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Table a = ….
Table b = a.select(...).filter(...)
intInteger cmax = b.max()
int d = b.min(.orderBy($("val").desc()).limit(1).execute().collect().next().getField(...)
Integer min = b.orderBy($("val").asc()).limit(1).execute().collect().next().getField(...) // recompute table b from table a
Table e = b.select("(f1 - min)/(max - min)").filter(...)
e.execute().print() // recompute table b from table a
...
If (b.count() > 10) { // recompute table b from table a
  b.select(UDF1(...)).execute().print()// recompute table b from table a
} else {
  b.select(UDF2(...)).execute().print()
}