Am Dienstag, 9. Oktober 2012 19:49:17 UTC+2 schrieb "David Johnston":
> Hi,
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>
>
> See below for my thoughts on how this is limited and inefficient.
>
...
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> This patch appears to throw the exception when an unquoted identifier
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> includes a dollar-sign. I cannot speak to the standard but it would seem
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> that presence of the dollar-sign should only be evaluated if we are
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> "IN_SQLCODE" and the preceding character is NOT (alphanumeric or underscore)
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> {specifically whatever characters are allowed to begin an unquoted
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> identifier}.
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>
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> Also, with the logic provided the addition of an exception and a try/catch
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> block appears to add unnecessary overhead. At the point the exception is
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> thrown I would suggest that we instead:
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>
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> "return p_sql;"
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>
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> and let the replaceProcessing method remain ignorant of whether the SQL it
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> is getting back is the original SQL or a modified version.
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>
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> The fact is the presence of dollar-quoting with enabled escaping is going to
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> be the common situation. Combine that with the fact we are not prompting
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> the user to "fix" anything means that using the exception mechanism a poor
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> choice - it is not Exceptional but rather ordinary. Everything that needs
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> to be checked and confirmed can be done in the parseSQL method and since it
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> has access to the original statement it can return the original when
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> necessary.
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>
>
> David J.
Hi,
I know that throwing that exception is a bit... uncommon. But I did that because of the while loop in
replaceProcessing.The code there does call parseSql several times, at least it can. And therefor I don't know if it is
thefirst call when i found a dollar quote. If i just return the sql unchanged it might have had changes before so the
resultwould be replaced sql code together with original sql code.
What I wanted to achieve was that replaceProcessing get's to know that there is a dollar quote and stop the
replaceProcessingand return the original sql string (just like replaceProcessingEnabled would have been set to false).
Iwanted to have a kind of stateful exit of the parseSql method. But since it only returns an int value, and might have
beencalled before, throwing an exception was the only thing I found to be able to do that.