#2 sql99 CAST function

[Kamil Shamgunov]

I've noticed that there is no SQL99 CAST function in
OneDollarDB.
This makes many problems when migrating from other
SQL99 conformant databases.
Besides, this function is pretty useful in some cases.

P.S. What happened to Vivek Pandey? He hadn't replied
to my last two emails. Hope everything is fine with him.

Best regards,
Kamil Shamgunov