Oracle DB 11.2.0.4: Impossible to activate the table lock after having stopped it

Hello

I use Oracle Database 11.2.0.4.

After reading the documentation on how to prevent unwanted table DDL statement.

I found a way to do this in by issuing 'edit the table < table_name > disable table lock'.

Turn it off doesn't work, however I can not re - activate.

The error message is:

ORA-00054: resource busy and acquire with NOWAIT specified or timeout expired

I want to activate the lock, because I need to add new columns to this table.

I was digging on several threads that have the same problem as mine. But none of them gives any acceptable solution.

Impossible to activate the table lock after disablng it

ALTER table enable table lock blocking

However, a poster responds by quoting the documentation that says: (Note: I can't find what doc says)

'Specify the TABLE LOCK ACTIVATE to activate the table locking, allowing operations on the table DDL. All currently process transactions must commit or roll before Oracle database allows table locking. »


By the way:

1. the table is mine and nobody knows there are (therefore, it would be just me which undoubtedly make any DML at it, and I did not).

2. I've disabled the lock table months ago and tried to turn it back on because I want to add the new column to the table.


It means that I have to wait for that "ALL transactions running" happening on the current scheme being validated or cancelled?

The table itself is located on the stops and never schema of production on which transactions take place continuously.


Is it true that Oracle expects all execute transactions? Is it known bug?

Why would Oracle wait as all transactions which has nothing to do with the underlying table?

Is there no workaround solution to solve this?


Note:

I tried to deactivate - activate the table locking on the development database (which has less transaction) and it works fine.


Kind regards


Buntoro

Your best option might be suspended from the database. If it is an application of type OTP, it must suspend in some secinds, do your DOF, then get out. Your users should not notice. I have described the mechanism here,

Quiesce

--

John Watson

Oracle Certified Master s/n

Tags: Database

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