ABHISHEK KUMAR GUPTA created SPARK-29776:
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Summary: rpad returning invalid value when parameter is empty
Key: SPARK-29776
URL: https://issues.apache.org/jira/browse/SPARK-29776
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 3.0.0
Reporter: ABHISHEK KUMAR GUPTA
As per rpad definition
rpad
rpad(str, len, pad) - Returns str, right-padded with pad to a length of len
If str is longer than len, the return value is shortened to len characters.
*In case of empty pad string, the return value is null.*
Below is Example
In Spark:
0: jdbc:hive2://10.18.19.208:23040/default> SELECT rpad('hi', 5, '');
+----------------+
| rpad(hi, 5, ) |
+----------------+
| hi |
+----------------+
It should return NULL as per definition.
Hive behavior is correct as per definition it returns NULL when pad is empty
String
INFO : Concurrency mode is disabled, not creating a lock manager
+-------+
| _c0 |
+-------+
| NULL |
+-------+
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