Rollback after analyze command

Question

Hi Everyone,
My DB version is
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - 64bi
PL/SQL Release 10.2.0.1.0 - Production
"CORE    10.2.0.1.0    Production"
TNS for Linux: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
I've inserted 5 rows in a table, but didn't commit the transaction.
After that I executed following query to update the plan table.
analyze table <table_name> compute statistics
Then I query the plan table for the update, it's updated, but after that I rolled back the transaction
and was hoping that those 5 records will be deleted from that table as I didn't commit the transaction.
But that didn't happen. So my question is when I was computed the statistics, previous DML statement
is committed automatically or what happened? Why ROLLBACK is not working for that table?
Regards,
BS2012. 

Answer 1

I tried this in Oracle 11gr2 version and found similar characteristic.
CREATE TABLE tmp (nm VARCHAR2 (100));
Table created.
INSERT INTO tmp
     VALUES ('A');
1 row created.
INSERT INTO tmp
     VALUES ('B');
1 row created.
INSERT INTO tmp
     VALUES ('C');
1 row created.
INSERT INTO tmp
     VALUES ('D');
1 row created.
INSERT INTO tmp
     VALUES ('E');
1 row created.
ANALYZE TABLE tmp COMPUTE STATISTICS;
Table analyzed.
ROLLBACK;
Rollback complete.
SELECT COUNT (*) FROM tmp;
count(*)
5
According to documentation:
COMPUTE STATISTICS instructs Oracle Database to compute exact statistics about the analyzed object and store them in the data dictionary. When you analyze a table, both table and column statistics are collected.
So Analyze is basically doing a commit into data dictinary in the same session.
Probably that is the reason why rollback does not work here.
Its like simple example:
I inserted 100 rows in a table without commit;
Created a new table in same session (DDL implicit commit)
rollback;
-- that rollback will not have effect on the 100 rows we committed before.
I guess Gurus will come up with better examples than what I have elucidated.
Cheers,
Manik.