VIEW.EXPLAINExplain a view's composition tree with per-leaf cardinalities.
| 语法 | VIEW.EXPLAIN name |
| 分组 | view |
| 参数个数 | 2 |
| 起始版本 | 3.0.0 |
| 标志 | readonly, extension |
| 复杂度 | O(sum over leaves of (log N + matched)) — each leaf's cardinality is a real count, so EXPLAIN on a broad leaf costs as much as counting it |
| Redis 兼容性 | kevy-only: nearest is FT.EXPLAIN, which returns a query tree rather than per-leaf cardinalities |