[jira] [Created] (SPARK-29342) Make casting strings to intervals case insensitive

["Maxim Gekk (Jira)" <ji...@apache.org>]

Maxim Gekk created SPARK-29342:
----------------------------------

             Summary: Make casting strings to intervals case insensitive 
                 Key: SPARK-29342
                 URL: https://issues.apache.org/jira/browse/SPARK-29342
             Project: Spark
          Issue Type: Sub-task
          Components: SQL
    Affects Versions: 3.0.0
            Reporter: Maxim Gekk


PostgreSQL is not sensitive to case of interval string values:
{code}
maxim=# select cast('10 Days' as INTERVAL);
 interval 
----------
 10 days
(1 row)
{code}
but Spark is not tolerant to case:
{code}
spark-sql> select cast('INTERVAL 10 DAYS' as INTERVAL);
NULL
spark-sql> select cast('interval 10 days' as INTERVAL);
interval 1 weeks 3 days
{code}
 



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