[JIRA] Resolved: (CAROB-47) error retrieving null value from a driverResultSet with getString

     [ https://forge.continuent.org/jira/browse/CAROB-47?page=all ]
     
Gilles Rayrat resolved CAROB-47:
--------------------------------

     Resolution: Fixed
    Fix Version: V1.0 - full version

return NULL changed to return L""
We should discuss whether to throw a "NullValueException" here in order to 
prevent user from testing wasNull for each result

> error retrieving null value from a driverResultSet with getString
> -----------------------------------------------------------------
>
>          Key: CAROB-47
>          URL: https://forge.continuent.org/jira/browse/CAROB-47
>      Project: Carob
>         Type: Bug
>   Components: C++ API
>  Environment: Paldo linux x86
> IBM laptop R51 - 512MB memory
> Sequoia 2.4 beta - backend mysql 5.0
>     Reporter: Zsolt Simon
>     Assignee: Gilles Rayrat
>     Priority: Minor
>      Fix For: V1.0 - full version

>
>
> When executing the above specified commands, an exception is thrown:
> terminate called after throwing an instance of 'std::logic_error'
>   what():  basic_string::_S_construct NULL not valid
> The code fragment where this happening:
> wstring DriverResultSet::getString(int32_t columnIndex) throw (SQLException,
>     UnexpectedException)
> {
>   checkRowAndColPosAndSetNullFlag(columnIndex);
>   if (wasNullFlag)
>     return NULL; <---- exception is thrown here
> wstring can't be initialized with NULL.
> Needs another logic for this function to signal NULL values.

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