SelectWithUnionQuery (children 1)
 ExpressionList (children 3)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Literal UInt64_1 (alias c1)
    Literal UInt64_2 (alias c2)
    Literal UInt64_3 (alias c3)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Literal UInt64_1 (alias c1)
    Literal UInt64_2 (alias c2)
    Literal UInt64_3 (alias c3)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Literal UInt64_1 (alias c1)
    Literal UInt64_2 (alias c2)