fix:modify the interface of tmq meta

examples/c/tmq.c

@@ -28,8 +28,9 @@ static void msg_process(TAOS_RES* msg) {
   printf("db: %s\n", tmq_get_db_name(msg));
   printf("vg: %d\n", tmq_get_vgroup_id(msg));
   if (tmq_get_res_type(msg) == TMQ_RES_TABLE_META) {
-    tmq_raw_data* raw = tmq_get_raw_meta(msg);
-    if (raw) {
+    tmq_raw_data raw = {0};
+    int32_t code = tmq_get_raw_meta(msg, &raw);
+    if (code == 0) {
       TAOS* pConn = taos_connect("192.168.1.86", "root", "taosdata", NULL, 0);
       if (pConn == NULL) {
         return;
@@ -53,7 +54,6 @@ static void msg_process(TAOS_RES* msg) {
       printf("write raw data: %s\n", tmq_err2str(ret));
       taos_close(pConn);
     }
-    tmq_free_raw_meta(raw);
     char* result = tmq_get_json_meta(msg);
     if (result) {
       printf("meta result: %s\n", result);

tests/test/c/tmqSim.c

@@ -597,9 +597,10 @@ static int32_t meta_msg_process(TAOS_RES* msg, SThreadInfo* pInfo, int32_t msgIn
                   tmq_get_topic_name(msg), vgroupId);
 
   {
-    tmq_raw_data *raw = tmq_get_raw_meta(msg);
+    tmq_raw_data raw = {0};
+    int32_t code = tmq_get_raw_meta(msg, &raw);
 	
-    if(raw){
+    if(code == TSDB_CODE_SUCCESS){
 	  TAOS_RES* pRes = taos_query(pInfo->taos, "use metadb");
 	  if (taos_errno(pRes) != 0) {
 		pError("error when use metadb, reason:%s\n", taos_errstr(pRes));
@@ -609,10 +610,9 @@ static int32_t meta_msg_process(TAOS_RES* msg, SThreadInfo* pInfo, int32_t msgIn
 		exit(-1);
 	  }	  
 	  taos_free_result(pRes);
-	  taosFprintfFile(g_fp, "raw:%p\n", raw);
+	  taosFprintfFile(g_fp, "raw:%p\n", &raw);
 	
-      int32_t ret = taos_write_raw_meta(pInfo->taos, raw);
-      taosMemoryFree(raw);	  
+      taos_write_raw_meta(pInfo->taos, raw);
     }
 	
     char* result = tmq_get_json_meta(msg);