> On March 13, 2014, 3:52 p.m., Mark Michelson wrote:
> > Excellent job fixing the problem!
> > 
> > A note to whoever ends up committing this: This bug also exists in 1.8, 12, 
> > and trunk. The 1.8 fix is exactly the same as this one. The 12 and trunk 
> > fixes will be slightly different since the update_odbc() callback takes an 
> > ast_variable list instead of va_args. The fix is still very similar though.
> 
> zvision wrote:
>     I think this patch could rise some regression issues. While for 
> PostgreSQL backend it is perfectly fine, for MySQL it can change the current 
> behavior.
>     With MySQL backend, setting an integer column to an empty string will 
> result in storing a zero integer value - with this patch, if the column is 
> nullable,
>     it will store a NULL value instead.
>     Maybe it is not a big deal, but some third-party applications reading 
> MySQL database may start finding unexpected NULL values instead of zeros.

> I think this patch could rise some regression issues.

Very true. That should not be taken lightly.


- wdoekes


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On March 14, 2014, 4:32 p.m., zvision wrote:
> 
> -----------------------------------------------------------
> This is an automatically generated e-mail. To reply, visit:
> https://reviewboard.asterisk.org/r/3335/
> -----------------------------------------------------------
> 
> (Updated March 14, 2014, 4:32 p.m.)
> 
> 
> Review request for Asterisk Developers.
> 
> 
> Bugs: ASTERISK-23459
>     https://issues.asterisk.org/jira/browse/ASTERISK-23459
> 
> 
> Repository: Asterisk
> 
> 
> Description
> -------
> 
> This patch fixes setting nullable integer columns to NULL instead of an empty 
> string, which fails for PostgreSQL, for example.
> The current code is supposed to do so, but the check is broken. The patch 
> also allows the first column in the list to be a nullable integer.
> Also, the check for existence of a mandatory column checked for the first 
> column in the list instead of the key field lookup column.
> 
> 
> Diffs
> -----
> 
>   http://svn.asterisk.org/svn/asterisk/branches/12/res/res_config_odbc.c 
> 410554 
> 
> Diff: https://reviewboard.asterisk.org/r/3335/diff/
> 
> 
> Testing
> -------
> 
> Tested by me. Use case scenario: Asterisk + res_odbc + PostgreSQL backend, 
> SIP realtime peers + regs.
> When a 'port' column in SIP regs (I assume this also applies when using 
> sippeers only) is a nullable integer,
> Asterisk tries to write an empty string here during SIP endpoint 
> deregistration.
> 
> 
> Thanks,
> 
> zvision
> 
>

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