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