Github user wangyum commented on the issue: https://github.com/apache/spark/pull/21010 > Basically LGTM, but I'm wondering what if the expr2 is not like a format string? The same as Hive: ```sql spark-sql> SELECT format_number(12332.123456, 'abc'); abc12332 ``` ```sql hive> SELECT format_number(12332.123456, 'abc'); OK abc12332 Time taken: 0.218 seconds, Fetched: 1 row(s) ```
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