Question

我的数据源在查询中需要?，但这不是参数。但是在使用?的情况下，DSS会将NullPointerException作为错误消息返回。我可以使用内部H2数据的简单sql查询重现错误。

查询：

select '?' as c1 from dual

结果在日志中：

DS Code: DATABASE_ERROR
Source Data Service:-
Name: ttttt
Location: \ttttt.dbs
Description: N/A
Default Namespace: http://ws.wso2.org/dataservice
Current Request Name: q1
Current Params: {}
Nested Exception:-
java.lang.NullPointerException

        at org.wso2.carbon.dataservices.core.description.query.SQLQuery.processPreNormalQuery(SQLQuery.java:832)
        at org.wso2.carbon.dataservices.core.description.query.SQLQuery.runPreQuery(SQLQuery.java:2301)
        at org.wso2.carbon.dataservices.core.description.query.Query.execute(Query.java:275)
        at org.wso2.carbon.dataservices.core.engine.CallQuery.executeElement(CallQuery.java:188)
        at org.wso2.carbon.dataservices.core.engine.OutputElement.execute(OutputElement.java:89)
        at org.wso2.carbon.dataservices.core.description.operation.Operation.execute(Operation.java:61)
        at org.wso2.carbon.dataservices.core.engine.DataService.invoke(DataService.java:474)
        at org.wso2.carbon.dataservices.core.engine.DSOMDataSource.execute(DSOMDataSource.java:96)
        ... 43 more
Caused by: java.lang.NullPointerException
        at org.wso2.carbon.dataservices.core.description.query.SQLQuery.processDynamicQuery(SQLQuery.java:1395)
        at org.wso2.carbon.dataservices.core.description.query.SQLQuery.createProcessedPreparedStatement(SQLQuery.java:1506)
        at org.wso2.carbon.dataservices.core.description.query.SQLQuery.processPreNormalQuery(SQLQuery.java:806)
        ... 50 more

也许有一些特殊的参数可以强制wso2dss不要自己解析查询并使用数据库引擎进行解析？

wso2 dss 3.2.2：选择'？'来自双抛出NullPointerException

0 个答案: