![]() ![]() Its not possible to manually lock a row in Oracle. Either give it the unique ID or a the rowid of what you want to lock. There's very little you can do about this, apart from not using bitmap indexes in a DML environment. the select for update will lock a single row if your select statement returns a single row. If you see the "no row" entries in the Oracle Trace AND the Create table DDL shows bitmap indexes, then this is what is causing the deadlock - this is a prime indicator that this is a bitmap index deadlock. Resource Name process session holds waits process session holds waits The following information may aid in determining the deadlock: It is a deadlock due to user error in the design of an application or from issuing incorrect ad-hoc SQL. The following deadlock is not an ORACLE error. ![]() the my application will hang at the insert sql until I commit the change from other client. Hypothetically, an analyzer could be written such that if it was given a starting SQL or PL/SQL statement, it could track all the. There is no concept of a BEGIN TRANSACTION statement in Oracle, so a static analyzer has no way of knowing what the start point of a transaction is. Both the sessions involved in deadlock showing the same sql 'DELETE FROM CLBAK'.It is a blind delete statement without any 'where' clause.How deadlock situation can occur here.It is worth mentioning here that this DELETE statement is fired only from the trigger.I just can not visualise that how in this situation the same statement causes a. Now I found whenever I insert a record into table from other client and didnt commit. Deadlocks would depend on transactions not on static code. Additional information can be collected by adding the following to the init. If the trace shows something similar to this: I wrote a application which uses jdbc to insert records into table A. If you are still having problems identifying the cause of a deadlock Oracle Support may be able to help.
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