SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function dictGetKeys (children 1)
     ExpressionList (children 3)
      Function toString (children 1)
       ExpressionList (children 1)
        Identifier number
      Literal \'u64\'
      Function toUInt64 (children 1)
       ExpressionList (children 1)
        Literal UInt64_7
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_1
