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POIs this a possible Oracle bug or am I missing something?
 

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  1. POIs this a possible Oracle bug or am I missing something?
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    <p>Database is Oracle 10.2.0.1.0 - 64bit running on Red Hat Enterprise Linux ES release 4 (Nahant Update 8)</p> <p>In SQL*Plus following code run perfectly:</p> <pre><code>var comment_id number exec :comment_id := 3052753 select e.label as doc_name, e.url, i.item_id, 'multi' as form_type from cr_items i, cr_extlinks e where i.parent_id = :comment_id and e.extlink_id = i.item_id UNION select null as doc_name, utl_raw.cast_to_varchar2(DBMS_LOB.SUBSTR(r.content, 2000, 1)) as url, r.item_id, 'single' as form_type from cr_revisions r where r.revision_id = content_item.get_latest_revision(:comment_id); / </code></pre> <p>In this case, it returns 2 rows, 1 from each part of the UNION. If I change the call to content_item.get_latest_revision as follows, it breaks as follows:</p> <pre><code>var comment_id number exec :comment_id := 3052753 select e.label as doc_name, e.url, i.item_id, 'multi' as form_type from cr_items i, cr_extlinks e where i.parent_id = :comment_id and e.extlink_id = i.item_id UNION select null as doc_name, utl_raw.cast_to_varchar2(DBMS_LOB.SUBSTR(r.content, 2000, 1)) as url, r.item_id, 'single' as form_type from cr_revisions r where r.revision_id = ( select content_item.get_latest_revision(:comment_id) from dual); / </code></pre> <p>The error:</p> <pre><code>SQL&gt; where r.revision_id = ( select content_item.get_latest_revision(:comment_id) from dual) * ERROR at line 14: ORA-00904: : invalid identifier </code></pre> <p>Now, what's really crazy about this piece of SQL is that the 2nd example above is the <strong>only</strong> case that breaks. For example, if I take the query in example 2 above and just remove the doc_name field from both sides of the union everything suddenly works again. Or if I remove the utl_raw.cast_to_varchar2 bit, or the union itself (and run each part separately). It's just that precise combination of UNION, AND clauses and function call that breaks. </p> <p>Somebody suggested that it might be bug 6038461, 'Wrong results from SQL with UNION and a fast DUAL subquery', but I don't think that's a good fit.</p> <p>Anyone have a clue what's up with the 2nd query?</p> <p>PS I should add that in TOAD there is no error - the queries run fine...</p>
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      1. POIs this a possible Oracle bug or am I missing something?
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    1. COAgree 6038461 doesn't look like a good match now; in the [previous question](http://stackoverflow.com/q/11155855/266304) it wasn't clear if it was erroring or giving wrong results. I'm pretty sure it's *a* bug, but can't see an exact match. You might need to raise a service request with Oracle.
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    2. COTotal shot in the dark, given that the query is running fine in TOAD, what version of SQL Plus are you using?
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    3. COYou're running an unpatched version of 10gR2. Why is that?
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