Hi @Kleber_Augusto,
Is this a SAS dataset? Have you thought of using the SPD engine? Index performance could very well benefit, expecially if you have multiple CPU's.
Also, it sounds like you are afraid performance will be bad but have not tested this yet to be sure. I suggest you do that, preferably together with the users; you may be surprised. I find SAS datasets in general performing remarkably well. Also, some people might no longer consider 187 million rows a giant anymore 😉 Modern hardware and a well designed storage system will make short work of these amounts of data.
Do keep in mind that in case of a compound index it will still be used if you use a subset of the variables starting from the left. So if the index is (a,b,c) it will be used if only (a,b) are involved, but not in case of (b) or (b,c).
Hope this helps,
- Jan.
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