I need to truncate a number to 4 digits after the dot, without rounding it. I tried to use format_number(num,4) but it does do rounding. I need to truncate it without rounding, just to throw away the other digits. any ideas?
How to truncate a double to four digits in hive without rounding?
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There would be 2 way to do it since all hive supplied function would end up rounding.
http://lets-do-something-big.blogspot.com/2014/02/hive-udf-example.html