From ab2f66c87ad52e76140c3158319024eae3f10dd3 Mon Sep 17 00:00:00 2001
From: Tomasz Golinski <tomaszg@math.uwb.edu.pl>
Date: Tue, 1 Oct 2019 17:29:17 +0200
Subject: [PATCH] Don't generate empty SQL commands if no data is to be
 changed.

---
 ocdb.cpp | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/ocdb.cpp b/ocdb.cpp
index c01b203..6d37688 100644
--- a/ocdb.cpp
+++ b/ocdb.cpp
@@ -164,6 +164,9 @@ bool OCdb::update_cache(json j) {
 	if (j["data"]["owner"].count("uuid") > 0 && !j["data"]["owner"]["uuid"].is_null())
 		fields["owner"] = j["data"]["owner"]["uuid"].get<std::string>();
 
+	if (fields.empty() && fields2.empty())
+		return 2;
+
 	std::string sql = "INSERT INTO caches (code,";
 	for (auto& i : fields)
 		sql += i.first + ',';
@@ -220,6 +223,9 @@ bool OCdb::update_log(json j) {
 	if (j["data"].count("text") > 0 && !j["data"]["text"].is_null())
 		fields["text"] = j["data"]["text"].get<std::string>();
 
+	if (fields.empty())
+		return 2;
+
 	std::string sql = "INSERT INTO logs (uuid,";
 	for (auto& i : fields)
 		sql += i.first + ',';