Hi @moigagoo I've also had some trouble with NULL values. My question can be found in this thread: [4320](https://forum.nim-lang.org/t/4320)
I ended using the library here [nim_sqlbuilder](https://github.com/ThomasTJdev/nim_sqlbuilder), which substitute a type with `= NULL`. @mashingan also provided a [good solution](https://forum.nim-lang.org/t/4320#26937) using options in the forum thread. There's also a [github issue](https://github.com/nim-lang/Nim/issues/9453) about the missing API to precompile the query and the bind the data later, which @mikra01 is working on.
