spec_result_execute
dbExecute() always returns a
scalar
numeric
that specifies the number of rows affected
by the statement.
An error is raised when issuing a statement over a closed
or invalid connection,
if the syntax of the statement is invalid,
or if the statement is not a non-NA string.
The following argument is not part of the dbExecute() generic
(to improve compatibility across backends)
but is part of the DBI specification:
params (TBD)
They must be provided as named arguments. See the "Specification" section for details on its usage.