The attached patch reduces the warnings in a 32 bit build with Visual Studio 2008 to a set in the flex/bison generated code. I'll handle those later. I'll add comments on some of the changes here. The libmysqld.def file: The description line isn't supported in the more recent compilers. In fsp0fsp.c, there is an explicit cast to ullint. In this case, the code does what's intended, and the compiler warning is one of the "are you sure this is right" warnings. C4334 gives a warning if you make a 1u << 10 and store that in a 64 bit variable, because you could have meant 1i64 << 10. The change in i_s.cc is the one I'm most worried about. It used to store the unsigned long long in a double. The change I did can be wrong. But even if it's not, I'm worried what happens when this runs on an existing set of tables. We had a very long discussion about the cast in row0sel.c. The conclusion was that * auto_increment on doubles or floats is a very odd case * there is a compiler bug in Visual Studio for very large values (above around 2^53 it converts doubles wrong to uint64 I'd like to separate this discussion from this patch, though, and submit a bug report on the innodb code on mysql. I assume there will be something here I should change, but if parts of the patch are ready for pushing, let me know that. Bo Thorsen. Monty Program AB. -- MariaDB: MySQL replacement Community developed. Feature enhanced. Backward compatible.