IDX.EXPLAIN
The IDX.QUERY parse without the execution: kind, state, est_rows, and the plan line.
IDX.EXPLAIN name RANGE min max|EQ value|MATCH text|KNN vector|GROUPS [args ...]Complexity
The plan is parse-only, but est_rows costs the same live stats walk as IDX.LIST
Complexity and compatibility are read out of kevy's implementation, not copied from Redis's reference. Several genuinely differ.
Redis compatibility
kevy only
kevy has this; Redis does not. nearest is FT.EXPLAIN, which returns a parsed query tree; ours returns kind, build state, estimated rows and a one-line plan
See also
IDX.COUNTIDX.CREATEIDX.DROPIDX.LISTIDX.QUERYIDX.REBUILDIDX.VERIFY