Question

我相信我发现了一个错误。不知道在哪里，并寻找关于解决它的最佳方法的建议。

这是创建sql视图脚本的代码：

return MessageFormat.format(
            "CREATE VIEW {0} AS " +
            "SELECT T.{1} AS {2}, T.{3} AS {4}, T.{5} AS {6}, " +
            "T.{7} AS {8}, T.{9} AS {10}, " +
            "MAX(CASE WHEN T.{11} = TS.{12} THEN TS.{13} ELSE '''' END) AS {14}, " +
            "MAX(CASE WHEN T.{15} = TS.{16} THEN TS.{17} ELSE '''' END) AS {18}, " +
            "MAX(CASE WHEN T.{19} = TS.{20} THEN TS.{21} ELSE 0 END) AS {22}, " +
            "MAX(CASE WHEN T.{23} = TS.{24} THEN TS.{25} ELSE 0 END) AS {26}, " +
            "MAX(CASE WHEN T.{27} = TS.{28} THEN TS.{29} ELSE '''' END) AS {30}, " +
            "MAX(CASE WHEN T.{31} = TS.{32} THEN TS.{33} ELSE '''' END) AS {34}, " +
            "MAX(CASE WHEN T.{35} = TS.{36} THEN TS.{37} ELSE 0 END) AS {38}, " +
            "MAX(CASE WHEN T.{39} = TS.{40} THEN TS.{41} ELSE 0 END) AS {42}, " +
            "COALESCE(MAX(ABS(TA_Weight.{43})), 0) {44}, " +
            "COALESCE(MAX(ABS(TA_PayBasis.{45})), 0) {46}, " +
            "SUM(COALESCE(ABS(TSA_Miles.{47}), 0)) {48} " +
            "FROM {49} T " +
            "INNER JOIN {50} TS ON T.{51} = TS.{52} " +
            "LEFT OUTER JOIN {53} TA_Weight ON T.{54} = TA_Weight.{55} AND TA_Weight.{56} = ''H:W'' " +
            "LEFT OUTER JOIN {57} TA_PayBasis ON T.{58} = TA_PayBasis.{59} AND TA_PayBasis.{60} = ''H:AGR'' " +
            "LEFT OUTER JOIN {61} TSA_Miles ON TS.{62} = TSA_Miles.{63} AND TS.{64} = TSA_Miles.{65} AND TSA_Miles.{66} = ''D:DD'' " +
            "GROUP BY T.{67}, T.{68}, T.{69}, T.{70}, T.{71}",
            TRIP_VIEW_NAME,
            TRIP_COL_TRIP_ID, TRIP_VIEW_COL_TRIP_ID, TRIP_COL_IS_VIEWED, TRIP_VIEW_COL_IS_VIEWED, TRIP_COL_IS_ACCEPTED, TRIP_VIEW_COL_IS_ACCEPTED,
            TRIP_COL_IS_DECLINED, TRIP_VIEW_COL_IS_DECLINED, TRIP_COL_STATUS, TRIP_VIEW_COL_STATUS,
            TRIP_COL_FIRST_STOP_NUMBER, TRIP_STOP_COL_STOP_NUMBER, TRIP_STOP_COL_MUNICIPALITY, TRIP_VIEW_COL_FROM_MUNICIPALITY,
            TRIP_COL_FIRST_STOP_NUMBER, TRIP_STOP_COL_STOP_NUMBER, TRIP_STOP_COL_ADMINISTRATIVE_AREA, TRIP_VIEW_COL_FROM_ADMINISTRATIVE_AREA,
            TRIP_COL_FIRST_STOP_NUMBER, TRIP_STOP_COL_STOP_NUMBER, TRIP_STOP_COL_SCHEDULED_ARRIVAL_FROM, TRIP_VIEW_COL_PICKUP_DATE,
            TRIP_COL_FIRST_STOP_NUMBER, TRIP_STOP_COL_STOP_NUMBER, TRIP_STOP_COL_TIME_ZONE, TRIP_VIEW_COL_PICKUP_TIME_ZONE,
            TRIP_COL_LAST_STOP_NUMBER, TRIP_STOP_COL_STOP_NUMBER, TRIP_STOP_COL_MUNICIPALITY, TRIP_VIEW_COL_TO_MUNICIPALITY,
            TRIP_COL_LAST_STOP_NUMBER, TRIP_STOP_COL_STOP_NUMBER, TRIP_STOP_COL_ADMINISTRATIVE_AREA, TRIP_VIEW_COL_TO_ADMINISTRATIVE_AREA,
            TRIP_COL_LAST_STOP_NUMBER, TRIP_STOP_COL_STOP_NUMBER, TRIP_STOP_COL_SCHEDULED_ARRIVAL_FROM, TRIP_VIEW_COL_DELIVERY_DATE,
            TRIP_COL_FIRST_STOP_NUMBER, TRIP_STOP_COL_STOP_NUMBER, TRIP_STOP_COL_TIME_ZONE, TRIP_VIEW_COL_DELIVERY_TIME_ZONE,
            TRIP_ATTRIBUTE_COL_VALUE, TRIP_VIEW_COL_WEIGHT,
            TRIP_ATTRIBUTE_COL_VALUE, TRIP_VIEW_COL_PAY_BASIS,
            TRIP_STOP_ATTRIBUTE_COL_VALUE, TRIP_VIEW_COL_MILES,
            TRIP_TABLE_NAME,
            TRIP_STOP_TABLE_NAME, TRIP_COL_TRIP_ID, TRIP_STOP_COL_TRIP_ID,
            TRIP_ATTRIBUTE_TABLE_NAME, TRIP_COL_TRIP_ID, TRIP_ATTRIBUTE_COL_TRIP_ID, TRIP_ATTRIBUTE_COL_NAME,
            TRIP_ATTRIBUTE_TABLE_NAME, TRIP_COL_TRIP_ID, TRIP_ATTRIBUTE_COL_TRIP_ID, TRIP_ATTRIBUTE_COL_NAME,
            TRIP_STOP_ATTRIBUTE_TABLE_NAME, TRIP_STOP_COL_TRIP_ID, TRIP_STOP_ATTRIBUTE_COL_TRIP_ID, TRIP_STOP_COL_STOP_NUMBER, TRIP_STOP_ATTRIBUTE_COL_STOP_NUMBER, TRIP_STOP_ATTRIBUTE_COL_NAME,
            TRIP_COL_TRIP_ID, TRIP_COL_IS_VIEWED, TRIP_COL_IS_ACCEPTED, TRIP_COL_IS_DECLINED, TRIP_COL_STATUS);

你看我如何以双重勾选逃避单一勾号，''''应该在我理解的结果字符串中变成''。

在Android模拟器中运行此代码我得到以下字符串：

        CREATE VIEW TripView AS SELECT T.TripId AS TripId, T.IsViewed AS IsViewed, T.IsAccepted AS IsAccepted, T.IsDeclined AS IsDeclined, T.Status AS Status, 
MAX(CASE WHEN T.FirstDispatchedStopNumber = TS.StopNumber THEN TS.Municipality ELSE '' END) 
    AS FromMunicipality, MAX(CASE WHEN T.FirstDispatchedStopNumber = TS.StopNumber THEN TS.AdministrativeArea ELSE '' END) AS FromAdministrativeArea, MAX(CASE WHEN T.FirstDispatchedStopNumber = TS.StopNumber THEN TS.ScheduledArrivalFrom ELSE 0 END) AS PickupDate, MAX(CASE WHEN T.FirstDispatchedStopNumber = TS.StopNumber THEN TS.TimeZone ELSE 0 END) AS PickupTimeZone, MAX(CASE WHEN T.LastDispatchedStopNumber = TS.StopNumber THEN TS.Municipality ELSE '' END) AS ToMunicipality, MAX(CASE WHEN T.LastDispatchedStopNumber = TS.StopNumber THEN TS.AdministrativeArea ELSE '' END) AS ToAdministrativeArea, MAX(CASE WHEN T.LastDispatchedStopNumber = TS.StopNumber THEN TS.ScheduledArrivalFrom ELSE 0 END) AS DeliveryDate, MAX(CASE WHEN T.FirstDispatchedStopNumber = TS.StopNumber THEN TS.TimeZone ELSE 0 END) AS DeliveryTimeZone, COALESCE(MAX(ABS(TA_Weight.Value)), 0) Weight, COALESCE(MAX(ABS(TA_PayBasis.Value)), 0) PayBasis, SUM(COALESCE(ABS(TSA_Miles.Value), 0)) Miles FROM Trip T INNER JOIN TripStop TS ON T.TripId = TS.TripId LEFT OUTER JOIN TripAttribute TA_Weight ON T.TripId = TA_Weight.TripId AND TA_Weight.Name = 'H:W' LEFT OUTER JOIN TripAttribute TA_PayBasis ON T.TripId = TA_PayBasis.TripId AND TA_PayBasis.Name = 'H:AGR' LEFT OUTER JOIN TripStopAttribute TSA_Miles ON TS.TripId = TSA_Miles.TripId AND TS.StopNumber = TSA_Miles.StopNumber AND TSA_Miles.Name = 'D:DD' GROUP BY T.TripId, T.IsViewed, T.IsAccepted, T.IsDeclined, T.Status

当我在实际设备上运行时，我得到以下信息：

    CREATE VIEW TripView AS SELECT T.TripId AS TripId, T.IsViewed AS IsViewed, T.IsAccepted AS IsAccepted, T.IsDeclined AS IsDeclined, T.Status AS Status, 
MAX(CASE WHEN T.FirstDispatchedStopNumber = TS.StopNumber THEN TS.Municipality ELSE ''' END) 
AS FromMunicipality, MAX(CASE WHEN T.FirstDispatchedStopNumber = TS.StopNumber THEN TS.AdministrativeArea ELSE ''' END) AS FromAdministrativeArea, MAX(CASE WHEN T.FirstDispatchedStopNumber = TS.StopNumber THEN TS.ScheduledArrivalFrom ELSE 0 END) AS PickupDate, MAX(CASE WHEN T.FirstDispatchedStopNumber = TS.StopNumber THEN TS.TimeZone ELSE 0 END) AS PickupTimeZone, MAX(CASE WHEN T.LastDispatchedStopNumber = TS.StopNumber THEN TS.Municipality ELSE ''' END) AS ToMunicipality, MAX(CASE WHEN T.LastDispatchedStopNumber = TS.StopNumber THEN TS.AdministrativeArea ELSE ''' END) AS ToAdministrativeArea, MAX(CASE WHEN T.LastDispatchedStopNumber = TS.StopNumber THEN TS.ScheduledArrivalFrom ELSE 0 END) AS DeliveryDate, MAX(CASE WHEN T.FirstDispatchedStopNumber = TS.StopNumber THEN TS.TimeZone ELSE 0 END) AS DeliveryTimeZone, COALESCE(MAX(ABS(TA_Weight.Value)), 0) Weight, COALESCE(MAX(ABS(TA_PayBasis.Value)), 0) PayBasis, SUM(COALESCE(ABS(TSA_Miles.Value), 0)) Miles FROM Trip T INNER JOIN TripStop TS ON T.TripId = TS.TripId LEFT OUTER JOIN TripAttribute TA_Weight ON T.TripId = TA_Weight.TripId AND TA_Weight.Name = 'H:W' LEFT OUTER JOIN TripAttribute TA_PayBasis ON T.TripId = TA_PayBasis.TripId AND TA_PayBasis.Name = 'H:AGR' LEFT OUTER JOIN TripStopAttribute TSA_Miles ON TS.TripId = TSA_Miles.TripId AND TS.StopNumber = TSA_Miles.StopNumber AND TSA_Miles.Name = 'D:DD' GROUP BY T.TripId, T.IsViewed, T.IsAccepted, T.IsDeclined, T.Status

看起来像某个地方的错误。脚本第3行显示差异，''vs'''

Answer 1

根据MessageFormat reference的规则，这肯定是错误的。您的模拟器似乎正在做正确的事情，但设备上的JRE似乎错误地解释''''。

表示两个单引号的另一种方法是将它们转义为：\'\'\'\'这可能会为您的设备的JRE提供足够的信息，您希望它们单独处理。这可能仍然会导致相同的错误，但值得一试，以防万一。

我对三个单引号的猜测是：

第一个单引号来自前两个
第二单引号来自第二和第三
第三单引号来自第3和第4个

这是中间的错误。第二个单引号在第一遍中消耗，因此不应被视为另一对的一部分。

值得将此报告给您设备上使用的JRE源。

更简单的测试用例是：

System.out.println(MessageFormat.format("Say ''''{0}''''", "hello"));

哪个应该给

说''你好''

作为输出，但应该在设备的JRE'hello'之前和之后显示三个单引号而不是两个。

转义单引号的MessageFormat.format问题

1 个答案: