support upgrade from low version

src/mnode/src/mnodeDb.c

@@ -778,7 +778,11 @@ static int32_t mnodeRetrieveDbs(SShowObj *pShow, char *data, int32_t rows, void
     pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
     
     char tmp[128] = {0};
-    sprintf(tmp, "%d,%d,%d", pDb->cfg.daysToKeep0, pDb->cfg.daysToKeep1, pDb->cfg.daysToKeep2);
+    if (pDb->cfg.daysToKeep0 > pDb->cfg.daysToKeep1 || pDb->cfg.daysToKeep0 > pDb->cfg.daysToKeep2) { 
+      sprintf(tmp, "%d,%d,%d", pDb->cfg.daysToKeep1, pDb->cfg.daysToKeep2, pDb->cfg.daysToKeep0);
+    } else {
+      sprintf(tmp, "%d,%d,%d", pDb->cfg.daysToKeep0, pDb->cfg.daysToKeep1, pDb->cfg.daysToKeep2);
+    }
     STR_WITH_SIZE_TO_VARSTR(pWrite, tmp, strlen(tmp));
     cols++;
 
@@ -937,6 +941,13 @@ static SDbCfg mnodeGetAlterDbOption(SDbObj *pDb, SAlterDbMsg *pAlter) {
   
   terrno = TSDB_CODE_SUCCESS;
 
+  if (pDb->cfg.daysToKeep0 > pDb->cfg.daysToKeep1 || pDb->cfg.daysToKeep0 > pDb->cfg.daysToKeep2) {
+    int32_t t = pDb->cfg.daysToKeep0;
+    newCfg.daysToKeep0 = pDb->cfg.daysToKeep1;
+    newCfg.daysToKeep1 = pDb->cfg.daysToKeep2;
+    newCfg.daysToKeep2 = t;
+  }
+
   if (cacheBlockSize > 0 && cacheBlockSize != pDb->cfg.cacheBlockSize) {
     mError("db:%s, can't alter cache option", pDb->name);
     terrno = TSDB_CODE_MND_INVALID_DB_OPTION;

src/mnode/src/mnodeVgroup.c

@@ -894,9 +894,9 @@ static SCreateVnodeMsg *mnodeBuildVnodeMsg(SVgObj *pVgroup) {
   pCfg->totalBlocks         = htonl(pDb->cfg.totalBlocks);
   pCfg->maxTables           = htonl(maxTables + 1);
   pCfg->daysPerFile         = htonl(pDb->cfg.daysPerFile);
-  pCfg->daysToKeep          = htonl(pDb->cfg.daysToKeep2);        //FROM DB TO VNODE MAP
-  pCfg->daysToKeep1         = htonl(pDb->cfg.daysToKeep0);
-  pCfg->daysToKeep2         = htonl(pDb->cfg.daysToKeep1);  
+  pCfg->daysToKeep          = htonl(pDb->cfg.daysToKeep2);        //FROM DB TO VNODE MAP:
+  pCfg->daysToKeep1         = htonl(pDb->cfg.daysToKeep0);        //keep0,keep1,keep2 in SQL is mapped to keep1,keep2,keep in vnode
+  pCfg->daysToKeep2         = htonl(pDb->cfg.daysToKeep1);        //user,client,mnode use keep0,keep1,keep2; vnode use keep1,keep2,keep
   pCfg->minRowsPerFileBlock = htonl(pDb->cfg.minRowsPerFileBlock);
   pCfg->maxRowsPerFileBlock = htonl(pDb->cfg.maxRowsPerFileBlock);
   pCfg->fsyncPeriod         = htonl(pDb->cfg.fsyncPeriod);