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- ORACLE KILL SESSION IS NOT VALID CODE
- ORACLE KILL SESSION IS NOT VALID LICENSE
- ORACLE KILL SESSION IS NOT VALID WINDOWS
Note that Tanel's method is probably able to cancel queries that this approach cannot cancel because the URGENT signal handler under Unix effectively causes an interrupt to the running process executing the corresponding handler code whereas the event set here has to be actively checked by the code of the running process.Select blocking_session,blocked_session,script from
ORACLE KILL SESSION IS NOT VALID WINDOWS
It is particularly useful in Windows environments where the SQL*Plus executable by default doesn't allow cancelling a current execution by pressing Control+C - it works only while fetching or pressing it a second time, terminating the whole SQL*Plus client. However this means that more than a single statement potentially
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Avoids burning CPU and potential contention by this loop Raise_application_error(-20001, 'SID: ' || v_sid || ' still active after ' || n_timeout || ' seconds') If dt_start + (n_timeout / 86400) < sysdate then Session still active after timeout exceeded then set event level to 0 to avoid further cancels Raise_application_error(-20001, 'SID: ' || v_sid || ' no longer found after cancelling') Set event 10237 to level 1 in session to simulate CONTROL+C Raise_application_error(-20001, 'SID: &1 cannot be found or is not in STATUS=ACTIVE') V_serial number := to_number('&v_serial') Avoid compilation errors in case of SID not found See Tanel Poder's blog post for more infoĬolumn serial# new_value v_serial noprint This doesn't work with Windows SQL*Plus clients though When running on Unix KILL -URG sent to the server process sys.dbms_resource_manager.switch_consumer_group_for_sess( Note that the official documentation doesn't explicitly mention CANCEL_SQL as ORA-29366 and it doesn't work as described and enabled Resource Manager in a documented way The following code is supposed to achieve the same on Enterprise Edition test this before using it on anything important Provided for free, without any warranties. The usage of that event is undocumented which means that it can't be killed this If the session is stuck on the server side a remote session without killing the session Allows to cancel a running SQL statement from Sets event 10237 in a session to simulate So a simple script like the following should be sufficient to cancel a current execution in another session without the need to kill the session. If you set event 10237 ("ORA-10237: simulate ^C (for testing purposes)") in a session to any level greater 0 then any currently running and future execution will be "cancelled", so once the cancellation was successful the event needs to be unset otherwise the session will be in an unusable state cancelling any further attempts (applies even if the "lifetime 1" clause is used instead of "forever" when using ORADEBUG to set the event).
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ORACLE KILL SESSION IS NOT VALID LICENSE
So ideally there should be an approach that is independent from client or server O/S or license details, and indeed there is one, however it is using an undocumented event and therefore is unsupported and can only be used at your own risk. In my quick tests however the call to DBMS_RESOURCE_MANAGER.SWITCH_CONSUMER_GROUP_FOR_SESS using "CANCEL_SQL" as consumer group only errors out with ORA-29366 saying that the specified consumer group is invalid. In Tanel's article it is also mentioned that there is an officially documented way of doing this via the Resource Manager if you happen to have an Enterprise Edition license. Tanel has specifically covered the handling of "urgent" TCP packets and how this could be used to signal a "cancel" to another process, however this only works on Unix environments and not with Windows SQL*Plus clients. This is not really anything new - in fact Tanel Poder has already blogged about it a while ago.