SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 8)
    Identifier array
    Identifier class.d1
    Identifier class.a1
    Identifier class.a2
    Identifier class.a3
    Identifier class.a4
    Identifier class.a5
    Identifier class.a6
   TablesInSelectQuery (children 2)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier aliases_test
    TablesInSelectQueryElement (children 1)
     ArrayJoin (children 1)
      ExpressionList (children 1)
       Identifier struct (alias class)
