SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function countMatches (children 1)
     ExpressionList (children 2)
      Function repeat (children 1)
       ExpressionList (children 2)
        Literal \'\\0\\0\\0\\0\\0\\0\\0\\0\\0\\0a\'
        Literal UInt64_1000000
      Literal \'a\'
