SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 4)
    Identifier id
    Identifier value
    Identifier _database
    Identifier _table
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier 02563_db.test_merge_table
   ExpressionList (children 1)
    OrderByElement (children 1)
     Identifier id
