JDBC: How to select only those records which contains col1 is NULL

Question

Hi All,
In JDBC SELECT scenario.
I wants to select only those records which contains col1 is NULL.
I am trying as follows:
<key>
<col1 isNull="TRUE" />
</key>
but in moni/monitoring i am getting Following Error
006-12-01 19:35:20 Error Unable to execute statement for table or stored procedure. 'BG_SALARY_SEND_SAP_D' (Structure 'SELECT') due to java.sql.SQLException: FATAL ERROR document format: structure 'SELECT', key element 'key' contains no values
2006-12-01 19:35:20 Error Exception caught by adapter framework: Error processing request in sax parser: Error when executing statement for table/stored proc. 'BG_SALARY_SEND_SAP_D' (structure 'SELECT'): java.sql.SQLException: FATAL ERROR document format: structure 'SELECT', key element 'key' contains no values
Please suggest how to do select rows with col1 is null.
Regards

Answer 1

Rohan,
isNull= true is used to make the KEY element not mandatory.
In your case, if the select query is
select emp from emptest where empno is null
, then the datatype will be,
<root>
<StatementName>
<dbTableName action=”SELECT”>
  <table>emptest</table>
<access>
<emp></emp>
</access>
<key1>
<b><empno hasQuot="NO">is null</empno></b>
</key1>
</dbTableName> 
</StatementName>
</root>
I dont have a DB access to try this, but I think this should work.
If this doesnt work, then you would need to use SQL_QUERY,
<root>
<StatementName>
<anyName action=” SQL_QUERY”>
<access>select emp from emptest where empno is null</access>
</anyName > 
</StatementName>
</root>
http://help.sap.com/saphelp_nw04/helpdata/en/2e/96fd3f2d14e869e10000000a155106/content.htm
Regards,
Bhavesh