[fdo-dev] FDO172 & Warning of "build breaker" changes

Mateusz Loskot mateusz at loskot.net
Tue Sep 26 10:07:51 EDT 2006

Frank Warmerdam wrote:
> Folks,
> On a related point, I'm not sure how to implement 
> ISChemaCapabilities::GetMaximumDataValueLength().
> Is this method just used when creating new fields?  I see the shape 
> provider returns -1 for some field types.  Does this imply unlimited 
> or unsupported?

According to my understanding, -1 means that the data type is variable
length with no limitation or no known limitation or with only
architecture / system related limitation like size of file or length of
field in DBMS table.

> For my raster provider the upper size of a BLOB is in theory 2^63 or 
> so.  Should I return that?

I think so.

Mateusz Loskot

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