Disconnect from the database.
#execute q executes query q and returns the result as a pair (error_code, recordlist), where a record is a string list.
#execute q
q
(error_code, recordlist)
string list
#execute_gen get_info n_rec q callback executes query q and invokes callback on successful blocks of the results (of n_rec records each).
#execute_gen get_info n_rec q callback
callback
n_rec
#execute_with_info q executes query q and returns the result as a tuple (error_code, type_list, record list), where type_list indicates the SQL types of the returned columns, and a record is a string list.
#execute_with_info q
(error_code, type_list, record list)
type_list