it seems that carbondata 1.5 will using spark2.3.2，so the spark2.3.1will be deprecated。however，our online circumstance is based on spark2.3.1，and now we are using carbondata1.5 master to test, and we find the effect of query is good。we hope that carbondata1.5 shoud be compatibled with spark2.3.1，so that our circumstance will not be affected。
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