Unless you specify the PURGE clause, the DROP TABLE statement does not result in space being released back to the tablespace for use by other objects, and the space continues to count toward the user’s space quota. Use the PURGE statement to remove a table or index from your recycle bin and release all of the space associated with the object, or to remove the entire recycle bin, or to remove part of all of a dropped tablespace from the recycle bin. Use the PURGE statement to remove a table or index from your recycle bin and release all of the space associated with the object, or to remove the entire recycle bin, or to remove part of all of a dropped tablespace from the recycle bin. Oracle Database Administrator’s Guide for information on the recycle bin and naming conventions for objects in the recycle bin. After you drop the table Oracle will return an error:.
Oracle 10g has a recycle bin, kind of a retirement home for old and dropped tables. The recycle bin where dropped tables go is purged by Oracle from time to time based on a number of different criteria. You can recover a table that you have dropped from the Oracle recycle bin by using the flashback table command as seen here:. The recycle binis a new feature in Oracle 10g which keeps dropped objects. Syntax. The syntax for the Oracle DROP TABLE statement is: DROP TABLE schema_name.table_name CASCADE CONSTRAINTS PURGE;
Drop table SS64 purge;. Disable the recyclebin for this session:. In Oracle 10g and later, how do I recover a dropped database table? To reclaim tablespace, use flashback to restore tables, or use purge to clear them from recyclebin; for example:. Quick Oracle Question: If I have a huge table and I want it to be gone,destroyed, zilch nada. Pre Oracle 10G:drop table WHATEVER cascade constraints; 10g onwards:drop table WHATEVER cascade constraints purge; — Cheers,Norm. What’s the fastest way to get rid of it? Pre Oracle 10G:drop table WHATEVER cascade constraints; 10g onwards:drop table WHATEVER cascade constraints purge;
Oracle Drop Table Tips
If any table in Oracle 10g is dropped then any associated objects to this table such as indexes, constraints and other dependant objects are simply renamed with a prefix of BIN. But with Oracle 10g Recycle bin Feature the user can easily restore the Dropped Object. SQL PURGE TABLESPACE Table Space Name;. One of the many new features that Oracle 10g introduced is the recyclebin. Unless you purge them, Oracle will leave objects in the recyclebin until the tablespace runs out of space, or until you hit your user quota on the tablespace. If table EMP was created in the USERS tablespace, the dropped table EMP remains in the USERS tablespace. Dropped tables and any associated objects such as indexes, constraints, nested tables, and other dependant objects are not moved, they are simply renamed with a prefix of BIN. The recyclebin is enabled, by default, from Oracle 10g. But you can turn it on or off with the RECYCLEBIN initialization parameter, at the system or session level. If you want to purge objects of logon user give the following command. Long story short Create table, add some data, drop table with standard drop command with no purge at the end and table does not go to recycle bin and hence can’t use the flashback command to retreive it. The following expert is from found in 10g Backup and Recovery Basics (strange place, I know) in a section called Limitations and Restrictions on Flashback Drop:.
Note: If you accidentally drop a table on Oracle 10g or later, you may be able to recover it from the recycle bin. Purge. Bypasses the recycle bin and completely drops the table. Purged tables cannot be recovered. As of Oracle 10g, when a table is dropped it is moved into the recycle bin unless the PURGE modifier is used. If the PURGE modifier is used then the table is dropped completely from the database and is unrecoverable. DROP TABLE customers2 PURGE; Using the PURGE clause is equivalent to first dropping the table and from DBST 651 at MD University College. Creating and Managing Tables and Constraints in Oracle Database 10g. If your database version is above 10g, and the recyclebin is enable, you can just simply use recyclebin feature to UNDO the dropped table.
Before oracle 10g if you accidentally dropped a table, the only option to recover that table was incomplete database recovery provided that you have all the required backups. In 10g, it has evolved significantly with the introduction of flashback table and even flashback database. To flashback a dropped table, all that is required is the privilege that enabled us to drop the table in the first place. If we do not wish to preserve the table in the recycle bin, we can permanently drop it by adding the PURGE keyword to the end of the DDL.