SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 3)
    Function substring (alias prefix) (children 1)
     ExpressionList (children 3)
      Literal \'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa\'
      Literal UInt64_1
      Identifier number
    Function concat (alias a) (children 1)
     ExpressionList (children 3)
      Identifier prefix
      Literal \'y\'
      Identifier prefix
    Function concat (alias b) (children 1)
     ExpressionList (children 2)
      Identifier prefix
      Literal \'x\'
   ExpressionList (children 5)
    Function equals (children 1)
     ExpressionList (children 2)
      Identifier a
      Identifier b
    Function less (children 1)
     ExpressionList (children 2)
      Identifier a
      Identifier b
    Function greater (children 1)
     ExpressionList (children 2)
      Identifier a
      Identifier b
    Function lessOrEquals (children 1)
     ExpressionList (children 2)
      Identifier a
      Identifier b
    Function greaterOrEquals (children 1)
     ExpressionList (children 2)
      Identifier a
      Identifier b
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_40