Exists condition in APEX 4.0

Hi
I've created an application in APEX 3.2 and I've now installed it in an APEX 4.0 environment. I've had a few issues where things have changed, but I've just hit a rather bigger problem to do with the Exisits condition that I'm hoping someone can shed some light on.
On numerous items, regions, lists items etc. I've used the "Exists (SQL query returns at least one row)" condition. In Expression 1 I've included a select statement which ends with a semi-colon. For example,
SELECT 1
FROM   my_table
WHERE id = :P0_ID
AND    my_col = 'Y';Now in APEX 4.0 I sometimes get an error when running the application which is ORA-00911: invalid character. This happens when viewing a list which has this condition on one of it's items, but doesn't appear to happen on regions with this condition. However, if I update any item, region, list item etc. which has this type of condition when I hit Apply Changes I get the same error. If I remove the semi-colon then the error disappears. For the above example, Expression 1 needs to be changed to:
SELECT 1
FROM   my_table
WHERE id = :P0_ID
AND    my_col = 'Y'I've checked the Release Notes for 4.0, the Patch Set Notes for 4.0.1 and searched this forum but I've found no reference to this. (Perhaps I'm searching for the wrong thing.)
Is this a planned change? Has anyone else experienced this? Does it only happen in certain places? I don't particularly want to go through all 20 of the APEX repositiory tables that have the Condition Type column to try and identify all the places I've used this and then change all my applications. This will be extremely time consuming, so if I know that it's a change in say only 5 places then I'll just target those places.
Many thanks for any help on this.
Sara

Hi Sara,
in previous versions of APEX we where more tolerant in regards to adding a semi-colon at the end of a SQL statement where it actually doesn't belong to. A semi-colon only has to be entered for PL/SQL commands or SQL statements within a PL/SQL code block, but never for a single SQL statement as in the case of "Exists" or an Interactive Report query. In 4.0 we have now added design time validations of SQL statements and PL/SQL code in conditions as well. Before it was stored unverified. That's why you are now hitting the problem each time you modify such a component.
I don't think that we actually changed the runtime engine to be as restrictive as the Builder validation yet, but going forward that might be the case as well in future versions of APEX. Regarding your specific problem for list entry conditions, I don't see that the code has really changed here. It's using the same function to evaluate the condition as we use for regions and a quick test also proves that list entry conditions still accept the semi-colon.
But I will file a bug for the new "Advisor" feature that it should also flag those components which are using a SQL statement with a semi-colon. That should help to easily identify there components where a change should be made.
Regards
Patrick
My Blog: http://www.inside-oracle-apex.com
APEX 4.0 Plug-Ins: http://apex.oracle.com/plugins
Twitter: http://www.twitter.com/patrickwolf

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Edited by: Danny on 25/04/2012 20:07

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that's interesting. I just had a look what happens when you use an EXISTS or NOT EXISTS condition type. The following final SQL statement will be generated with your above example. You can also see that if you run your application in debug mode.
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I wonder why this should have worked in previous versions, but I can only suspect that in the past we may just have executed
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We try to be backward compatible as much as possible, but I doubt that we will change that back to the way it was before because of the performance penalty 99.9% of our customers would face.
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My Blog: http://www.inside-oracle-apex.com
APEX Plug-Ins: http://apex.oracle.com/plugins
Twitter: http://www.twitter.com/patrickwolf

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check the following link
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mr.Rajendra
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Hello Chris,
>
user4023958 wrote:
I am relatively new to the product but am picking up things all the time. I was recently asked to create a confirmation on submit dialog which I did quite easily using javascript:apex.confirm. I was then asked to only display the confirmation message if a comment column was empty. The column is optional but it is preferred if something is added. I am using 4.1.1. Is this possible? Any ideas would be appreciated.
>
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In order to get accurate/appropriate response you should include relevant details from following information with your question:
<ul>
<li>Full APEX version</li>
<li>Full Database version</li>
<li>APEX Web server architecture (EPG, OHS or APEX listener)</li>
<li>Browser(s) and version(s) used</li>
<li>Operating system with version, architecture(32/64)</li>
<li>Theme</li>
<li>Template(s)</li>
<li>Region/item type(s)</li>
</ul>
The above information will help the forum members to ascertain the problem context and post most relevant response.
Please read the [url https://wikis.oracle.com/display/Forums/Forums+FAQ]FAQ and [url https://forums.oracle.com/forums/ann.jspa?annID=1324]forum instructions for more information on using OTN forums effectively.
Please update your forum profile with a real handle instead of user4023958.
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