About global temporary table

Question

forms_ddl('truncate table SUB_BF reuse storage');
insert /*+ APPEND */ into SUB_BF select * from SUB_TEMP_BF;
Hi all,
sub_bf is a regular table and sub_temp_bf is gtt(global temporary). and a report is populate base on sub_bf table. but when i use delete statement instead of truncate statemen
then the reports come but when i use truncate reports doesn't shows any values.
i can't use delete statement because it slow and my user concurrently generate the report so sub_bf tables become lock. and reports become hangs.
BR//
Sanjay

Answer 1

sub_bf is a regular table and sub_temp_bf is gtt(global temporary). and a report is populate base on sub_bf table. but when i use delete statement instead of truncate statemen
then the reports come but when i use truncate reports doesn't shows any values.Truncate is a DDL and results in auto commit of all pending transactions of that session, while delete will require explicit COMMIT or ROLLBACK.
Please check CREATE TABLE Specificatin for GTT SUB_TEMP_BF, if it has an on COMIIT DELETE ROWS clause, then probably because of truncate, all rows in table SUB_TEMP_BF are getting delete before inserting in table sub_bf.
Vivek L