From 3cf5fe8f7dd1e056249b2d7bc34c57b250909ef3 Mon Sep 17 00:00:00 2001
From: shenglian zhou <shenglian_zhou@163.com>
Date: Wed, 5 Jan 2022 11:41:54 +0800
Subject: [PATCH] (query,insert,other,connector,tools):use tlv for
 sversion/tversion for message compatibility

---
 src/client/src/tscServer.c | 14 ++++++++++++--
 src/inc/taosmsg.h          |  2 ++
 src/query/src/queryMain.c  | 17 ++++++++++++++---
 3 files changed, 28 insertions(+), 5 deletions(-)

diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index c3982f04ec..30ebb63a77 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -2755,8 +2755,6 @@ int tscProcessRetrieveRspFromNode(SSqlObj *pSql) {
 
   pRes->numOfRows  = htonl(pRetrieve->numOfRows);
   pRes->precision  = htons(pRetrieve->precision);
-  pRes->sVersion = htonl(pRetrieve->sVersion);
-  pRes->tVersion = htonl(pRetrieve->tVersion);
   pRes->offset     = htobe64(pRetrieve->offset);
   pRes->useconds   = htobe64(pRetrieve->useconds);
   pRes->completed  = (pRetrieve->completed == 1);
@@ -2807,6 +2805,18 @@ int tscProcessRetrieveRspFromNode(SSqlObj *pSql) {
   tscDebug("0x%"PRIx64" numOfRows:%d, offset:%" PRId64 ", complete:%d, qId:0x%"PRIx64, pSql->self, pRes->numOfRows, pRes->offset,
       pRes->completed, pRes->qId);
 
+  if (pRetrieve->extend == 1) {
+    STLV* tlv = (STLV*)(pRetrieve->data + ntohl(pRetrieve->compLen));
+    while (tlv->type != TLV_TYPE_END_MARK) {
+      switch (tlv->type) {
+        case TLV_TYPE_META_VERSION:
+          pRes->sVersion = ntohl(*(int32_t*)tlv->value);
+          pRes->tVersion = ntohl(*(int32_t*)(tlv->value + sizeof(int32_t)));
+          break;
+      }
+      tlv = (STLV*) ((char*)tlv + sizeof(STLV) + ntohl(tlv->len));
+    }
+  }
   return 0;
 }
 
diff --git a/src/inc/taosmsg.h b/src/inc/taosmsg.h
index dc65d828da..d9f6d0f2e3 100644
--- a/src/inc/taosmsg.h
+++ b/src/inc/taosmsg.h
@@ -980,7 +980,9 @@ typedef struct {
 } STLV;
 
 enum {
+  TLV_TYPE_END_MARK = -1,
   TLV_TYPE_DUMMY = 1,
+  TLV_TYPE_META_VERSION = 2,
 };
 
 #pragma pack(pop)
diff --git a/src/query/src/queryMain.c b/src/query/src/queryMain.c
index 4ac4d89d74..c5365a0c68 100644
--- a/src/query/src/queryMain.c
+++ b/src/query/src/queryMain.c
@@ -391,7 +391,8 @@ int32_t qDumpRetrieveResult(qinfo_t qinfo, SRetrieveTableRsp **pRsp, int32_t *co
   size += sizeof(STableIdInfo) * taosHashGetSize(pRuntimeEnv->pTableRetrieveTsMap);
 
   *contLen = (int32_t)(size + sizeof(SRetrieveTableRsp));
-
+  *contLen += (sizeof(STLV) + sizeof(int32_t) + sizeof(int32_t)); //tlv meta version
+  *contLen += sizeof(STLV); // tlv end mark
   // current solution only avoid crash, but cannot return error code to client
   *pRsp = (SRetrieveTableRsp *)rpcMallocCont(*contLen);
   if (*pRsp == NULL) {
@@ -409,8 +410,6 @@ int32_t qDumpRetrieveResult(qinfo_t qinfo, SRetrieveTableRsp **pRsp, int32_t *co
   }
 
   (*pRsp)->precision = htons(pQueryAttr->precision);
-  (*pRsp)->sVersion = htonl(pQueryAttr->tableGroupInfo.sVersion);
-  (*pRsp)->tVersion = htonl(pQueryAttr->tableGroupInfo.tVersion);
   (*pRsp)->compressed = (int8_t)((tsCompressColData != -1) && checkNeedToCompressQueryCol(pQInfo));
 
   if (GET_NUM_OF_RESULTS(&(pQInfo->runtimeEnv)) > 0 && pQInfo->code == TSDB_CODE_SUCCESS) {
@@ -446,6 +445,18 @@ int32_t qDumpRetrieveResult(qinfo_t qinfo, SRetrieveTableRsp **pRsp, int32_t *co
     qDebug("QInfo:0x%"PRIx64" has more results to retrieve", pQInfo->qId);
   }
 
+  (*pRsp)->extend = 1;
+  STLV* tlv = (STLV*)((*pRsp)->data + compLen);
+  tlv->type = htons(TLV_TYPE_META_VERSION);
+  tlv->len = htonl(sizeof(int32_t) + sizeof(int32_t));
+  int32_t sVersion = htonl(pQueryAttr->tableGroupInfo.sVersion);
+  int32_t tVersion = htonl(pQueryAttr->tableGroupInfo.tVersion);
+  memcpy(tlv->value, &sVersion, sizeof(int32_t));
+  memcpy(tlv->value + sizeof(int32_t), &tVersion, sizeof(int32_t));
+
+  STLV* tlvEnd = (STLV*)((char*)tlv + sizeof(STLV) + ntohl(tlv->len));
+  tlvEnd->type = htons(TLV_TYPE_END_MARK);
+  tlvEnd->len = 0;
   // the memory should be freed if the code of pQInfo is not TSDB_CODE_SUCCESS
   if (pQInfo->code != TSDB_CODE_SUCCESS) {
     rpcFreeCont(*pRsp);
-- 
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