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INTERVIEW QUESTIONS DATABASE STORED PROCEDURES DETAILS
Question :
Can we use commit inside the trigger? If not then how can we save the transxaction made by the trigger?

Posted by: DINESH on 11/27/2012

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Category Stored Procedures Interview Questions
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Added on 11/27/2012
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Answers:

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Using pragma concept.
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Posted by: Nibedita Ray

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Cannot perform commit or rollback because they are part of triggering sql statements hence don't need to save the transaction by trigger.
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Posted by: Shubhra

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We cann't use TCL statement(commit,rollback, savepoint) in a trigger. But We can use it on stored pl/sql block means procedure. So we can call procedure from a trigger with "CALL" method.
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Posted by: Nitesh Kumar

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Using pragma autonomous_transaction, We can use TCL (Commit) in Triggers. Example as follows.<br><br>create or replace trigger at_trg<br>after insert<br>on emp<br>for each row<br>Declare<br>pragma autonomous_transaction;<br>begin<br>insert into bonus(ename,job,sal) <br> values(:new.ename,:new.job,:new.sal);<br>commit;<br>end;<br><br>SQL> insert into emp(empno,ename,job,sal,comm) <br>values(1000,'krishna','faculty',5000,200);<br><br>Result:-1 row created.<br>
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Posted by: Vani

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Answer already given.PRAGMA is the pre compiler directives.it gives instruction to the compiler how to use commit in a autonomous transaction.
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Posted by: Nibedita Ray

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