From 61c6d7dd930ca60ac7a92b92b14742972a04e162 Mon Sep 17 00:00:00 2001
From: Julian Grinblat <julian@dotcore.co.il>
Date: Mon, 13 May 2024 23:54:56 +0900
Subject: [PATCH] fix: case where there are zero matched keys (#191)

---
 src/pdel.lua              | 8 ++++++--
 test/integration/index.js | 2 ++
 2 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/pdel.lua b/src/pdel.lua
index a159a14..db36c45 100644
--- a/src/pdel.lua
+++ b/src/pdel.lua
@@ -8,12 +8,16 @@ if type(redis.replicate_commands) == "function" and redis.replicate_commands() t
 	repeat
 		cursor, keys = unpack(redis.call("SCAN", cursor, "MATCH", KEYS[1]))
 		count = count + #keys
-		redis.call("DEL", unpack(keys))
+		if #keys > 0 then
+			redis.call("DEL", unpack(keys))
+		end
 	until cursor == "0"
 
 	return count
 else
 	local keys = redis.call("KEYS", KEYS[1])
-	redis.call("DEL", unpack(keys))
+	if #keys > 0 then
+		redis.call("DEL", unpack(keys))
+	end
 	return #keys
 end
diff --git a/test/integration/index.js b/test/integration/index.js
index abd82b2..6471898 100644
--- a/test/integration/index.js
+++ b/test/integration/index.js
@@ -44,4 +44,6 @@ describe('integration', () => {
       'bar:2',
     ])).to.become([null, null, 'val', 'val']); // eslint-disable-line unicorn/no-null
   });
+
+  it('should delete zero keys', () => expect(redis.pdel('foo:*')).to.become(0));
 });