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Re: A fix for MDEV-5689 ExtractValue(xml, 'substring(/x, /y)') crashes
On Mar 20, Alexander Barkov wrote:
> On 03/19/2014 12:03 AM, Sergei Golubchik wrote:
> > On Feb 20, Alexander Barkov wrote:
> >> please review a fix for MDEV-5689.
> >> It also fixes
> >> MDEV-5709 ExtractValue() with XPath variable references returns wrong
> >> result.
> >> + String m_parsed_buf; // Array of MY_XML_NODEs, pointing to raw_buffer
> > How's that an "Array of MY_XML_NODEs", if it's just a String?
> > Ok. I'm confused. In some places it looks like m_parsed_buf is, indeed,
> > an array of MY_XML_NODEs. In other places it looks like it's a string.
> > How comes?
> It's always a dynamic array of MY_XML_NODEs, which
> just uses String as a dynamic storage.
> It's never used as a "normal" string.
> There is one exception though: m_parsed_bug.charset()
> is used to store character set of the entire XML value,
> to make MY_XPATH aware of the character set of the XML value.
> It could be stored in a structure of
> "DYNAMIC_ARRAY + CHARSET_INFO" instead.
> But that will need a bigger patch.
Okay. While it'd be a nice chance, I agree that it's outside of the
scope of this bug fix.