Does callableStatement.SetNull() work fine with ojdbc5.jar in oracle 11gr2

Question

Hello,
CallableStatement.setNull(1, Types.ARRAY) throws java.sql.SQLException: Invalid column type: sqlType=2003
and
CallableStatement.setNull(1, Types.ARRAY, "SOMEARRAYTYPE") throws java.sql.SQLException: ORA-06531: Reference to uninitialized collection
ORA-06512: at "SYSTEM.SOMEARRAYTYPE", line 6
ORA-06512: at line 1
Is this a problem with the driver? Is there any other way of setting null value for a parameter of ARRAY type?
Thanks.

Answer 1

user8915609 wrote:
But setNull(..) itself means that we are setting a null value. doesn't it?I dunno.. what does the Java docs say?
I am using setNull(..) instead of setObject(..) because i want to set a null value for an array parameter of the stored procedure.Well, that does not seem to be working, does it? So it is reasonable to assume that your are not correctly using/understanding what the setNull() call does.
For example (following on from the sample code I posted above), it depends on what one attempts to set to null in a collection:
SQL> declare
  2          variable        TStrings;
  3  begin
  4          --// a variable can be null
  5          variable := null;
  6  end;
  7  /
PL/SQL procedure successfully completed.
SQL>
SQL> declare
  2          variable        TStrings;
  3  begin
  4          --// a collection item cannot be null if the
  5          --// collection itself has not been instantiated
  6          variable(1) := null;
  7  end;
  8  /
declare
ERROR at line 1:
ORA-06531: Reference to uninitialized collection
ORA-06512: at line 6
SQL>
SQL> declare
  2          variable        TStrings;
  3  begin
  4          --// instantiate with 2 items/strings in the collection
  5          variable := new TStrings('1','2');
  6 
  7          --// now we can set an existing item to null
  8          variable(1) := null;
  9  end;
10  /
PL/SQL procedure successfully completed.
SQL> If you code a command in ANY language, then you need to know EXACTLY what the command does, and why you are using it.
If not - then it is a fail on your part.