Major Description
The current lpad and rpad don't support the multibyte character at "str" and "pad".
For example, we can see the following result.
hive> select name from sample1;
OK
tokyo
ＴＯＫＹＯ
hive> select lpad(name, 20, '*') from sample1;
OK
***************tokyo
*****ＴＯＫＹＯ
This is improved as follows.
hive> select lpad(name, 20, '*') from sample1;
***************tokyo
***************ＴＯＫＹＯ
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