SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Identifier name
    Identifier description
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.settings
   Function notEquals (children 1)
    ExpressionList (children 2)
     Function substring (children 1)
      ExpressionList (children 3)
       Identifier description
       Literal UInt64_1
       Literal UInt64_1
     Function upper (children 1)
      ExpressionList (children 1)
       Function substring (children 1)
        ExpressionList (children 3)
         Identifier description
         Literal UInt64_1
         Literal UInt64_1