- sargs := make([]driver.Value, len(args))
-
- // Convert args to subset types.
- if cc, ok := si.(driver.ColumnConverter); ok {
- for n, arg := range args {
- // First, see if the value itself knows how to convert
- // itself to a driver type. For example, a NullString
- // struct changing into a string or nil.
- if svi, ok := arg.(driver.Valuer); ok {
- sv, err := svi.Value()
- if err != nil {
- return nil, fmt.Errorf("sql: argument index %d from Value: %v", n, err)
- }
- if !driver.IsValue(sv) {
- return nil, fmt.Errorf("sql: argument index %d: non-subset type %T returned from Value", n, sv)
- }
- arg = sv
- }
-
- // Second, ask the column to sanity check itself. For
- // example, drivers might use this to make sure that
- // an int64 values being inserted into a 16-bit
- // integer field is in range (before getting
- // truncated), or that a nil can't go into a NOT NULL
- // column before going across the network to get the
- // same error.
- sargs[n], err = cc.ColumnConverter(n).ConvertValue(arg)
- if err != nil {
- return nil, fmt.Errorf("sql: converting Exec argument #%d's type: %v", n, err)
- }
- if !driver.IsValue(sargs[n]) {
- return nil, fmt.Errorf("sql: driver ColumnConverter error converted %T to unsupported type %T",
- arg, sargs[n])
- }
- }
- } else {
- for n, arg := range args {
- sargs[n], err = driver.DefaultParameterConverter.ConvertValue(arg)
- if err != nil {
- return nil, fmt.Errorf("sql: converting Exec argument #%d's type: %v", n, err)
- }
- }