Dropping global temporary table

Hi: I am on 10.2.0.3.
I have an interesting problem with global temporary tables.
I created a few and was using them for awhile.
Now I am trying to drop one (it has a couple indexes as well) and here is what I am getting:
SQL> drop table sysadm.PS_BPA_RATES_TA011;
drop table sysadm.PS_BPA_RATES_TA011
ERROR at line 1:
ORA-14452: attempt to create, alter or drop an index on temporary table already in use
Needless to say I checked the active sessions (using v$session) but there is none which locks this table.
I truncated it (although it had 0 rows but I was trying to free up space), also tried to flush shared_pool & buffer_cache (it's a test DB) - which were successful but did not help - I am getting the same error.
Someone suggested checking V$TEMPSEG_USAGE where segtype='DATA'. This view shows 3 rows with session# & sql_id but both does not show any session:
SQL> select * from V$TEMPSEG_USAGE where segtype='DATA';
USERNAME USER SESSION_ADDR SESSION_NUM SQLADDR SQLHASH SQL_ID
TABLESPACE CONTENTS SEGTYPE SEGFILE# SEGBLK# EXTENTS BLOCKS SEGRFNO#
SYSADM SYSADM C00000021C1D2318 123 C0000002DB467ED0 146923226 0ahnqxh4c3rqu
TEMP TEMPORARY DATA 204 465289 1 128 4
SYSADM SYSADM C00000021C1CE508 32644 C00000021B6D3F58 2784120300 0c5411akz4mgc
TEMP TEMPORARY DATA 204 506761 14 1792 4
SYSADM SYSADM C00000021C1CE508 32644 C00000021B6D3F58 2784120300 0c5411akz4mgc
TEMP TEMPORARY DATA 204 505993 1 128 4
SYSADM SYSADM C00000021C1CE508 32644 C00000021B6D3F58 2784120300 0c5411akz4mgc
TEMP TEMPORARY DATA 204 505865 1 128 4
SQL> select session_num,sql_id from V$TEMPSEG_USAGE where segtype='DATA';
SESSION_NUM SQL_ID
123 0ahnqxh4c3rqu
32644 0c5411akz4mgc
32644 0c5411akz4mgc
32644 0c5411akz4mgc
SQL> select sid,serial#,process from v$session where sql_id='0ahnqxh4c3rqu';
no rows selected
SQL> select sid,serial#,process from v$session where sid=32644;
no rows selected
I know that recycling the database should help but I can not do it right now - and I am sure there should be a solution.
Any help appreciated. TIA,
GregX

I found a solution to this.
You have to use V$TEMPSEG_USAGE where segtype='DATA'.
Column session_num corresponds to serial#. The job was canceled from the front end but this session was still hanging in there. After I killed it the drop worked.
Lots of people are saying that truncate should help with this problem. That's not true.

Similar Messages

ORA-00955 reports when I try to "create global temporary table" in windows

Hi,
When I try to run the sql in my oracle 9i server which is installed in a windows2000 machine,
Create global temporary table test ...;
For the first time, I can create table successfully.
But I cannot access this table any more:
drop table test;
desc test;
select * from test;
In addition, if I try to create the table again, I got the error:
ORA-00955: name is already used by an existing object
While the same table can be created and dropped in another oracle9i server which is installed in Solaris 9 machine.
So I suspect that this sould be a bug of window oracle server.
Is there anyone who can confirm this?
Or who can tell me how to report this bug to oracle?
Thanks in advance.
Please also refer the message at:
http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:1046974576560
If you search the text: "create global temporary table sess_event", you can see for the first time, the table is created successfully.
But the ORA-00955 reports when the author try to create table for the second time.
This problem is exactly the same as my problem.
I have also made a search both in Google and in Oracle website and I cannot find any solution of it.

Read Metalink Note:68098.1 Subject: Overview of Temporary Tables
How did you difine the temporary tables? on commit delete rows are reserv rows?
http://download-west.oracle.com/docs/cd/B10501_01/appdev.920/a96590/adg03sch.htm#7794
Jaffar
Message was edited by:
The Human Fly

Transaction with Global Temporary Table

Problem:
Transaction starts with few DML statements and in the middle we are calling a JAVA method which creates the dynamic global temporary table and proceeding with few DML statements, if one of the statement fails, in the exception clause we are trying to rollback and transactions after the DDL (create global temp table) are rolled back and transactions before the DDL (create global temp table) are committed.
We cannot pre-create the global temporary table, since we do not know the number of temp table to be pre-created.
How we can resolve this issue? The same concept works for SQL server.
Example of our issue:
--drop table table1 purge;
--drop table t_id purge;
Create table table1 (col1 number, col2 varchar2(20));
Insert into table1 values (1, 'Test1');
Create global temporary table t_id (id number);
Insert into table1 values (2, 'Test2');
Rollback;
After the rollback you can see only the 'Test1' record.

> We cannot pre-create the global temporary table, since we do not know the number of temp table to be pre-created.
I don't see how one procedure could need to create an unknown number of temporary tables. Do they all have different (and unknown) column lists? Couldn't you combine them into a single table with a key to distinguish betweeen the different sets of rows?

How to drop a temporary table?

Hi ,
I try to create e temprary table with
create global temporary table My_table_name ( ..... ) ON COMMIT PRESERVE ROWS ;
All is OK.
I try this step:
insert into My_Table_name select ..... ;
All is OK.
After this I try :
delete from My_table_name ;
All is OK.
But if I try to make:
drop table My_table_name , Oracle reports that I can not drop this table ( the table is in use).
Where is the problem?
Many thanks in advance.
null

Hi,
You have created a session specific table which will only be dropped when you come out of the session. if you want to drop in the same session try using on commit delete rows that is the transaction specific table.
regards
gaurav
null

Failure on attempt to Declare Global Temporary Table

I am working with SAP and I am seeing the following error on the REAL TIME STATISTICS DATABASE on any attempt to declare a global temporary table by any process:
On the following attempt
DECLARE GLOBAL TEMPORARY TABLE SESSION.FILL_STAT_TAB_TMP
AS ( SELECT IXNAME, IXCREATOR,
FAROFFPOSF, NEAROFFPOSF, LEAFDIST FROM SYSIBM.SYSINDEXPART )
DEFINITION ONLY CCSID UNICODE ON COMMIT DROP TABLE
I get the following error
DSNT408I SQLCODE = -904, ERROR: UNSUCCESSFUL EXECUTION CAUSED BY AN
UNAVAILABLE RESOURCE. REASON 00C90081, TYPE OF RESOURCE 00000100, AND
RESOURCE NAME DSNRTSDB
DSNRTSDB appears to be started. I have EXPLICITLY started it. I have dropped and recreated the RTS tables, starting the database again. We have a temp database created, and 2 tablespaces created in the temp database, one of page size 4k and the other of pagesize 8k.
I am able to query the RTS tables with no problem.
We have 8 other subsystems that we migrated to v8 that have no problems. This particular subsystem was an install, but what that might have to do with anything I don't know.
What am I missing?
Thanks.

Hi,
sorry, i've no answer only another question.
I'm searching with google on 'FILL_STAT_TAB_TMP' and this post is all i get ;-(
My problem is a little bit different.
I'm doing a RUNSTATS with DB20 or DB13 and it works. But in the SM21 appears this:
ST04: [IBM][CLI Driver][DB2] DSNT408I SQLCODE = -204, ERROR: SESSION.FILL_STAT_TAB_TMP IS AN UNDEFINED NAME
But if i put the statement from Steve above into spufi, it works without error.
The dis database(dsnrtsdb) shows this:
NAME     TYPE PART STATUS
DSNRTSTS TS         RW
INDEXSPA IX         RW
TABLESPA IX         RW
Kay

Inserts into Global Temporary Table

I'm working on using a global temporary table in one of my apps. I have a small test run here to isolate the problem. It simply creates the global temporary table, inserts a row, commits and then does a select to see if the insert worked. No data shows in the table when running this. I don't know much about global temp tables, so any help would be appreciated.
CREATE GLOBAL TEMPORARY TABLE AGENT_SILO.AS_TEMP_VALIDATE (
SBI_EMPLOYEE_ID NUMBER,
CURRENT_FLAG char(1),
EFFECTIVE_START date,
EFFECTIVE_END date
) ON COMMIT DELETE ROWS;
INSERT INTO AGENT_SILO.AS_TEMP_VALIDATE(SBI_EMPLOYEE_ID, CURRENT_FLAG, EFFECTIVE_START, EFFECTIVE_END)
VALUES(0, '', SYSDATE, SYSDATE);
commit;
SELECT * FROM AGENT_SILO.AS_TEMP_VALIDATE;

So I wonder what else I'm doing wrong that's really obvious. Here's what i'm trying to accomplish and maybe there's a better way of going about it.
I have a trigger that is supposed to do some validation before the insert is allowed to go through. So here's my approach. I have a trigger fired when there's an insert into the AS_Employee_history table. This passes some of the fields from this insert into a proc (the id, a flag and a couple of dates). Within the proc, i create a global temp table, insert these passed values into the temp table. Then I have a cursor to basically copy the rows from the as_employee_history table that have the same id. Then I can do some selects on the temp table to see if it passes the validation.
I have outputs throughout for debugging and it gets to right after the inserts into the temp table, then the rest of the code doesn't appear to be executed. So it looks like it's failing at the execution of select statements on the temp table. Anything else obvious that I"m missing here?
Here's my proc.
PROCEDURE "PAS_VALIDATE" (STATUS OUT VARCHAR2, v_status OUT BOOLEAN, NEW_SBI_EMPLOYEE_ID IN NUMBER,
NEW_CURRENT_FLAG IN CHAR, NEW_EFFECTIVE_START IN DATE,
NEW_EFFECTIVE_END IN DATE)
IS
v_prev_effective_end date;
v_flag_count number;
v_flag_count_date number;
--variables to store dynamic sql returns
v_sql_flag_count_date varchar2(255);
v_sql_flag_count varchar2(255);
v_sql_prev_eff_end varchar2(255);
cursor c_row is
select * from AGENT_SILO.AS_EMPLOYEE_HISTORY EMP
where (EMP.SBI_EMPLOYEE_ID = NEW_SBI_EMPLOYEE_ID);
r_row c_row%ROWTYPE;
BEGIN
Status := 'Started';
v_status := true;
DBMS_OUTPUT.PUT_LINE('Creating temporary table...');
execute immediate 'CREATE GLOBAL TEMPORARY TABLE AGENT_SILO.AS_TEMP_VALIDATE (
SBI_EMPLOYEE_ID NUMBER,
CURRENT_FLAG char(1),
EFFECTIVE_START date,
EFFECTIVE_END date
) ON COMMIT PRESERVE ROWS';
     DBMS_OUTPUT.PUT_LINE('Validating the data...');
     --DBMS_OUTPUT.PUT_LINE('Inserting submitted row into temp table');
--Insert the new row being submitted from user into the temp table
execute immediate 'INSERT INTO AGENT_SILO.AS_TEMP_VALIDATE(SBI_EMPLOYEE_ID, CURRENT_FLAG, EFFECTIVE_START, EFFECTIVE_END)
VALUES(' || NEW_SBI_EMPLOYEE_ID || ',
''' || NEW_CURRENT_FLAG || ''',
to_date(''' || to_char(NEW_EFFECTIVE_START, 'mm/dd/yyyy hh:mi:ss') || ''', ''mm/dd/yyyy hh:mi:ss''),
to_date(''' || to_char(NEW_EFFECTIVE_END, 'mm/dd/yyyy hh:mi:ss') || ''', ''mm/dd/yyyy hh:mi:ss''))';
--Insert the other rows to we end up with a subset of the employee history table
--with only rows that match the sbi_employee_id of the submitted row
     --DBMS_OUTPUT.PUT_LINE('Inserting into temp table...');
open c_row;
loop
fetch c_row into r_row;
exit when c_row%NOTFOUND;
execute immediate 'INSERT INTO AGENT_SILO.AS_TEMP_VALIDATE(SBI_EMPLOYEE_ID, CURRENT_FLAG, EFFECTIVE_START, EFFECTIVE_END)
VALUES(' || r_row.SBI_EMPLOYEE_ID || ',
''' || r_row.CURRENT_FLAG || ''',
to_date(''' || to_char(r_row.EFFECTIVE_START, 'mm/dd/yyyy hh:mi:ss') || ''', ''mm/dd/yyyy hh:mi:ss''),
to_date(''' || to_char(r_row.EFFECTIVE_END, 'mm/dd/yyyy hh:mi:ss') || ''', ''mm/dd/yyyy hh:mi:ss''))';
end loop;
close c_row;
DBMS_OUTPUT.PUT_LINE('After inserts');
-----Store queries to determine values for validation--------------------------
v_sql_prev_eff_end := 'SELECT to_char(max(effective_end), ''dd-mon-yy'')
FROM AGENT_SILO.AS_TEMP_VALIDATE
where to_char(EFFECTIVE_END, ''dd-mon-yy'') != ''31-dec-99'' AND
SBI_EMPLOYEE_ID = NEW_SBI_EMPLOYEE_ID';
--Find the largest effective_end, besides the 9999 value
execute immediate v_sql_prev_eff_end into v_prev_effective_end;
DBMS_OUTPUT.PUT_LINE('The highest previous end date: ' || v_prev_effective_end);
--...........Validation testing...........
execute immediate 'DROP TABLE AGENT_SILO.AS_TEMP_VALIDATE'; --Drop temp table
DBMS_OUTPUT.PUT_LINE('Validation Procedure Complete');
COMMIT;
status:='Success';
EXCEPTION
When Others Then
ROLLBACK;
Status := SQLERRM;
END;
Thanks a bunch for helping a noob out.

Auditing data from global temporary table

Hi I have a process that uses a global temporary table.
What it does it serve a consolidation point to merge a lot of data.
Some the former designer decides to use a global temporary table and the row will be gone once it got commit.
However, the data is corrupted occasionally. And ideally we would like to fix the upstream source data but this is too complicated and not feasible.
So we decide to audit the data going into the global temporary table. We want to generate a report on the corrupted data.
However, whenever I commit, the data is gone from the global temporary table and we do not want to set it to commit preserve rows for the global temporary table
Even with autonomous transaction this is not working out as once it commits the data is gone.
Any idea how this can be done. Here are the prototype that I build to demo this:
drop table gt_tst1;
--this is the table its data needs to get audit
create global temporary table gt_tst1(id number); --on commit preserve rows;
drop table not_gt_tst1;
--this table is used for storign the corrupt data and generate report
create table not_gt_tst1 as select * from gt_tst1;
CREATE OR REPLACE PROCEDURE tst_gt_tst1 IS
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
--if there is a way to do the insert and select once. but it seems it is not working for global temporay table unless change it to on commit preserve rows
INSERT
when m2 = 0 THEN
INTO not_gt_tst1(id)values(object_id)
when m3 = 0 THEN
INTO gt_tst1(id) values (object_id)
select object_id,mod(object_id,2) m2, mod(object_id,3) m3 from dba_objects where rownum < 101;
COMMIT;
END tst_gt_tst1;
select sysdate from dual;
truncate table gt_tst1;
truncate table not_gt_tst1;
select * from gt_tst1;
select * from not_gt_tst1;
execute tst_gt_tst1;
select * from gt_tst1; -- data gone
select * from not_gt_tst1;
--commit
select sysdate from dual;
spool off

The data is poor and the code is poor and the dev and QA env is also poor..
And the business asks us to fix the data..However..we do not have an environment close enough to test it out before it got put into production that is the bottom line.
Heres the dev and QA env cannot be trust to the extent that I can sign off and say it will give the same behavior as the production env
So we would like to minimize the risk as there are other process uses these table and we are not sure if changing this would lead to UN-expected behavior.
We cannot tell some other process rely on the fact that these table got empty out after commit.
Edited by: vxwo0owxv on Jan 23, 2012 12:18 PM
Edited by: vxwo0owxv on Jan 23, 2012 12:20 PM

Global temporary table error

Hi i had taken out script of global temporary table from pl/sql developer its is coming like below.
create global temporary table abc of XYZ
on commit preserve rows;
when i tried to create that global temp table again some other schema i am getting error.
where XYZ is a TYPE.
create global temporary table abc of XYZ on commit preserve rows
ERROR at line 1:
ORA-00902: invalid datatype
Please help me in this.

The following works when global temporary table and type are in the same schema:
SQL> select * from v$version;
BANNER
Oracle Database 10g Express Edition Release 10.2.0.1.0 - Product
PL/SQL Release 10.2.0.1.0 - Production
CORE 10.2.0.1.0 Production
TNS for 32-bit Windows: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
SQL>
SQL> drop table tt purge;
Table dropped.
SQL> drop table tp purge;
Table dropped.
SQL>
SQL> drop type xyz force;
Type dropped.
SQL>
SQL> create type xyz as object (x int)
2 /
Type created.
SQL> show errors
No errors.
SQL> create table tp of xyz
2 /
Table created.
SQL> show errors
No errors.
SQL> create global temporary table tt of xyz;
Table created.Edited by: P. Forstmann on 4 déc. 2009 19:36
Edited by: P. Forstmann on 4 déc. 2009 19:47

Use of global temporary tables in Procedures

Hi
I am using global temporary tables in the procedures. Loading data in the same table through many procedures. I am fetching the data from the global temporary table in PRO-C by a cursor. Will this degrade performance?
Please help me..
Thanks in Advance...

Will this degrade performance?That depends... in comparison to what?
Loading data into temporary tables will generally be more efficient than loading data into permanent tables because Oracle needs to do less to protect this data since it is inherently transient. On the other hand, loading the data into a table in the first place tends to be more expensive than alternatives like using a single SQL statement, a pipelined table function, or an in memory collection.
Justin

Life time of data in a Global Temporary Table.

Dear Friends,
I have a global temporary table in which I insert some values via a backend package, when forms start up and accessing it via the same package when user performs some changes in it - storing the value and during exit saving it in the master table. My problem is the data is not accessible while processing. I'm using Oracle9i Enterprise Edition Release 9.2.0.1.0 database and Forms [32 Bit] Version 6.0.8.8.0. I also give you the script in using which I created the temporary table.
CREATE GLOBAL TEMPORARY TABLE GTT_PRA
A1 VARCHAR2(10 BYTE) NOT NULL,
A2 VARCHAR2(15 BYTE) NOT NULL,
A3 VARCHAR2(10 BYTE) NOT NULL
ON COMMIT DELETE ROWS;
Why is that so? Please help me.
With Regards,
Senthil .A. Perumal.

Dear Arun,
Thank you for your script. But I'm accessing a large table, so for each and every process, the table get populated and grows very large giving some space problem, that is why I'm deleting rows when commiting. I would appreciate your help.
Dear Yogesh,
From the same forms I'm calling the backend package - will that be a different session. Once I'm calling to populate the table and next time I'm calling to store the user modified data and finally calling to store the data to master table. I think all are in the same sessions. Please reply me.
Thank you dear friends fr your immediate response. I would really appreciate it.
Regards,
Senthil .A. Perumal.

How can i create a Global Temporary Table inside a Stored Procedure....

Hi...
I need to create a Global Temporary Table inside a Stored
Procedure....
I have no idea how to do that....
Please....if u can send me a sample, send to me....
Thanks a lot

To create a global temporary table inside a stored procedure,
the minimal syntax would be:
CREATE OR REPLACE PROCEDURE procedure_name
AS
BEGIN
EXECUTE IMMEDIATE 'CREATE GLOBAL TEMPORARY TABLE table_name'
|| '(column_name NUMBER)';
END procedure_name;
As Todd stated, it would probably be better to create the global
temporary table outside of the procedure:
SQL> CREATE GLOBAL TEMPORARY TABLE table_name
2 (column_name NUMBER);
Table created.
You can also specify things like ON COMMIT PRESERVE ROWS or ON
COMMIT DELETE ROWS.
It may be that there is something else, like a PL/SQL table of
records or a cursor, that would suit your needs better. It is
difficult to guess without knowing what you want to do with it.

Creating a Global Temporary Table on non-default TEMP tablespace.

Hello ,
I am using Oracle 11g.
I have a procedure which create global temporary tables for its functionality. As the data which is going in the global temporary table , mean the data which is going in the default TEMP tablesapce is too huge ..... billions of rows..
So what i want to do is , I want to create the global temporary table in another TEMP2 tablespace ( which is not the default one) so the load of billions of rows of data will be shifted to TEMP2. The default TEMP tablespace will not be affected and it can be used for other transactions.
Is this possible. Can i shift the global temporary table from TEMP( Default temp tablespace) to TEMP2 ( the non-default temp tablespace) ????
Please guide me with proper solutions and examples ....
Thanks in advance ..

DBA4 wrote:
Hello ,
I am using Oracle 11g.
I have a procedure which create global temporary tables for its functionality. As the data which is going in the global temporary table , mean the data which is going in the default TEMP tablesapce is too huge ..... billions of rows..
So what i want to do is , I want to create the global temporary table in another TEMP2 tablespace ( which is not the default one) so the load of billions of rows of data will be shifted to TEMP2. The default TEMP tablespace will not be affected and it can be used for other transactions.
Is this possible. Can i shift the global temporary table from TEMP( Default temp tablespace) to TEMP2 ( the non-default temp tablespace) ????
Global temporary tables are instantiated in the temporary tablespace of the schema that inserts the data - not into "the default" temporary tablespace.
Assume Schema1 creates a GTT and grants all on that table to schema2
Assume schema1 also creates a procedure (authid owner, the default) to insert data into the GTT and grants execute on the procedure to schema2
If schema2 executes: insert into schema1.gtt, the data will appear in the temporary tablespace of schema2
If schema2 executes: execute schema1.procedure, the data will appear in the temporary tablespace of schema1
So if you want to protect the "normal" temporary tablespace, you could just create a special temporary tablespace for the owner of the procedure.
Regards
Jonathan Lewis

Creating and Dropping a temporary table in Bi publisher?

Hi all.
My database is sybase.
I created a new data set in BI publisher where it creates a temporary table,
uses that temp table in a select query and then I dropped the temporary table.
I wrote all these 3 SQL statements in a single dataset.
This is executed for the first time with out any errors.
The second time I am tryiong to run the report..It says It cannot create temp table as it has one temp table with the same name.
When I execute the same query in my database (SQL developer) this works. But not working in BI publisher.
Please suggest.

I came across this thread...in this forum while looking for a solution..
Can i create temporary table with BI Publisher ?
If we have to use a data template...Does the function in data trigger necessarily needs to be a PL/SQL function? because..we donot use oracle database. we use T-SQL to write queries..

Global temporary table in PL/SQL called from APEX page

I have a global temporary table in a PL/SQL procedure that is called from an APEX page.
The global temp table is populated with data as the procedure runs and then at the end of the procedure I do a create_collection_from_query_b to populate a collection with the data from the temp table. (I do this b/c it is much faster than creating the collection and doing an add_member for each row.)
The problem is that there are no commits in my procedure but I cannot get the bulk insert to work unless I define the temp table as on commit preserve rows.
Can anyone shed any light on this issue.
Thanks,
Andrew

alamantia wrote:
My PL/SQL procedure is called from an after submit page process. Does that imply that there is a commit happening after that process is successful?Ultimately, yes.
If the process calls the PL/SQL procedure and the temp table is in the procedure, wouldn't the commit fire after all the PL/SQL code is complete which would be after the bulk insert from the temp table to my collection?Yes, but at any point in the procedure containing code like
:APEX_ITEM := ...or
select ... into :APEX_ITEM from ...or
my_procedure(p_in => ..., p_out => :APEX_ITEM, ...);or
apex_util.set_session_state(...);then APEX will commit whilst maintaining session state.
If you don't have any of these events in the procedure, then test to see if the commit is occurring in <tt>apex_collection.create_collection_from_query_b</tt> prior to creation of the collection.

Doubt with Global Temporary table

hi,
i have created a global temporary table with ON COMMIT DELETE ROWS option. in my Function in a loop i m inserting values into this Table, after that loop closes and then i m selecting some other values from DB. and in the last i am returning a ref cursor which is selecting values from temporary table i hav created.
now the thing is i m not getting any values in the cursor.
later I have created the table with ON COMMIT PRESERVE ROWS option, in this case cursor returning values,
can anyone explain me the functionality, as per my knowledge global temporary table values are session specific so why i m not getting the values in the 1st case when i used ON COMMIT DELETE ROWS (same session).
Thanks
Piyush

Ok, here's a simple example, like we'd like to see from you not working....
First create a GTT with ON COMMIT DELETE ROWS...
SQL> ed
Wrote file afiedt.buf
1* create global temporary table mytable (x number) on commit delete rows
SQL> /
Table created.Now a simple function that populates the GTT and returns a ref cursor to the data without doing any commits (hence the data should be there!)
SQL> ed
Wrote file afiedt.buf
1 create or replace function pop_table return sys_refcursor is
2    v_rc sys_refcursor;
3 begin
4    insert into mytable
5    select rownum from dual connect by rownum <= 10;
6    OPEN v_rc FOR SELECT x FROM mytable;
7    RETURN v_rc;
8* end;
SQL> /
Function created.So now we call the function and get a reference to our ref cursor...
SQL> var v_a refcursor;
SQL> exec :v_a := pop_table();
PL/SQL procedure successfully completed.So, in principle, because no commits have been issued the ref cursor should return data...
SQL> print v_a;
         X
         1
         2
         3
         4
         5
         6
         7
         8
         9
        10
10 rows selected.... which it does.
Now, what happens if we do that again...
SQL> commit;
Commit complete.
SQL> exec :v_a := pop_table();
PL/SQL procedure successfully completed.... but this time we commit before retrieving the data...
SQL> commit;
Commit complete.
SQL> print v_a;
ERROR:
ORA-00600: internal error code, arguments: [kcbz_check_objd_typ_1], [0], [0], [1], [], [], [], []
no rows selected
SQL>Oracle has (correctly) lost reference to the data because of the commit.
So show us what yours is doing.

Dropping global temporary table

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