diff --git a/source/libs/parser/src/parInsertSml.c b/source/libs/parser/src/parInsertSml.c
index 106ee641af9b2c9688654cd1100b80a22c40612c..0bcd777d2a4bd332a146e6cceb1bb464cdbbe573 100644
--- a/source/libs/parser/src/parInsertSml.c
+++ b/source/libs/parser/src/parInsertSml.c
@@ -25,6 +25,8 @@ static void clearColValArray(SArray* pCols) {
     if (TSDB_DATA_TYPE_NCHAR == pCol->type) {
       taosMemoryFreeClear(pCol->value.pData);
     }
+    pCol->flag = CV_FLAG_NONE;
+    pCol->value.val = 0;
   }
 }
 
diff --git a/utils/test/c/sml_test.c b/utils/test/c/sml_test.c
index 44fbd060bee9aaec14d6467630815837cc32b6e9..b0cc6f749cb703c601235a3aaf444ce169149057 100644
--- a/utils/test/c/sml_test.c
+++ b/utils/test/c/sml_test.c
@@ -939,6 +939,9 @@ int sml_ts2164_Test() {
       //      "meters,location=la,groupid=ca current=11.8,voltage=221,phase=0.27",
       "meters,location=la,groupid=ca current=11.8,voltage=221",
       "meters,location=la,groupid=ca current=11.8,voltage=221,phase=0.27",
+      "ts3038,location=l2a,groupid=ca current=L\"11.8\"",
+      "ts3038,location=l2a,groupid=ca voltage=L\"221\"",
+      "ts3038,location=l2a,groupid=ca phase=L\"221\"",
       //      "meters,location=la,groupid=cb current=11.8,voltage=221,phase=0.27",
   };