fix(keylessCommands): Add list of keyless commands

Add list of keyless Commands based on the Commands output
for redis 8

Author: ndyakov

command.go

@@ -17,6 +17,64 @@ import (
 	"github.com/redis/go-redis/v9/internal/util"
 )
 
+// keylessCommands contains Redis commands that have empty key specifications (9th slot empty)
+// Only includes core Redis commands, excludes FT.*, ts.*, timeseries.*, search.* and subcommands
+var keylessCommands = map[string]struct{}{
+	"acl":                           {},
+	"asking":                        {},
+	"auth":                          {},
+	"bgrewriteaof":                  {},
+	"bgsave":                        {},
+	"client":                        {},
+	"cluster":                       {},
+	"config":                        {},
+	"debug":                         {},
+	"discard":                       {},
+	"echo":                          {},
+	"exec":                          {},
+	"failover":                      {},
+	"function":                      {},
+	"hello":                         {},
+	"latency":                       {},
+	"lolwut":                        {},
+	"memory":                        {},
+	"module":                        {},
+	"monitor":                       {},
+	"multi":                         {},
+	"nondeterministic_output":       {},
+	"nondeterministic_output_order": {},
+	"object":                        {},
+	"pfselftest":                    {},
+	"ping":                          {},
+	"psubscribe":                    {},
+	"psync":                         {},
+	"publish":                       {},
+	"pubsub":                        {},
+	"punsubscribe":                  {},
+	"quit":                          {},
+	"readonly":                      {},
+	"readwrite":                     {},
+	"replconf":                      {},
+	"replicaof":                     {},
+	"request_policy:all_nodes":      {},
+	"request_policy:all_shards":     {},
+	"reset":                         {},
+	"role":                          {},
+	"save":                          {},
+	"script":                        {},
+	"select":                        {},
+	"shutdown":                      {},
+	"slaveof":                       {},
+	"slowlog":                       {},
+	"subscribe":                     {},
+	"swapdb":                        {},
+	"sync":                          {},
+	"unsubscribe":                   {},
+	"unwatch":                       {},
+	"xgroup":                        {},
+	"xinfo":                         {},
+}
+
 type Cmder interface {
 	// command name.
 	// e.g. "set k v ex 10" -> "set", "cluster info" -> "cluster".
@@ -83,9 +141,14 @@ func cmdFirstKeyPos(cmd Cmder) int {
 		return int(pos)
 	}
 
-	switch cmd.Name() {
-	case "echo", "ping", "command":
+	name := cmd.Name()
+
+	// first check if the command is keyless
+	if _, ok := keylessCommands[name]; ok {
 		return 0
+	}
+
+	switch name {
 	case "eval", "evalsha", "eval_ro", "evalsha_ro":
 		if cmd.stringArg(2) != "0" {
 			return 3