendUnit(sb, rest / MICROS_PER_SECOND, "second");
-      rest %= MICROS_PER_SECOND;
-      appendUnit(sb, rest / MICROS_PER_MILLI, "millisecond");
-      rest %= MICROS_PER_MILLI;
-      appendUnit(sb, rest, "microsecond");
+      if (rest != 0) {
+        String s = BigDecimal.valueOf(rest, 6).stripTrailingZeros().toPlainString();
+        sb.append(' ').append(s).append(" seconds");
+      }
     } else if (months == 0 && days == 0) {
       sb.append(" 0 microseconds");
     }
diff --git a/common/unsafe/src/test/java/org/apache/spark/unsafe/types/CalendarIntervalSuite.java b/common/unsafe/src/test/java/org/apache/spark/unsafe/types/CalendarIntervalSuite.java
index c3ed57c79d56..fe4c1c1f5e36 100644
--- a/common/unsafe/src/test/java/org/apache/spark/unsafe/types/CalendarIntervalSuite.java
+++ b/common/unsafe/src/test/java/org/apache/spark/unsafe/types/CalendarIntervalSuite.java
@@ -57,19 +57,19 @@ public void toStringTest() {
     assertEquals("interval -2 years -10 months", i.toString());
 
     i = new CalendarInterval(0, 31, 0);
-    assertEquals("interval 4 weeks 3 days", i.toString());
+    assertEquals("interval 31 days", i.toString());
 
     i = new CalendarInterval(0, -31, 0);
-    assertEquals("interval -4 weeks -3 days", i.toString());
+    assertEquals("interval -31 days", i.toString());
 
     i = new CalendarInterval(0, 0, 3 * MICROS_PER_HOUR + 13 * MICROS_PER_MINUTE + 123);
-    assertEquals("interval 3 hours 13 minutes 123 microseconds", i.toString());
+    assertEquals("interval 3 hours 13 minutes 0.000123 seconds", i.toString());
 
     i = new CalendarInterval(0, 0, -3 * MICROS_PER_HOUR - 13 * MICROS_PER_MINUTE - 123);
-    assertEquals("interval -3 hours -13 minutes -123 microseconds", i.toString());
+    assertEquals("interval -3 hours -13 minutes -0.000123 seconds", i.toString());
 
     i = new CalendarInterval(34, 31, 3 * MICROS_PER_HOUR + 13 * MICROS_PER_MINUTE + 123);
-    assertEquals("interval 2 years 10 months 4 weeks 3 days 3 hours 13 minutes 123 microseconds",
+    assertEquals("interval 2 years 10 months 31 days 3 hours 13 minutes 0.000123 seconds",
       i.toString());
   }
 
diff --git a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala
index abeeab6dc7cf..42540036d89c 100644
--- a/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala
+++ b/sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/expressions/CastSuite.scala
@@ -669,7 +669,7 @@ abstract class CastSuiteBase extends SparkFunSuite with ExpressionEvalHelper {
     checkEvaluation(Cast(Literal.create(
       new CalendarInterval(15, 9, -3 * CalendarInterval.MICROS_PER_HOUR), CalendarIntervalType),
       StringType),
-      "interval 1 years 3 months 1 weeks 2 days -3 hours")
+      "interval 1 years 3 months 9 days -3 hours")
     checkEvaluation(Cast(Literal("INTERVAL 1 Second 1 microsecond"), CalendarIntervalType),
       new CalendarInterval(0, 0, 1000001))
     checkEvaluation(Cast(Literal("1 MONTH 1 Microsecond"), CalendarIntervalType),
diff --git a/sql/core/src/test/resources/sql-tests/inputs/literals.sql b/sql/core/src/test/resources/sql-tests/inputs/literals.sql
index 389b9cc53e02..c32509525c4d 100644
--- a/sql/core/src/test/resources/sql-tests/inputs/literals.sql
+++ b/sql/core/src/test/resources/sql-tests/inputs/literals.sql
@@ -84,7 +84,7 @@ select timestamp '2016-33-11 20:54:00.000';
 
 -- interval
 select interval 13.123456789 seconds, interval -13.123456789 second;
-select interval 1 year 2 month 3 week 4 day 5 hour 6 minute 7 seconds 8 millisecond, 9 microsecond;
+select interval 1 year 2 month 3 week 4 day 5 hour 6 minute 7 seconds 8 millisecond 9 microsecond;
 select interval '30' year '25' month '-100' day '40' hour '80' minute '299.889987299' second;
 select interval '0 0:0:0.1' day to second;
 select interval '10-9' year to month;
diff --git a/sql/core/src/test/resources/sql-tests/results/ansi/interval.sql.out b/sql/core/src/test/resources/sql-tests/results/ansi/interval.sql.out
index fcf6b6b10c8a..d0087bbcce55 100644
--- a/sql/core/src/test/resources/sql-tests/results/ansi/interval.sql.out
+++ b/sql/core/src/test/resources/sql-tests/results/ansi/interval.sql.out
@@ -61,9 +61,9 @@ select
   interval '13' second,
   interval '13.123456789' second
 -- !query 4 schema
-struct<interval 1 weeks 3 days 9 hours 8 minutes 7 seconds 987 milliseconds 654 microseconds:interval,interval 1 weeks 3 days:interval,interval 11 hours:interval,interval 12 minutes:interval,interval 13 seconds:interval,interval 13 seconds 123 milliseconds 456 microseconds:interval>
+struct<interval 10 days 9 hours 8 minutes 7.987654 seconds:interval,interval 10 days:interval,interval 11 hours:interval,interval 12 minutes:interval,interval 13 seconds:interval,interval 13.123456 seconds:interval>
 -- !query 4 output
-interval 1 weeks 3 days 9 hours 8 minutes 7 seconds 987 milliseconds 654 microseconds	interval 1 weeks 3 days	interval 11 hours	interval 12 minutes	interval 13 seconds	interval 13 seconds 123 milliseconds 456 microseconds
+interval 10 days 9 hours 8 minutes 7.987654 seconds	interval 10 days	interval 11 hours	interval 12 minutes	interval 13 seconds	interval 13.123456 seconds
 
 
 -- !query 5
@@ -75,25 +75,25 @@ select
   '13' second,
   '13.123456789' second
 -- !query 5 schema
-struct<interval 1 weeks 3 days 9 hours 8 minutes 7 seconds 987 milliseconds 654 microseconds:interval,interval 1 weeks 3 days:interval,interval 11 hours:interval,interval 12 minutes:interval,interval 13 seconds:interval,interval 13 seconds 123 milliseconds 456 microseconds:interval>
+struct<interval 10 days 9 hours 8 minutes 7.987654 seconds:interval,interval 10 days:interval,interval 11 hours:interval,interval 12 minutes:interval,interval 13 seconds:interval,interval 13.123456 seconds:interval>
 -- !query 5 output
-interval 1 weeks 3 days 9 hours 8 minutes 7 seconds 987 milliseconds 654 microseconds	interval 1 weeks 3 days	interval 11 hours	interval 12 minutes	interval 13 seconds	interval 13 seconds 123 milliseconds 456 microseconds
+interval 10 days 9 hours 8 minutes 7.987654 seconds	interval 10 days	interval 11 hours	interval 12 minutes	interval 13 seconds	interval 13.123456 seconds
 
 
 -- !query 6
 select map(1, interval 1 day, 2, interval 3 week)
 -- !query 6 schema
-struct<map(1, interval 1 days, 2, interval 3 weeks):map<int,interval>>
+struct<map(1, interval 1 days, 2, interval 21 days):map<int,interval>>
 -- !query 6 output
-{1:interval 1 days,2:interval 3 weeks}
+{1:interval 1 days,2:interval 21 days}
 
 
 -- !query 7
 select map(1, 1 day, 2, 3 week)
 -- !query 7 schema
-struct<map(1, interval 1 days, 2, interval 3 weeks):map<int,interval>>
+struct<map(1, interval 1 days, 2, interval 21 days):map<int,interval>>
 -- !query 7 output
-{1:interval 1 days,2:interval 3 weeks}
+{1:interval 1 days,2:interval 21 days}
 
 
 -- !query 8
@@ -204,7 +204,7 @@ select
   interval '99 11:22:33.123456789' day to second + dateval
 from interval_arithmetic
 -- !query 15 schema
-struct<dateval:date,CAST(CAST(dateval AS TIMESTAMP) - interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) - interval -14 weeks -1 days -11 hours -22 minutes -33 seconds -123 milliseconds -456 microseconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + interval -14 weeks -1 days -11 hours -22 minutes -33 seconds -123 milliseconds -456 microseconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + (- interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds) AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds AS DATE):date>
+struct<dateval:date,CAST(CAST(dateval AS TIMESTAMP) - interval 99 days 11 hours 22 minutes 33.123456 seconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) - interval -99 days -11 hours -22 minutes -33.123456 seconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + interval 99 days 11 hours 22 minutes 33.123456 seconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + interval -99 days -11 hours -22 minutes -33.123456 seconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + (- interval 99 days 11 hours 22 minutes 33.123456 seconds) AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + interval 99 days 11 hours 22 minutes 33.123456 seconds AS DATE):date>
 -- !query 15 output
 2012-01-01	2011-09-23	2012-04-09	2012-04-09	2011-09-23	2011-09-23	2012-04-09
 
@@ -220,7 +220,7 @@ select
   '99 11:22:33.123456789' day to second + dateval
 from interval_arithmetic
 -- !query 16 schema
-struct<dateval:date,CAST(CAST(dateval AS TIMESTAMP) - interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) - interval -14 weeks -1 days -11 hours -22 minutes -33 seconds -123 milliseconds -456 microseconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + interval -14 weeks -1 days -11 hours -22 minutes -33 seconds -123 milliseconds -456 microseconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + (- interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds) AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds AS DATE):date>
+struct<dateval:date,CAST(CAST(dateval AS TIMESTAMP) - interval 99 days 11 hours 22 minutes 33.123456 seconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) - interval -99 days -11 hours -22 minutes -33.123456 seconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + interval 99 days 11 hours 22 minutes 33.123456 seconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + interval -99 days -11 hours -22 minutes -33.123456 seconds AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + (- interval 99 days 11 hours 22 minutes 33.123456 seconds) AS DATE):date,CAST(CAST(dateval AS TIMESTAMP) + interval 99 days 11 hours 22 minutes 33.123456 seconds AS DATE):date>
 -- !query 16 output
 2012-01-01	2011-09-23	2012-04-09	2012-04-09	2011-09-23	2011-09-23	2012-04-09
 
@@ -236,7 +236,7 @@ select
   interval '99 11:22:33.123456789' day to second + tsval
 from interval_arithmetic
 -- !query 17 schema
-struct<tsval:timestamp,CAST(tsval - interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds AS TIMESTAMP):timestamp,CAST(tsval - interval -14 weeks -1 days -11 hours -22 minutes -33 seconds -123 milliseconds -456 microseconds AS TIMESTAMP):timestamp,CAST(tsval + interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds AS TIMESTAMP):timestamp,CAST(tsval + interval -14 weeks -1 days -11 hours -22 minutes -33 seconds -123 milliseconds -456 microseconds AS TIMESTAMP):timestamp,CAST(tsval + (- interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds) AS TIMESTAMP):timestamp,CAST(tsval + interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds AS TIMESTAMP):timestamp>
+struct<tsval:timestamp,CAST(tsval - interval 99 days 11 hours 22 minutes 33.123456 seconds AS TIMESTAMP):timestamp,CAST(tsval - interval -99 days -11 hours -22 minutes -33.123456 seconds AS TIMESTAMP):timestamp,CAST(tsval + interval 99 days 11 hours 22 minutes 33.123456 seconds AS TIMESTAMP):timestamp,CAST(tsval + interval -99 days -11 hours -22 minutes -33.123456 seconds AS TIMESTAMP):timestamp,CAST(tsval + (- interval 99 days 11 hours 22 minutes 33.123456 seconds) AS TIMESTAMP):timestamp,CAST(tsval + interval 99 days 11 hours 22 minutes 33.123456 seconds AS TIMESTAMP):timestamp>
 -- !query 17 output
 2012-01-01 00:00:00	2011-09-23 12:37:26.876544	2012-04-09 11:22:33.123456	2012-04-09 11:22:33.123456	2011-09-23 12:37:26.876544	2011-09-23 12:37:26.876544	2012-04-09 11:22:33.123456
 
@@ -252,7 +252,7 @@ select
   '99 11:22:33.123456789' day to second + tsval
 from interval_arithmetic
 -- !query 18 schema
-struct<tsval:timestamp,CAST(tsval - interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds AS TIMESTAMP):timestamp,CAST(tsval - interval -14 weeks -1 days -11 hours -22 minutes -33 seconds -123 milliseconds -456 microseconds AS TIMESTAMP):timestamp,CAST(tsval + interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds AS TIMESTAMP):timestamp,CAST(tsval + interval -14 weeks -1 days -11 hours -22 minutes -33 seconds -123 milliseconds -456 microseconds AS TIMESTAMP):timestamp,CAST(tsval + (- interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds) AS TIMESTAMP):timestamp,CAST(tsval + interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds AS TIMESTAMP):timestamp>
+struct<tsval:timestamp,CAST(tsval - interval 99 days 11 hours 22 minutes 33.123456 seconds AS TIMESTAMP):timestamp,CAST(tsval - interval -99 days -11 hours -22 minutes -33.123456 seconds AS TIMESTAMP):timestamp,CAST(tsval + interval 99 days 11 hours 22 minutes 33.123456 seconds AS TIMESTAMP):timestamp,CAST(tsval + interval -99 days -11 hours -22 minutes -33.123456 seconds AS TIMESTAMP):timestamp,CAST(tsval + (- interval 99 days 11 hours 22 minutes 33.123456 seconds) AS TIMESTAMP):timestamp,CAST(tsval + interval 99 days 11 hours 22 minutes 33.123456 seconds AS TIMESTAMP):timestamp>
 -- !query 18 output
 2012-01-01 00:00:00	2011-09-23 12:37:26.876544	2012-04-09 11:22:33.123456	2012-04-09 11:22:33.123456	2011-09-23 12:37:26.876544	2011-09-23 12:37:26.876544	2012-04-09 11:22:33.123456
 
@@ -263,9 +263,9 @@ select
   interval '99 11:22:33.123456789' day to second - interval '10 9:8:7.123456789' day to second
 from interval_arithmetic
 -- !query 19 schema
-struct<(interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds + interval 1 weeks 3 days 9 hours 8 minutes 7 seconds 123 milliseconds 456 microseconds):interval,(interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds - interval 1 weeks 3 days 9 hours 8 minutes 7 seconds 123 milliseconds 456 microseconds):interval>
+struct<(interval 99 days 11 hours 22 minutes 33.123456 seconds + interval 10 days 9 hours 8 minutes 7.123456 seconds):interval,(interval 99 days 11 hours 22 minutes 33.123456 seconds - interval 10 days 9 hours 8 minutes 7.123456 seconds):interval>
 -- !query 19 output
-interval 15 weeks 4 days 20 hours 30 minutes 40 seconds 246 milliseconds 912 microseconds	interval 12 weeks 5 days 2 hours 14 minutes 26 seconds
+interval 109 days 20 hours 30 minutes 40.246912 seconds	interval 89 days 2 hours 14 minutes 26 seconds
 
 
 -- !query 20
@@ -274,17 +274,17 @@ select
   '99 11:22:33.123456789' day to second - '10 9:8:7.123456789' day to second
 from interval_arithmetic
 -- !query 20 schema
-struct<(interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds + interval 1 weeks 3 days 9 hours 8 minutes 7 seconds 123 milliseconds 456 microseconds):interval,(interval 14 weeks 1 days 11 hours 22 minutes 33 seconds 123 milliseconds 456 microseconds - interval 1 weeks 3 days 9 hours 8 minutes 7 seconds 123 milliseconds 456 microseconds):interval>
+struct<(interval 99 days 11 hours 22 minutes 33.123456 seconds + interval 10 days 9 hours 8 minutes 7.123456 seconds):interval,(interval 99 days 11 hours 22 minutes 33.123456 seconds - interval 10 days 9 hours 8 minutes 7.123456 seconds):interval>
 -- !query 20 output
-interval 15 weeks 4 days 20 hours 30 minutes 40 seconds 246 milliseconds 912 microseconds	interval 12 weeks 5 days 2 hours 14 minutes 26 seconds
+interval 109 days 20 hours 30 minutes 40.246912 seconds	interval 89 days 2 hours 14 minutes 26 seconds
 
 
 -- !query 21
 select 30 day
 -- !query 21 schema
-struct<interval 4 weeks 2 days:interval>
+struct<interval 30 days:interval>
 -- !query 21 output
-interval 4 weeks 2 days
+interval 30 days
 
 
 -- !query 22
@@ -318,7 +318,7 @@ select 30 day day day
 -- !query 24
 select date '2012-01-01' - 30 day
 -- !query 24 schema
-struct<CAST(CAST(DATE '2012-01-01' AS TIMESTAMP) - interval 4 weeks 2 days AS DATE):date>
+struct<CAST(CAST(DATE '2012-01-01' AS TIMESTAMP) - interval 30 days AS DATE):date>
 -- !query 24 output
 2011-12-02
 
@@ -354,7 +354,7 @@ select date '2012-01-01' - 30 day day day
 -- !query 27
 select date '2012-01-01' + '-30' day
 -- !query 27 schema
-struct<CAST(CAST(DATE '2012-01-01' AS TIMESTAMP) + interval -4 weeks -2 days AS DATE):date>
+struct<CAST(CAST(DATE '2012-01-01' AS TIMESTAMP) + interval -30 days AS DATE):date>
 -- !query 27 output
 2011-12-02
 
@@ -362,7 +362,7 @@ struct<CAST(CAST(DATE '2012-01-01' AS TIMESTAMP) + interval -4 weeks -2 days AS
 -- !query 28
 select date '2012-01-01' + interval '-30' day
 -- !query 28 schema
-struct<CAST(CAST(DATE '2012-01-01' AS TIMESTAMP) + interval -4 weeks -2 days AS DATE):date>
+struct<CAST(CAST(DATE '2012-01-01' AS TIMESTAMP) + interval -30 days AS DATE):date>
 -- !query 28 output
 2011-12-02
 
diff --git a/sql/core/src/test/resources/sql-tests/results/datetime.sql.out b/sql/core/src/test/resources/sql-tests/results/datetime.sql.out
index 88a3d65a16e8..f85531196c20 100644
--- a/sql/core/src/test/resources/sql-tests/results/datetime.sql.out
+++ b/sql/core/src/test/resources/sql-tests/results/datetime.sql.out
@@ -136,7 +136,7 @@ select date'2020-01-01' - timestamp'2019-10-06 10:11:12.345678'
 -- !query 15 schema
 struct<subtracttimestamps(CAST(DATE '2020-01-01' AS TIMESTAMP), TIMESTAMP('2019-10-06 10:11:12.345678')):interval>
 -- !query 15 output
-interval 2078 hours 48 minutes 47 seconds 654 milliseconds 322 microseconds
+interval 2078 hours 48 minutes 47.654322 seconds
 
 
 -- !query 16
@@ -144,4 +144,4 @@ select timestamp'2019-10-06 10:11:12.345678' - date'2020-01-01'
 -- !query 16 schema
 struct<subtracttimestamps(TIMESTAMP('2019-10-06 10:11:12.345678'), CAST(DATE '2020-01-01' AS TIMESTAMP)):interval>
 -- !query 16 output
-interval -2078 hours -48 minutes -47 seconds -654 milliseconds -322 microseconds
+interval -2078 hours -48 minutes -47.654322 seconds
diff --git a/sql/core/src/test/resources/sql-tests/results/literals.sql.out b/sql/core/src/test/resources/sql-tests/results/literals.sql.out
index b7a0dcaa1ea0..ae1528cb52ac 100644
--- a/sql/core/src/test/resources/sql-tests/results/literals.sql.out
+++ b/sql/core/src/test/resources/sql-tests/results/literals.sql.out
@@ -323,33 +323,33 @@ select timestamp '2016-33-11 20:54:00.000'
 -- !query 34
 select interval 13.123456789 seconds, interval -13.123456789 second
 -- !query 34 schema
-struct<interval 13 seconds 123 milliseconds 456 microseconds:interval,interval -13 seconds -123 milliseconds -456 microseconds:interval>
+struct<interval 13.123456 seconds:interval,interval -13.123456 seconds:interval>
 -- !query 34 output
-interval 13 seconds 123 milliseconds 456 microseconds	interval -13 seconds -123 milliseconds -456 microseconds
+interval 13.123456 seconds	interval -13.123456 seconds
 
 
 -- !query 35
-select interval 1 year 2 month 3 week 4 day 5 hour 6 minute 7 seconds 8 millisecond, 9 microsecond
+select interval 1 year 2 month 3 week 4 day 5 hour 6 minute 7 seconds 8 millisecond 9 microsecond
 -- !query 35 schema
-struct<interval 1 years 2 months 3 weeks 4 days 5 hours 6 minutes 7 seconds 8 milliseconds:interval,microsecond:int>
+struct<interval 1 years 2 months 25 days 5 hours 6 minutes 7.008009 seconds:interval>
 -- !query 35 output
-interval 1 years 2 months 3 weeks 4 days 5 hours 6 minutes 7 seconds 8 milliseconds	9
+interval 1 years 2 months 25 days 5 hours 6 minutes 7.008009 seconds
 
 
 -- !query 36
 select interval '30' year '25' month '-100' day '40' hour '80' minute '299.889987299' second
 -- !query 36 schema
-struct<interval 32 years 1 months -14 weeks -2 days 41 hours 24 minutes 59 seconds 889 milliseconds 987 microseconds:interval>
+struct<interval 32 years 1 months -100 days 41 hours 24 minutes 59.889987 seconds:interval>
 -- !query 36 output
-interval 32 years 1 months -14 weeks -2 days 41 hours 24 minutes 59 seconds 889 milliseconds 987 microseconds
+interval 32 years 1 months -100 days 41 hours 24 minutes 59.889987 seconds
 
 
 -- !query 37
 select interval '0 0:0:0.1' day to second
 -- !query 37 schema
-struct<interval 100 milliseconds:interval>
+struct<interval 0.1 seconds:interval>
 -- !query 37 output
-interval 100 milliseconds
+interval 0.1 seconds
 
 
 -- !query 38
@@ -363,25 +363,25 @@ interval 10 years 9 months
 -- !query 39
 select interval '20 15:40:32.99899999' day to hour
 -- !query 39 schema
-struct<interval 2 weeks 6 days 15 hours:interval>
+struct<interval 20 days 15 hours:interval>
 -- !query 39 output
-interval 2 weeks 6 days 15 hours
+interval 20 days 15 hours
 
 
 -- !query 40
 select interval '20 15:40:32.99899999' day to minute
 -- !query 40 schema
-struct<interval 2 weeks 6 days 15 hours 40 minutes:interval>
+struct<interval 20 days 15 hours 40 minutes:interval>
 -- !query 40 output
-interval 2 weeks 6 days 15 hours 40 minutes
+interval 20 days 15 hours 40 minutes
 
 
 -- !query 41
 select interval '20 15:40:32.99899999' day to second
 -- !query 41 schema
-struct<interval 2 weeks 6 days 15 hours 40 minutes 32 seconds 998 milliseconds 999 microseconds:interval>
+struct<interval 20 days 15 hours 40 minutes 32.998999 seconds:interval>
 -- !query 41 output
-interval 2 weeks 6 days 15 hours 40 minutes 32 seconds 998 milliseconds 999 microseconds
+interval 20 days 15 hours 40 minutes 32.998999 seconds
 
 
 -- !query 42
@@ -395,9 +395,9 @@ interval 15 hours 40 minutes
 -- !query 43
 select interval '15:40.99899999' hour to second
 -- !query 43 schema
-struct<interval 15 minutes 40 seconds 998 milliseconds 999 microseconds:interval>
+struct<interval 15 minutes 40.998999 seconds:interval>
 -- !query 43 output
-interval 15 minutes 40 seconds 998 milliseconds 999 microseconds
+interval 15 minutes 40.998999 seconds
 
 
 -- !query 44
@@ -411,25 +411,25 @@ interval 15 hours 40 minutes
 -- !query 45
 select interval '15:40:32.99899999' hour to second
 -- !query 45 schema
-struct<interval 15 hours 40 minutes 32 seconds 998 milliseconds 999 microseconds:interval>
+struct<interval 15 hours 40 minutes 32.998999 seconds:interval>
 -- !query 45 output
-interval 15 hours 40 minutes 32 seconds 998 milliseconds 999 microseconds
+interval 15 hours 40 minutes 32.998999 seconds
 
 
 -- !query 46
 select interval '20 40:32.99899999' minute to second
 -- !query 46 schema
-struct<interval 2 weeks 6 days 40 minutes 32 seconds 998 milliseconds 999 microseconds:interval>
+struct<interval 20 days 40 minutes 32.998999 seconds:interval>
 -- !query 46 output
-interval 2 weeks 6 days 40 minutes 32 seconds 998 milliseconds 999 microseconds
+interval 20 days 40 minutes 32.998999 seconds
 
 
 -- !query 47
 select interval '40:32.99899999' minute to second
 -- !query 47 schema
-struct<interval 40 minutes 32 seconds 998 milliseconds 999 microseconds:interval>
+struct<interval 40 minutes 32.998999 seconds:interval>
 -- !query 47 output
-interval 40 minutes 32 seconds 998 milliseconds 999 microseconds
+interval 40 minutes 32.998999 seconds
 
 
 -- !query 48
@@ -523,9 +523,9 @@ struct<3.14:decimal(3,2),-3.14:decimal(3,2),3.14E+8:decimal(3,-6),3.14E-8:decima
 -- !query 56
 select map(1, interval 1 day, 2, interval 3 week)
 -- !query 56 schema
-struct<map(1, interval 1 days, 2, interval 3 weeks):map<int,interval>>
+struct<map(1, interval 1 days, 2, interval 21 days):map<int,interval>>
 -- !query 56 output
-{1:interval 1 days,2:interval 3 weeks}
+{1:interval 1 days,2:interval 21 days}
 
 
 -- !query 57
diff --git a/sql/core/src/test/resources/sql-tests/results/postgreSQL/interval.sql.out b/sql/core/src/test/resources/sql-tests/results/postgreSQL/interval.sql.out
index 31e0d65e9a51..bd4825003aa5 100644
--- a/sql/core/src/test/resources/sql-tests/results/postgreSQL/interval.sql.out
+++ b/sql/core/src/test/resources/sql-tests/results/postgreSQL/interval.sql.out
@@ -29,9 +29,9 @@ interval 999 hours
 -- !query 3
 SELECT interval '999' day
 -- !query 3 schema
-struct<interval 142 weeks 5 days:interval>
+struct<interval 999 days:interval>
 -- !query 3 output
-interval 142 weeks 5 days
+interval 999 days
 
 
 -- !query 4
diff --git a/sql/core/src/test/resources/sql-tests/results/udf/udf-window.sql.out b/sql/core/src/test/resources/sql-tests/results/udf/udf-window.sql.out
index 9354d5e3117f..a44e67dcd807 100644
--- a/sql/core/src/test/resources/sql-tests/results/udf/udf-window.sql.out
+++ b/sql/core/src/test/resources/sql-tests/results/udf/udf-window.sql.out
@@ -154,7 +154,7 @@ SELECT val_timestamp, udf(cate), avg(val_timestamp) OVER(PARTITION BY udf(cate)
 RANGE BETWEEN CURRENT ROW AND interval 23 days 4 hours FOLLOWING) FROM testData
 ORDER BY udf(cate), val_timestamp
 -- !query 9 schema
-struct<val_timestamp:timestamp,CAST(udf(cast(cate as string)) AS STRING):string,avg(CAST(val_timestamp AS DOUBLE)) OVER (PARTITION BY CAST(udf(cast(cate as string)) AS STRING) ORDER BY val_timestamp ASC NULLS FIRST RANGE BETWEEN CURRENT ROW AND interval 3 weeks 2 days 4 hours FOLLOWING):double>
+struct<val_timestamp:timestamp,CAST(udf(cast(cate as string)) AS STRING):string,avg(CAST(val_timestamp AS DOUBLE)) OVER (PARTITION BY CAST(udf(cast(cate as string)) AS STRING) ORDER BY val_timestamp ASC NULLS FIRST RANGE BETWEEN CURRENT ROW AND interval 23 days 4 hours FOLLOWING):double>
 -- !query 9 output
 NULL	NULL	NULL
 2017-07-31 17:00:00	NULL	1.5015456E9
diff --git a/sql/core/src/test/resources/sql-tests/results/window.sql.out b/sql/core/src/test/resources/sql-tests/results/window.sql.out
index 367dc4f51363..74036d078230 100644
--- a/sql/core/src/test/resources/sql-tests/results/window.sql.out
+++ b/sql/core/src/test/resources/sql-tests/results/window.sql.out
@@ -154,7 +154,7 @@ SELECT val_timestamp, cate, avg(val_timestamp) OVER(PARTITION BY cate ORDER BY v
 RANGE BETWEEN CURRENT ROW AND interval 23 days 4 hours FOLLOWING) FROM testData
 ORDER BY cate, val_timestamp
 -- !query 9 schema
-struct<val_timestamp:timestamp,cate:string,avg(CAST(val_timestamp AS DOUBLE)) OVER (PARTITION BY cate ORDER BY val_timestamp ASC NULLS FIRST RANGE BETWEEN CURRENT ROW AND interval 3 weeks 2 days 4 hours FOLLOWING):double>
+struct<val_timestamp:timestamp,cate:string,avg(CAST(val_timestamp AS DOUBLE)) OVER (PARTITION BY cate ORDER BY val_timestamp ASC NULLS FIRST RANGE BETWEEN CURRENT ROW AND interval 23 days 4 hours FOLLOWING):double>
 -- !query 9 output
 NULL	NULL	NULL
 2017-07-31 17:00:00	NULL	1.5015456E9