Hi all,

I have traced a problem with blobs to this function
const ColData Row::at(size_type i) const

In this function, A ColData object is constructed from c_str() of the fields data.
When the fields data contains a null character, the resulting ColData object will not contain the entire data of the field.

The problem is that ColData expects to be able to be constructed given a pointer to characters. It needs a length too because valid data can contain a null character.

There is no way to access the full data in this situation.
This function
const char* raw_data(int i) const
can let you access the data but you don't know how long it is.

I have made the following modification:

Added this to Row :

const std::string & raw_string(int i) const
{
return data_[i];
}

This solves my problem, for the moment but doesn't fix the problem,
All of the functions that return ColData from Row have truncated data.

Alex

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Alex Burton wrote:
We're aware of a whole class of problems in this area. The biggest
substantive change in the next version (whenever that happens) will be
to fix these problems.

See the current Wishlist (not the one in your tarball!) if you want to
help make that day come quicker by contributing patches:

http://svn.gna.org/viewcvs/mysqlpp/t...st?view=markup

The proper fix probably involves adding another ctor to ColData that
takes a length in addition to a char* and making the various parts of
the code use it. Note that you can't just add the length parameter to
the existing ctor, or you'll break the ABI.

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