How to return a OCI Table * (nested table) from OCI application to sqlplus

Question

Hi,
How to return a OCI Table * (nested table) from OCI application to sqlplus prompt : OCITAble * shows up as empty on the SQLPLUS prompt.
The ODCIAggregateTerminate member function's OUT parameter is OCITable * returnValue. After completion of this member function it displays data on the sqlplus prompt.
My problem is that eventhough my OCITable(returnvalue) has elements appended or added to it. But when I return the OCITAble after completion
of this member function the OCITable shows up as empty collection on the SQLPLUS prompt. But in the OCI code if I iterate through the collection
I can print out the elements and see their values or data.
Can any one let me know how I can make the elements or data in the collection available at SQLPLUS prompt after the completion of this member function.
If my return value or OUT parameter of this member function is OCINumber * returnValue : then I can see the corresponding value assigned in the OCI Code
and the same value is returned and visible on the SQLPLUS prompt. But when I use the OUT parameter as OCITAble * : then it shows up as empty collection.
I don't really know why is it happening so.
member function ODCIAggregateTerminate(
self IN OUT MinDistanceImpl, returnValue OUT table_out1,
flags IN number)
return number
as language C
library custagg name "ODCIAggregateTerminate"
with context
parameters (
context,
self,
self INDICATOR STRUCT,
returnValue ,
returnValue INDICATOR,
flags,
flags INDICATOR ,
RETURN ),
typedef OCITable table_out1;
struct ntab_type
OCINumber empno;
OCINumber salary;
OCIString * tst;
OCIString * te;
typedef struct ntab_type ntab_type;
struct ntab_type_ind
OCIInd _atomic;
OCIInd empno;
OCIInd salary;
OCIInd tst;
OCIInd te;
typedef struct ntab_type_ind ntab_type_ind;
extern "C" OCINumber * ODCIAggregateTerminate(
OCIExtProcContext *context,
MinDistanceImpl * self,
MinDistanceImpl_ind * self_ind,
table_out1 * returnValue,
short * returnValue_ind,
OCINumber * flags,
short flags_ind)
ocitypename for collection..
ocitypename for element
ociobjectnew for collection
ociobjectNew's for elements
ocicollappend of elements to collection
then iterate thru collection
and at them collection as those elements and we return that collection
But is empty : on SQLPLUS prompt :
Select Mindis(TT) from table1;
TT(empno, salary, tstart, te)
Table_Out1()

Answer 1

> Can anyone pls let me know if there is some way to return an entire table from a function which
is called from a stored procedure?
For what purpose?
Do you realise that this means pulling Megabytes (or even many Gugabytes) of data from disk, into the buffer cache, and then copying that data into PL/SQL memory (using a function) in order to give a stored proc that data?
This is just plain crazy.. resource wise, performance wise, scalability wise.. this is exactly how NOT to use Oracle.
Why don't you instead tell us what problem you want to solve. Forget for the moment what you think the solution should be. (and asking us how to get a potentially flawed solution, to work)
Let's get an accurate problem definition so that we can provide you with suggestions and recommendation on what Oracle features can be used to address that problem.