class SQLite3::Database

def create_function name, arity, text_rep=Constants::TextRep::UTF8, &block

puts db.get_first_value( "select maim(name) from table" )

end
end
func.result = value.split(//).sort.join
else
func.result = nil
if value.nil?
db.create_function( "maim", 1 ) do |func, value|

Example:

indicate the return value that way.
the FunctionProxy#result= method on the +func+ parameter and
The block does not return a value directly. Instead, it will invoke

arguments it needs (up to its arity).
instance that wraps this function invocation--and any other
The block should accept at least one parameter--the FunctionProxy

-1 for the arity.)
+name+, with the given +arity+. (For variable arity functions, use
Creates a new function for use in SQL statements. It will be added as 
def create_function name, arity, text_rep=Constants::TextRep::UTF8, &block
  define_function_with_flags(name, text_rep) do |*args|
    fp = FunctionProxy.new
    block.call(fp, *args)
    fp.result
  end
  self
end