SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 4)
    Function length (children 1)
     ExpressionList (children 1)
      Identifier haystack
    Function length (children 1)
     ExpressionList (children 1)
      Function arrayElement (children 1)
       ExpressionList (children 2)
        Identifier matches
        Literal UInt64_1
    Function length (children 1)
     ExpressionList (children 1)
      Identifier matches
    Function arrayMap (children 1)
     ExpressionList (children 2)
      Function lambda (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 1)
          Identifier x
        Function length (children 1)
         ExpressionList (children 1)
          Identifier x
      Function arrayMap (children 1)
       ExpressionList (children 2)
        Function lambda (children 1)
         ExpressionList (children 2)
          Function tuple (children 1)
           ExpressionList (children 1)
            Identifier x
          Function arrayElement (children 1)
           ExpressionList (children 2)
            Identifier x
            Literal UInt64_1
        Identifier matches
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Subquery (children 1)
       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_10
           Function extractAllGroupsVertical (alias matches) (children 1)
            ExpressionList (children 2)
             Identifier haystack
             Function repeat (children 1)
              ExpressionList (children 2)
               Literal \'(\\\\w)\'
               Literal UInt64_100
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function numbers (children 1)
              ExpressionList (children 1)
               Literal UInt64_3
