enh: add version for show cluster

source/common/src/systable.c

@@ -67,6 +67,8 @@ static const SSysDbTableSchema clusterSchema[] = {
     {.name = "name", .bytes = TSDB_CLUSTER_ID_LEN + VARSTR_HEADER_SIZE, .type = TSDB_DATA_TYPE_VARCHAR, .sysInfo = true},
     {.name = "uptime", .bytes = 4, .type = TSDB_DATA_TYPE_INT, .sysInfo = true},
     {.name = "create_time", .bytes = 8, .type = TSDB_DATA_TYPE_TIMESTAMP, .sysInfo = true},
+    {.name = "version", .bytes = 10 + VARSTR_HEADER_SIZE, .type = TSDB_DATA_TYPE_VARCHAR, .sysInfo = true},  
+    {.name = "expire_time", .bytes = 8, .type = TSDB_DATA_TYPE_TIMESTAMP, .sysInfo = true},
 };
 
 static const SSysDbTableSchema userDBSchema[] = {

source/dnode/mnode/impl/src/mndCluster.c

@@ -20,6 +20,8 @@
 
 #define CLUSTER_VER_NUMBE    1
 #define CLUSTER_RESERVE_SIZE 60
+char    tsVersionName[16] = "community";
+int64_t tsExpireTime = 0;
 
 static SSdbRaw *mndClusterActionEncode(SClusterObj *pCluster);
 static SSdbRow *mndClusterActionDecode(SSdbRaw *pRaw);
@@ -291,6 +293,18 @@ static int32_t mndRetrieveClusters(SRpcMsg *pMsg, SShowObj *pShow, SSDataBlock *
     pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
     colDataAppend(pColInfo, numOfRows, (const char *)&pCluster->createdTime, false);
 
+    char ver[12] = {0};
+    STR_WITH_MAXSIZE_TO_VARSTR(ver, tsVersionName, pShow->pMeta->pSchemas[cols].bytes);
+    pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
+    colDataAppend(pColInfo, numOfRows, (const char *)ver, false);
+
+    pColInfo = taosArrayGet(pBlock->pDataBlock, cols++);
+    if (tsExpireTime <= 0) {
+      colDataAppendNULL(pColInfo, numOfRows);
+    } else {
+      colDataAppend(pColInfo, numOfRows, (const char *)&tsExpireTime, false);
+    }
+
     sdbRelease(pSdb, pCluster);
     numOfRows++;
   }