sql - SSIS Derived Column Calcuation Issue -


i having issue derived column calculation in ssis not returning correct values. give background, had change format of calculation due overflow issue (resolved), see here - ssis - derived column calculation error

now, old , new calculations return different values in ssis, though both mathematically same , return same value when executed in .net, excel , sql.

in .net - 

decimal test1 = convert.todecimal((415 * 415 * 415) * 0.000000030940000); decimal test2 = convert.todecimal((0.000000030940000 * 415 * 415 * 415));

both return 2.2113862225

in ssis - 

test1 = ((415 * 415 * 415) * 0.000000030940000) test2 = (0.000000030940000 * 415 * 415 * 415)

return different values (test1 = 2.2113862225 , test2 = 2.211535)

interestingly, ssis sees test1 numeric (38,6) , test2 numeric (27,15)....

has encountered issue before?

i don't want have re-factor whole package use .net calculations, last resort solution.

in case else has problem - didn't find solution did implement workaround -

instead of doing calculation in derived column -

  1. use derived column component reate variable , set 0
  2. add data conversion , switch required data type (float in case)
  3. add ole db command call stored procedure calculation, output parameter filling variable created @ point 1.

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