IDX.EXPLAINThe IDX.QUERY parse without the execution: kind, state, est_rows, and the plan line.
| Syntax | IDX.EXPLAIN name RANGE min max|EQ value|MATCH text|KNN vector|GROUPS [args ...] |
| Group | index |
| Arity | -2 |
| Since | 3.0.0 |
| Flags | readonly, extension |
| Complexity | The plan is parse-only, but est_rows costs the same live stats walk as IDX.LIST |
| Redis compatibility | kevy-only: nearest is FT.EXPLAIN, which returns a parsed query tree; ours returns kind, build state, estimated rows and a one-line plan |