spec_meta_get_rows_affected
dbGetRowsAffected() returns a scalar number (integer or numeric),
the number of rows affected by a data manipulation statement
issued with dbSendStatement().
The value is available directly after the call
and does not change after calling dbFetch().
For queries issued with dbSendQuery(),
zero is returned before
and after the call to dbFetch().
Attempting to get the rows affected for a result set cleared with
dbClearResult() gives an error.
Other meta specifications:
spec_get_info,
spec_meta_bind,
spec_meta_column_info,
spec_meta_get_row_count,
spec_meta_get_statement,
spec_meta_has_completed,
spec_meta_is_valid