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antonmks / Alenka

GPU database engine
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get some wrong results #42

Closed sam1988 closed 11 years ago

sam1988 commented 11 years ago

using dbgen to generate 20G data and then running q1 and q6

and i check the results with mysql and monetdb.

and the result running q6 with alenka and mysql ,monetdb the result is the same

but running q1 i get different results

alenka results: A|F|1132393551078.85|755169104|25.50|38239.09|0.05|1118803345410.88|1075769269507.28|0.04|29613505| R|F|1132556540140.25|755284493|25.51|38246.80|0.05|1118968269619.38|1075930611640.11|0.04|29611797| N|O|2229413402673.42|1486771871|25.50|38235.37|0.05|2202675535336.87|2117943983015.22|0.04|58307621| N|F|29582901058.72|19739848|25.53|38262.38|0.05|29230208447.21|28103693343.31|0.04|773159|

mysql results: N|O|2293949394287.65|1529813855|25.50|38234.94|0.05|2266438501095.17|2179254402765.45|0.04|53307656| R|F|1132556540140.25|755284493|25.51|38246.80|0.05|1118968269619.38|1075930611640.11|0.04|29611797| A|F|1132393551078.85|755169104|25.50|38239.09|0.05|1118803345410.88|1075769269507.28|0.04|29613505| N|F|29582901058.72|19739848|25.53|38262.38|0.05|29230208447.21|28103693343.31|0.04|773159|

we get four rows and only one row(the first row of mysql resluts) is different with alenka and the result with monetdb is same as mysql

antonmks commented 11 years ago

Well, better check your results. The first set of results is what you supposed to get. I checked it by loading the data at scale 20 to Oracle 11 and my Oracle results are identical to that of Alenka. You might also take Scale 1 results, multiply it by 20 and see that your N|O results are a bit off.