nrc commented on code in PR #12514:
URL: https://github.com/apache/datafusion/pull/12514#discussion_r1767512124
##########
datafusion/sqllogictest/test_files/expr.slt:
##########
@@ -1472,6 +1472,135 @@ SELECT extract(epoch from arrow_cast('1969-12-31',
'Date64'))
----
-86400
+# test_extract_interval
+
+query R
+SELECT extract(year from arrow_cast('10 years', 'Interval(YearMonth)'))
+----
+10
+
+query R
+SELECT extract(month from arrow_cast('10 years', 'Interval(YearMonth)'))
+----
+0
+
+query R
+SELECT extract(year from arrow_cast('10 months', 'Interval(YearMonth)'))
+----
+0
+
+query R
+SELECT extract(month from arrow_cast('10 months', 'Interval(YearMonth)'))
+----
+10
+
+query R
+SELECT extract(year from arrow_cast('20 months', 'Interval(YearMonth)'))
+----
+1
+
+query R
+SELECT extract(month from arrow_cast('20 months', 'Interval(YearMonth)'))
+----
+8
+
+query error DataFusion error: Arrow error: Compute error: Year does not
support: Interval\(DayTime\)
+SELECT extract(year from arrow_cast('10 days', 'Interval(DayTime)'))
+
+query error DataFusion error: Arrow error: Compute error: Month does not
support: Interval\(DayTime\)
+SELECT extract(month from arrow_cast('10 days', 'Interval(DayTime)'))
+
+query R
+SELECT extract(day from arrow_cast('10 days', 'Interval(DayTime)'))
+----
+10
+
+query R
+SELECT extract(day from arrow_cast('14400 minutes', 'Interval(DayTime)'))
+----
+0
+
+query R
+SELECT extract(minute from arrow_cast('14400 minutes', 'Interval(DayTime)'))
+----
+14400
+
+query R
+SELECT extract(second from arrow_cast('5.1 seconds', 'Interval(DayTime)'))
+----
+5
+
+query R
+SELECT extract(second from arrow_cast('14400 minutes', 'Interval(DayTime)'))
+----
+864000
+
+query R
+SELECT extract(second from arrow_cast('2 months', 'Interval(MonthDayNano)'))
+----
+0
+
+query R
+SELECT extract(second from arrow_cast('2 days', 'Interval(MonthDayNano)'))
+----
+0
+
+query R
+SELECT extract(second from arrow_cast('2 seconds', 'Interval(MonthDayNano)'))
+----
+2
+
+query R
+SELECT extract(milliseconds from arrow_cast('2 seconds',
'Interval(MonthDayNano)'))
+----
+2000
+
+query R
+SELECT extract(second from arrow_cast('2030 milliseconds',
'Interval(MonthDayNano)'))
+----
+2.03
+
+# test_extract_duration
+
+query R
+SELECT extract(second from arrow_cast(2, 'Duration(Second)'))
+----
+2
+
+query R
+SELECT extract(millisecond from arrow_cast(2, 'Duration(Second)'))
+----
+2000
+
+query R
+SELECT extract(second from arrow_cast(2, 'Duration(Millisecond)'))
+----
+0.002
+
+query R
+SELECT extract(second from arrow_cast(2002, 'Duration(Millisecond)'))
+----
+2.002
+
+query R
+SELECT extract(millisecond from arrow_cast(2002, 'Duration(Millisecond)'))
+----
+2002
+
+query R
+SELECT extract(day from arrow_cast(864000, 'Duration(Second)'))
+----
+10
+
+query error DataFusion error: Arrow error: Compute error: Month does not
support: Duration\(Second\)
+SELECT extract(month from arrow_cast(864000, 'Duration(Second)'))
+
+query error DataFusion error: Arrow error: Compute error: Year does not
support: Duration\(Second\)
+SELECT extract(year from arrow_cast(864000, 'Duration(Second)'))
+
+query error DataFusion error: Execution error: Cannot convert
Duration\(Second\) to epoch
+SELECT extract(epoch from arrow_cast(864000, 'Duration(Second)'))
Review Comment:
Ah, good, I didn't understand that, I thought that epoch was always relative
to the 1970 date.
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