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Oracle Tutorials - Transaction Commit When DDL Statement Executed

By: FYIcenter.com

(Continued from previous topic...)

What Happens to the Current Transaction If a DDL Statement Is Executed?

If a DDL statement is executed, the current transaction will be committed and ended. All the database changes made in the current transaction will become permanent. This is called an implicit commit by a DDL statement. The following tutorial exercise shows you that the CREATE TABLE statement forced the current transaction to be committed and ended. The subsequent ROLLBACK statement has no effects on the closed transaction.

SQL> connect HR/fyicenter

SQL> INSERT INTO fyi_links (url, id) 
  2  VALUES ('oracle.com', 112);
  
SQL> INSERT INTO fyi_links (url, id) 
  2  VALUES ('sql.com', 113);

SQL> CREATE TABLE fyi_temp AS (SELECT * FROM fyi_links);
Table created.

SQL> ROLLBACK;
Rollback complete.

SQL> SELECT * FROM fyi_links;
     ID URL              NOTES          COUNTS CREATED
------- ---------------- ---------- ---------- ---------
    101 fyicenter.com                          07-MAY-06
    110 centerfyi.com                          07-MAY-06
    112 oracle.com                             07-MAY-06
    113 sql.com                                07-MAY-06

(Continued on next topic...)

  1. What Is a Transaction?
  2. How To Start a New Transaction?
  3. How To End the Current Transaction?
  4. How To Create a Test Table for Transaction Testing?
  5. How To Commit the Current Transaction?
  6. How To Rollback the Current Transaction?
  7. What Happens to the Current Transaction If a DDL Statement Is Executed?
  8. What Happens to the Current Transaction If the Session Is Ended?
  9. What Happens to the Current Transaction If the Session Is Killed?
  10. How Does Oracle Handle Read Consistency?
  11. What Is a READ WRITE Transaction?
  12. What Is a READ ONLY Transaction?
  13. How To Set a Transaction To Be READ ONLY?
  14. What Are the Restrictions in a READ ONLY Transaction?
  15. What Are the General Rules on Data Consistency?
  16. What Are Transaction Isolation Levels Supported by Oracle?
  17. What Is a Data Lock?
  18. How Data Locks Are Respected?
  19. How To Experiment a Data Lock?
  20. How To View Existing Locks on the Database?
  21. What Is a Dead Lock?
  22. How Oracle Handles Dead Locks?

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