SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function multiply (children 1)
     ExpressionList (children 2)
      Function uniq (children 1)
       ExpressionList (children 1)
        Identifier b
      Function any (children 1)
       ExpressionList (children 1)
        Identifier _sample_factor
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 2)
      TableIdentifier t_sample_factor
      SampleRatio 200000
   Function less (children 1)
    ExpressionList (children 2)
     Identifier a
     Literal Int64_-1
