Oracle SQL: Understanding the behavior of SYS_GUID() when present in an inline view?

Question

Here is the example SQL in question; The SQL should run on any Oracle DBMS (I\'m running 11.2.0.2.0).

Note how the UUID values are different (one has 898 the other

Answer 1

Very interesting.

We can use the materialize hint to fix it to.

WITH data AS (SELECT /*+materialize*/SYS_GUID () uuid FROM DUAL)
    SELECT uuid, uuid
      FROM data;

1   F9440E2613761EC8E0431206460A934C    F9440E2613761EC8E0431206460A934C

From my point of view, if we can change the result of a query just by adding a hint, there is an Oracle bug. Maybe we have to ask metalink to check it...