// DecodeRecordKey decodes the key and gets the tableID, handle and columnID.
func DecodeRecordKey(key kv.Key) (tableID int64, handle int64, columnID int64, err error) {
k := key
if !key.HasPrefix(TablePrefix) {
return 0, 0, 0, errors.Errorf("invalid record key - %q", k)
}
key = key[len(TablePrefix):]
key, tableID, err = codec.DecodeInt(key)
if err != nil {
return 0, 0, 0, errors.Trace(err)
}
if !key.HasPrefix(recordPrefixSep) {
return 0, 0, 0, errors.Errorf("invalid record key - %q", k)
}
key = key[len(recordPrefixSep):]
key, handle, err = codec.DecodeInt(key)
if err != nil {
return 0, 0, 0, errors.Trace(err)
}
if len(key) == 0 {
return
}
key, columnID, err = codec.DecodeInt(key)
if err != nil {
return 0, 0, 0, errors.Trace(err)
}
return
}
// DecodeRowKey decodes the key and gets the handle.
func DecodeRowKey(key kv.Key) (handle int64, err error) {
k := key
if !key.HasPrefix(tablePrefix) {
return 0, errInvalidRecordKey.Gen("invalid record key - %q", k)
}
key = key[len(tablePrefix):]
// Table ID is not needed.
key, _, err = codec.DecodeInt(key)
if err != nil {
return 0, errors.Trace(err)
}
if !key.HasPrefix(recordPrefixSep) {
return 0, errInvalidRecordKey.Gen("invalid record key - %q", k)
}
key = key[len(recordPrefixSep):]
key, handle, err = codec.DecodeInt(key)
if err != nil {
return 0, errors.Trace(err)
}
return
}