static void Stat3Get_(FuncContext fctx, int argc, Mem[] argv)
{
int n = Vdbe.Value_Int(argv[1]);
Stat3Accum p = (Stat3Accum)Vdbe.Value_Blob(argv[0]);
Debug.Assert(p != null);
if (p.a.length <= n)
{
return;
}
switch (argc)
{
case 2: Vdbe.Result_Int64(fctx, p.a[n].Rowid); break;
case 3: Vdbe.Result_Int64(fctx, p.a[n].Eq); break;
case 4: Vdbe.Result_Int64(fctx, p.a[n].Lt); break;
default: Vdbe.Result_Int64(fctx, p.a[n].DLt); break;
}
}
static void Stat3Init_(FuncContext fctx, int argc, Mem[][] argv)
{
tRowcnt rows = (tRowcnt)Vdbe.Value_Int64(argv[0]);
int maxSamples = Vdbe.Value_Int(argv[1]);
int n = maxSamples;
Stat3Accum p = new Stat3Accum
{
a = new array_t <Stat3Accum.Stat3Sample>(new Stat3Accum.Stat3Sample[n]),
Rows = rows,
MaxSamples = maxSamples,
PSamples = (uint)(rows / (maxSamples / 3 + 1) + 1),
};
if (p == null)
{
Vdbe.Result_ErrorNoMem(fctx);
return;
}
SysEx.Randomness(-1, p.Prn);
Vdbe.Result_Blob(fctx, p, -1, C._free);
}