XADDAppend an entry to a stream, with optional trim.
| 構文 | XADD key [NOMKSTREAM] [MAXLEN [=|~] threshold | MINID [=|~] id] id|* field value [field value ...] |
| グループ | stream |
| 引数の数 | -5 |
| 導入バージョン | 1.0.0 |
| フラグ | write |
| 計算量 | O(log N) to insert; O(N*F) whenever a MAXLEN / MINID clause actually evicts, because the trim triggers a full weight recompute |
| Redis 互換性 | differs: the approximate-trim '~' is accepted for wire compatibility but always trims exactly, and the LIMIT clause is not parsed |