Use CONV to apply proper mysql chunking #983
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The MySQL MD5() function returns a binary string of 32 hex digits.
MySQL MOD() expects two decimal numbers.
If the md5 contains any hex character that is not a digit MOD() is always returning
0. This is causing a huge imbalance in data downstream since all of these records are getting bucketed under the task reading from 'partition' 0.The solution is to apply MySQL CONV() from hex base 16 to decimal base 10
This was all tested locally via MySQL Workbench