SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Identifier s1
    Identifier s2
    Function compareSubstrings (children 1)
     ExpressionList (children 5)
      Identifier s1
      Identifier s2
      Literal UInt64_0
      Literal UInt64_3
      Literal UInt64_4
   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 concat (alias s1) (children 1)
            ExpressionList (children 2)
             Literal \'ab\'
             Function modulo (children 1)
              ExpressionList (children 2)
               Identifier number
               Literal UInt64_3
           Function concat (alias s2) (children 1)
            ExpressionList (children 2)
             Literal \'ab\'
             Function modulo (children 1)
              ExpressionList (children 2)
               Identifier number
               Literal UInt64_4
          TablesInSelectQuery (children 1)
           TablesInSelectQueryElement (children 1)
            TableExpression (children 1)
             Function numbers (children 1)
              ExpressionList (children 1)
               Literal UInt64_6
