add table meta msg

include/common/tmsg.h

@@ -1240,6 +1240,31 @@ static FORCE_INLINE void* tDeserializeSVCreateTbReq(void* buf, SVCreateTbReq* pR
 typedef struct SVCreateTbRsp {
 } SVCreateTbRsp;
 
+typedef struct SVShowTablesReq {
+  SMsgHead head;
+} SVShowTablesReq;
+
+typedef struct SVShowTablesRsp {
+  int64_t       id;
+  STableMetaMsg metaInfo;
+} SVShowTablesRsp;
+
+typedef struct SVShowTablesFetchReq {
+  SMsgHead head;
+  int64_t  id;
+} SVShowTablesFetchReq;
+
+typedef struct SVShowTablesFetchRsp {
+  int64_t useconds;
+  int8_t  completed;  // all results are returned to client
+  int8_t  precision;
+  int8_t  compressed;
+  int32_t compLen;
+
+  int32_t numOfRows;
+  char    data[];
+} SVShowTablesFetchRsp;
+
 #pragma pack(pop)
 
 #ifdef __cplusplus

include/common/tmsgdef.h

@@ -146,6 +146,8 @@ enum {
   TD_DEF_MSG_TYPE(TDMT_VND_CREATE_TOPIC, "vnode-create-topic", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_VND_ALTER_TOPIC, "vnode-alter-topic", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_VND_DROP_TOPIC, "vnode-drop-topic", NULL, NULL)
+  TD_DEF_MSG_TYPE(TDMT_VND_SHOW_TABLES, "vnode-show-tables", SVShowTablesReq, SVShowTablesRsp)
+  TD_DEF_MSG_TYPE(TDMT_VND_SHOW_TABLES_FETCH, "vnode-show-tables-fetch", SVShowTablesFetchReq, SVShowTablesFetchRsp)
 
   // Requests handled by QNODE
   TD_NEW_MSG_SEG(TDMT_QND_MSG)