yaooqinn commented on a change in pull request #28592:
URL: https://github.com/apache/spark/pull/28592#discussion_r427956371
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File path: sql/core/src/test/resources/sql-tests/inputs/datetime.sql
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@@ -122,3 +122,13 @@ select to_timestamp("2019-10-06T10:11:12'12",
"yyyy-MM-dd'T'HH:mm:ss''SSSS"); --
select to_timestamp("2019-10-06T10:11:12'", "yyyy-MM-dd'T'HH:mm:ss''"); -- tail
select to_timestamp("'2019-10-06T10:11:12", "''yyyy-MM-dd'T'HH:mm:ss"); -- head
select to_timestamp("P2019-10-06T10:11:12", "'P'yyyy-MM-dd'T'HH:mm:ss"); --
head but as single quote
+
+-- Unsupported narrow text style
+select date_format(date '2020-05-23', 'GGGGG');
Review comment:
This question may beyond the scope of this PR. So far, using an invalid
pattern for parsing always returns `NULL`, which is also compatible with 2.4.
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