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    <p>My guess is that the problem is related to privileges not the version of Oracle. Are privileges on <code>DestUser</code> granted to <code>SrcUser</code> via a role in one database and via direct grants in the other? </p> <p>Before running the anonymous PL/SQL block, what happens if you disable roles first?</p> <pre><code>set role none; &lt;&lt;run the anonymous PL/SQL block&gt;&gt; </code></pre> <p>If you add instrumentation to the code, does the query against <code>all_tables</code> return the set of tables that you expect? My guess is that when the code fails, it is in a definer's rights stored procedure where the owner of the procedure has access to the <code>DestUser</code> tables via a role. Since privileges granted through a role are not visible in a definer's rights stored procedure, this would cause the <code>SELECT</code> statement in your loop to return 0 rows (though running the same query interactively would return the rows you expect). If the privileges on the <code>DestUser</code> tables are granted directly, on the other hand, the same definer's rights stored procedure would run successfully. And it would work in an anonymous PL/SQL block.</p>
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    1. USJustin Cave
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    1. COI'll check any roles etc, but in all cases the grants are direct rather than by role. What puzzles me is why one person gets 0 rows yet another gets 1 row on the 10g server. Both are using the same login and therefore have the same privileges. I'll try disabling the roles and report back. The query against all_tables returns exactly what I expect in isolation which is why I do not understand how it can vary between computers and servers.
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      1. USSteve Pettifer
    2. COOK, as you suggested I've tried disabling all roles before running the anonymous block on both servers and sure enough the result is what you suggested too: set roles none => the anonymous block does nothing and running the select on it's own produces no results. I'm forced to conclude that we have an inconsistency in our set up between the two servers so if I want to persist with this I'll need to investigate how we have roles working on our (and our customer) servers. Shame, much neater solution than an array of tables names!!
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      1. USSteve Pettifer
    3. COThanks to pressures of development schedules this will have to continue as an academic aside, but worryingly our users (SourceUser and DestUser) are granted the DBA role which I would have thought would be sufficient but perhaps SPs are executed under the authority of some other system user. Not being an Oracle DBA I'm a little in over my head at this point but will continue to read up about it. Many thanks for your help though.
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