yaooqinn edited a comment on pull request #28650:
URL: https://github.com/apache/spark/pull/28650#issuecomment-635448724
No the pattern `yyyyyyyyyyy-MM-dd` is valid for both version of formatters,
but calling the `format()` throws an exception in the new one but silently
suppressed in FromUnixTime expression. Now we are not suppressing the
exceptions in this PR,
it will do the same as `date_format`
```
spark-sql> select from_unixtime(1, 'yyyyyyyyyyy-MM-dd'); -- this is before
NULL
spark-sql> select date_format('now', 'yyyyyyyyyyy-MM-dd'); -- this will be
after for `from_unixtime` too
20/05/29 00:14:47 ERROR SparkSQLDriver: Failed in [ select
date_format('now', 'yyyyyyyyyyy-MM-dd')]
java.lang.ArrayIndexOutOfBoundsException: 11
at
java.time.format.DateTimeFormatterBuilder$NumberPrinterParser.format(DateTimeFormatterBuilder.java:2568)
at
java.time.format.DateTimeFormatterBuilder$CompositePrinterParser.format(DateTimeFormatterBuilder.java:2190)
```
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