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Don Burleson Blog 







ORA-14552: Cannot Perform a DDL Commit or Rollback Inside a Query or DML tips

Oracle Database Tips by Donald BurlesonJune 29, 2015

Question:  :  I am running a PL/SQL function with a commit, and I am getting this ORA-14552 error:

ORA-14552: Cannot Perform a DDL Commit or Rollback Inside a Query or DML

How do I avoid this ORA-14552 error?  Is it safe to make my function contain an autonomous transaction?

Answer: :  To diagnose the ORA-14552 error, we use the oerr utility  to look up the ORA-14552 error message, cause and action:

ORA-14552: cannot perform a DDL, commit or rollback inside a query or DML

Cause: DDL operations like creation tables, views etc. and transaction control statements such as commit/rollback cannot be performed inside a query or a DML statement.

Action: Ensure that the offending operation is not performed or use autonomous transactions to perform the operation within the query/DML operation.

In your case, you are getting the ORA-14552 error because you are issuing a commit.

 If you must use a commit, you can avoid the ORA-14452 error by making your function into an autonomous transaction using "PRAGMA AUTONOMOUS_TRANSACTION;" in the function:

   return number  
   v_loc number;

      pragma autonomous_transaction;

   begin . . .  

See these notes on using autonomous transactions.

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