diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 6100ec9b8d7bc69752d4a94edc21ed07643af4c9..fea02900fb4f0b58a0fbcf355304c6ee474dd6cc 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -4531,6 +4531,7 @@ static int32_t validateMatchExpr(tSqlExpr* pExpr, STableMeta* pTableMeta, int32_
       tscError("Failed to compile regex pattern %s. reason %s", pattern, regErrBuf);
       return invalidOperationMsg(msgBuf, msg3);
     }
+    regfree(&regex);
   }
 
   return TSDB_CODE_SUCCESS;
diff --git a/src/util/src/tcompare.c b/src/util/src/tcompare.c
index 0af7bb6fb3b2c87bd2d20d5d8c21ca25cc15774c..e906eb8423c7a9a6011aee0b2e8cf8684e904fc5 100644
--- a/src/util/src/tcompare.c
+++ b/src/util/src/tcompare.c
@@ -378,7 +378,7 @@ int32_t compareStrRegexComp(const void* pLeft, const void* pRight) {
   errCode = regexec(&regex, str, 0, NULL, 0);
   if (errCode != 0 && errCode != REG_NOMATCH) {
     regerror(errCode, &regex, msgbuf, sizeof(msgbuf));
-    uError("Failed to match %s with pattern %s, reason %s", str, pattern, msgbuf)
+    uDebug("Failed to match %s with pattern %s, reason %s", str, pattern, msgbuf)
   }
   int32_t result = (errCode == 0) ? 0 : 1;
   regfree(&regex);