[TD-13246]<fix>(query): Coredump when parentheses appear before the insert_sql

src/client/src/tscParseInsert.c

@@ -1584,9 +1584,6 @@ int tsInsertInitialCheck(SSqlObj *pSql) {
   int32_t  index = 0;
   SSqlCmd *pCmd = &pSql->cmd;
 
-  SStrToken sToken = tStrGetToken(pSql->sqlstr, &index, false);
-  assert(sToken.type == TK_INSERT || sToken.type == TK_IMPORT);
-
   pCmd->count   = 0;
   pCmd->command = TSDB_SQL_INSERT;
   SInsertStatementParam* pInsertParam = &pCmd->insertParam;
@@ -1594,6 +1591,11 @@ int tsInsertInitialCheck(SSqlObj *pSql) {
   SQueryInfo *pQueryInfo = tscGetQueryInfoS(pCmd);
   TSDB_QUERY_SET_TYPE(pQueryInfo->type, TSDB_QUERY_TYPE_INSERT);
 
+  SStrToken sToken = tStrGetToken(pSql->sqlstr, &index, false);
+  if (sToken.type != TK_INSERT && sToken.type != TK_IMPORT) {
+    return tscSQLSyntaxErrMsg(pInsertParam->msg, NULL, sToken.z);
+  }
+
   sToken = tStrGetToken(pSql->sqlstr, &index, false);
   if (sToken.type != TK_INTO) {
     return tscSQLSyntaxErrMsg(pInsertParam->msg, "keyword INTO is expected", sToken.z);