SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function mapContainsKeyLike (children 1)
     ExpressionList (children 2)
      Function map (children 1)
       ExpressionList (children 4)
        Literal \'aa\'
        Literal UInt64_1
        Literal \'bb\'
        Literal UInt64_2
      Function materialize (children 1)
       ExpressionList (children 1)
        Literal \'a%\'