Set data mappings between an DBMS and R.Source:
This generic is deprecated since no working implementation was ever produced.
An object inheriting from DBIResult.
a field description object as returned by
Other arguments passed on to methods.
Sets one or more conversion functions to handle the translation of DBMS data types to R objects. This is only needed for non-primitive data, since all DBI drivers handle the common base types (integers, numeric, strings, etc.)
The details on conversion functions (e.g., arguments, whether they can invoke initializers and/or destructors) have not been specified.