cloud-fan commented on a change in pull request #27906: [SPARK-31150][SQL]
Parsing seconds fraction with variable length for timestamp
URL: https://github.com/apache/spark/pull/27906#discussion_r393156181
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File path: sql/core/src/test/resources/sql-tests/results/datetime.sql.out
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@@ -391,3 +391,122 @@ select date '2001-10-01' - date '2001-09-28'
struct<subtractdates(DATE '2001-10-01', DATE '2001-09-28'):interval>
-- !query output
3 days
+
+
+-- !query
+select to_timestamp(v, 'yyyy-MM-dd HH:mm:ss.SSSSSS[zzz]') from values
+ ('2019-10-06 10:11:12.'),
+ ('2019-10-06 10:11:12.0'),
+ ('2019-10-06 10:11:12.1'),
+ ('2019-10-06 10:11:12.12'),
+ ('2019-10-06 10:11:12.123UTC'),
+ ('2019-10-06 10:11:12.1234'),
+ ('2019-10-06 10:11:12.12345CST'),
+ ('2019-10-06 10:11:12.123456PST') t(v)
+-- !query schema
+struct<to_timestamp(t.`v`, 'yyyy-MM-dd HH:mm:ss.SSSSSS[zzz]'):timestamp>
+-- !query output
+2019-10-06 03:11:12.123
Review comment:
This is hard to read as the output order is different from the input order.
Can we break it down to multiple queries? or put the input column in the output
as well, e.g. `select v, to_timestamp(v, ...`
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