[jira] [Created] (SPARK-31880) Adjacent value parsing not supported for Localized Patterns because JDK bug

["Kent Yao (Jira)" <ji...@apache.org>]

Kent Yao created SPARK-31880:
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             Summary: Adjacent value parsing not supported for Localized Patterns because JDK bug
                 Key: SPARK-31880
                 URL: https://issues.apache.org/jira/browse/SPARK-31880
             Project: Spark
          Issue Type: Sub-task
          Components: SQL
    Affects Versions: 3.0.0, 3.1.0
            Reporter: Kent Yao



{code:java}
spark-sql> set spark.sql.legacy.timeParserPolicy=exception;
spark.sql.legacy.timeParserPolicy	exception
spark-sql> select to_timestamp('202011', 'YYYYww');
{code}

{code:java}
Caused by: java.time.format.DateTimeParseException: Text '202011' could not be parsed at index 0
	at java.time.format.DateTimeFormatter.parseResolved0(DateTimeFormatter.java:1949)
	at java.time.format.DateTimeFormatter.parse(DateTimeFormatter.java:1777)
	at org.apache.spark.sql.catalyst.util.Iso8601TimestampFormatter.$anonfun$parse$1(TimestampFormatter.scala:79)
	... 99 more
{code}


{code:java}
spark-sql> set spark.sql.legacy.timeParserPolicy=legacy;
spark.sql.legacy.timeParserPolicy	legacy
spark-sql> select to_timestamp('202011', 'YYYYwu');
2019-12-30 00:00:00
spark-sql> select to_timestamp('202011', 'YYYYww');
2020-03-08 00:00:00
{code}


The result could vary between different JDKs



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