diff --git a/lib/commands/query.js b/lib/commands/query.js
index 115866ca6a..ffad6c020b 100644
--- a/lib/commands/query.js
+++ b/lib/commands/query.js
@@ -26,6 +26,7 @@ class Query extends Command {
     this._fieldCount = 0;
     this._rowParser = null;
     this._fields = [];
+    // Warning counts for SELECT queries only, does not included warning counts for DML queries.
     this._warningCounts = [];
     this._rows = [];
     this._receivedFieldsCount = 0;