Github user dilipbiswal commented on the issue:
https://github.com/apache/spark/pull/22470
@mgaido91 makes sense. Actually @cloud-fan had asked me to write some test
cases for decimal values with -ve scale in another PR. While i was playing
around, i found this issue. It seemed to me that the whole -ve scale thingy is
not thought through properly. Thats the reason i wanted to share my findings
here while you guys are discussing this :-).
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