SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function repeat (alias haystack) (children 1)
     ExpressionList (children 2)
      Literal \'abcdefghijklmnopqrstuvwxyz\'
      Function multiply (children 1)
       ExpressionList (children 2)
        Identifier number
        Literal UInt64_100
    Function extractAllGroupsHorizontal (alias matches) (children 1)
     ExpressionList (children 2)
      Identifier haystack
      Literal \'(\\\\w)\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_1023
