SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function arrayJoin (alias x) (children 1)
     ExpressionList (children 1)
      Literal Array_[UInt64_0, UInt64_6, UInt64_7, UInt64_9, UInt64_10]
   ExpressionList (children 1)
    Function quantileGK (children 2)
     ExpressionList (children 1)
      Identifier x
     ExpressionList (children 2)
      Literal UInt64_100
      Literal Float64_0.5
