Lock whole query due to POCO can not run in parallel

chdb-io · Jun 24, 2024 · 62626e9 · 62626e9
1 parent c1ad28d
commit 62626e9
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diff --git a/programs/local/LocalChdb.cpp b/programs/local/LocalChdb.cpp
@@ -38,6 +38,7 @@ local_result_v2 * queryToBuffer(
         // Add path string
         argv.push_back("--path=" + path);
     }
+    // argv.push_back("--no-system-tables");
     // Add query string
     argv.push_back("--query=" + queryStr);
 

diff --git a/programs/local/LocalServer.cpp b/programs/local/LocalServer.cpp
@@ -1050,10 +1050,14 @@ class query_result_
 };
 
 
+// global mutex for all local servers
+static std::mutex CHDB_MUTEX;
+
 std::unique_ptr<query_result_> pyEntryClickHouseLocal(int argc, char ** argv)
 {
     try
     {
+        std::lock_guard<std::mutex> lock(CHDB_MUTEX);
         DB::LocalServer app;
         app.init(argc, argv);
         int ret = app.run();