From dde8dff73fd814910b317df2beb84b88d5659d37 Mon Sep 17 00:00:00 2001
From: antirez <antirez@gmail.com>
Date: Mon, 14 Apr 2014 19:35:00 +0200
Subject: [PATCH] PFDEBUG ENCODING added.

---
 src/hyperloglog.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/hyperloglog.c b/src/hyperloglog.c
index f5df8fc31..393cc418d 100644
--- a/src/hyperloglog.c
+++ b/src/hyperloglog.c
@@ -1396,6 +1396,13 @@ void pfdebugCommand(redisClient *c) {
         decoded = sdstrim(decoded," ");
         addReplyBulkCBuffer(c,decoded,sdslen(decoded));
         sdsfree(decoded);
+    }
+    /* PFDEBUG ENCODING <key> */
+    else if (!strcasecmp(cmd,"encoding")) {
+        char *encodingstr[2] = {"dense","sparse"};
+        if (c->argc != 3) goto arityerr;
+
+        addReplyStatus(c,encodingstr[hdr->encoding]);
     } else {
         addReplyErrorFormat(c,"Unknown PFDEBUG subcommand '%s'", cmd);
     }