Oracle How to get Execution Plan for SQL executed inside of PLSQL?

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The question:

Is it possible to examine the execution plan for a SQL statement executed inside a PLSQL block?

DECLARE
    l_count PLS_INTEGER;
BEGIN
    SELECT COUNT(1) INTO l_count
    FROM foo;
END;
/

For regular SQL I would normally run the following to check the execution plan:

select * from table(dbms_xplan.display_cursor(null, null, 'ALLSTATS LAST'));

However, this just reports:

NOTE: cannot fetch plan for SQL_ID: 3q0sujncq54wy, CHILD_NUMBER: 0
      Please verify value of SQL_ID and CHILD_NUMBER; 
      It could also be that the plan is no longer in cursor cache (check v$sql_plan)

The Solutions:

Below are the methods you can try. The first solution is probably the best. Try others if the first one doesn’t work. Senior developers aren’t just copying/pasting – they read the methods carefully & apply them wisely to each case.

Method 1

You can look up the sql_id And child_number in v$sql. Something like:

Select s.sql_id, s.child_number
From   V$sql s
Where  upper(sql_text) like upper('SELECT COUNT(%FROM foo')
And    Sql_text not like '%v$sql%';

Note that pl/sql normalises static SQL for you to boost cursor sharing – it will be in upper case with much less white space.

Once you’ve got these, you can just input into the dbms_xplan.display_cursor function


All methods was sourced from stackoverflow.com or stackexchange.com, is licensed under cc by-sa 2.5, cc by-sa 3.0 and cc by-sa 4.0

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