如何将参数传递给WSO2 DSS中的Cassandra CQL查询

我一直在尝试获取在WSO2 DSS中工作的参数化CQL查询。不幸的是，我一直不成功。感谢您的帮助，因为我被困在紧急事件中。如何将参数传递给WSO2 DSS中的Cassandra CQL查询

以下是DBS文件内容

<data name="CassParamTest"> 
    <config id="CassDs"> 
     <property name="org.wso2.ws.dataservice.protocol">jdbc:cassandra://localhost:9161/oneDataAux</property> 
     <property name="org.wso2.ws.dataservice.driver">org.apache.cassandra.cql.jdbc.CassandraDriver</property> 
    </config> 
    <query id="getEmps" useConfig="CassDs"> 
     <sql>select employeeNumber from EMPLOYEES where employeeNumber = :employeeNumber</sql> 
     <param name="employeeNumber" sqlType="STRING" /> 
    </query> 
    <operation name="getEmps"> 
     <call-query href="getEmps"> 
     <with-param name="employeeNumber" query-param="employeeNumber" /> 
     </call-query> 
    </operation> 
</data>

其实参数employeeNumber是一个数字。但我不断收到错误。所以我也试图用String也无济于事。我也试过了？而不是命名参数

这是我得到的错误。

当参数是一个字符串，

<soapenv:Fault xmlns:soapenv="http://www.w3.org/2003/05/soap-envelope" xmlns:axis2ns12="http://ws.wso2.org/dataservice"> 
    <soapenv:Code> 
     <soapenv:Value>axis2ns12:DATABASE_ERROR</soapenv:Value> 
    </soapenv:Code> 
    <soapenv:Reason> 
     <soapenv:Text xml:lang="en-US" xmlns:xml="http://www.w3.org/XML/1998/namespace">DS Fault Message: Error in DS non result invoke. 
DS Code: DATABASE_ERROR 
Nested Exception:- 
javax.xml.stream.XMLStreamException: DS Fault Message: Error in 'SQLQuery.processNormalQuery' 
DS Code: DATABASE_ERROR 
Source Data Service:- 
Name: CassParamTest 
Location: /CassParamTest.dbs 
Description: N/A 
Default Namespace: http://ws.wso2.org/dataservice 
Current Request Name: getEmps 
Current Params: {employeeNumber=1002} 
Nested Exception:- 
java.sql.SQLNonTransientException: No Update Count was returned from the CQL statement passed in an 'executeUpdate()' method 

</soapenv:Text> 
    </soapenv:Reason> 
    <soapenv:Detail> 
     <axis2ns11:DataServiceFault xmlns:axis2ns11="http://ws.wso2.org/dataservice">DS Fault Message: Error in DS non result invoke. 
DS Code: DATABASE_ERROR 
Nested Exception:- 
javax.xml.stream.XMLStreamException: DS Fault Message: Error in 'SQLQuery.processNormalQuery' 
DS Code: DATABASE_ERROR 
Source Data Service:- 
Name: CassParamTest 
Location: /CassParamTest.dbs 
Description: N/A 
Default Namespace: http://ws.wso2.org/dataservice 
Current Request Name: getEmps 
Current Params: {employeeNumber=1002} 
Nested Exception:- 
java.sql.SQLNonTransientException: No Update Count was returned from the CQL statement passed in an 'executeUpdate()' method 

</axis2ns11:DataServiceFault> 
    </soapenv:Detail> 
</soapenv:Fault>

当参数是一个数字，

DS Code: DATABASE_ERROR 
Nested Exception:- 
javax.xml.stream.XMLStreamException: DS Fault Message: Error in 'SQLQuery.processNormalQuery' 
DS Code: DATABASE_ERROR 
Source Data Service:- 
Name: CassParamTest 
Location: /CassParamTest.dbs 
Description: N/A 
Default Namespace: http://ws.wso2.org/dataservice 
Current Request Name: getEmps 
Current Params: {employeeNumber=1002} 
Nested Exception:- 
java.sql.SQLException: Mismatched types: java.math.BigInteger cannot be cast to java.lang.String

谢谢您的时间和你的帮助

来源

2012-12-27 Gunith Devasurendra

我找到了解决方案。我错过了一个输出映射。似乎如果输出映射不存在，DSS将该命令作为更新命令（请参阅http://docs.wso2.org/wiki/display/DSS301/Cassandra）

来源

2012-12-28 03:32:57

是的，这是正确的。在内部执行什么类型的查询的决定是通过检查查询是否具有结果与否 –

如何将参数传递给WSO2 DSS中的Cassandra CQL查询

回答

相关问题