enh: create SDB_DB entry in prepareAction

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

@@ -448,6 +448,16 @@ static void mndSetDefaultDbCfg(SDbCfg *pCfg) {
   if (pCfg->tsdbPageSize <= 0) pCfg->tsdbPageSize = TSDB_DEFAULT_TSDB_PAGESIZE;
 }
 
+static int32_t mndSetCreateDbPrepareActions(SMnode *pMnode, STrans *pTrans, SDbObj *pDb) {
+  SSdbRaw *pDbRaw = mndDbActionEncode(pDb);
+  if (pDbRaw == NULL) return -1;
+
+  STransAction action = {.pRaw = pDbRaw, .msgType = TDMT_MND_CREATE_DB};
+  if (mndTransAppendPrepareAction(pTrans, &action) != 0) return -1;
+  if (sdbSetRawStatus(pDbRaw, SDB_STATUS_CREATING) != 0) return -1;
+  return 0;
+}
+
 static int32_t mndSetNewVgPrepareActions(SMnode *pMnode, STrans *pTrans, SDbObj *pDb, SVgObj *pVgroups) {
   for (int32_t v = 0; v < pDb->cfg.numOfVgroups; ++v) {
     if (mndAddNewVgPrepareAction(pMnode, pTrans, (pVgroups + v)) != 0) return -1;
@@ -459,7 +469,7 @@ static int32_t mndSetCreateDbRedoLogs(SMnode *pMnode, STrans *pTrans, SDbObj *pD
   SSdbRaw *pDbRaw = mndDbActionEncode(pDb);
   if (pDbRaw == NULL) return -1;
   if (mndTransAppendRedolog(pTrans, pDbRaw) != 0) return -1;
-  if (sdbSetRawStatus(pDbRaw, SDB_STATUS_CREATING) != 0) return -1;
+  if (sdbSetRawStatus(pDbRaw, SDB_STATUS_UPDATE) != 0) return -1;
 
   for (int32_t v = 0; v < pDb->cfg.numOfVgroups; ++v) {
     SSdbRaw *pVgRaw = mndVgroupActionEncode(pVgroups + v);
@@ -633,6 +643,7 @@ static int32_t mndCreateDb(SMnode *pMnode, SRpcMsg *pReq, SCreateDbReq *pCreate,
   if (mndTransCheckConflict(pMnode, pTrans) != 0) goto _OVER;
 
   mndTransSetOper(pTrans, MND_OPER_CREATE_DB);
+  if (mndSetCreateDbPrepareActions(pMnode, pTrans, &dbObj) != 0) goto _OVER;
   if (mndSetNewVgPrepareActions(pMnode, pTrans, &dbObj, pVgroups) != 0) goto _OVER;
   if (mndSetCreateDbRedoLogs(pMnode, pTrans, &dbObj, pVgroups) != 0) goto _OVER;
   if (mndSetCreateDbUndoLogs(pMnode, pTrans, &dbObj, pVgroups) != 0) goto _OVER;

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

@@ -16,6 +16,7 @@
 #define _DEFAULT_SOURCE
 #include "mndSync.h"
 #include "mndCluster.h"
+#include "mndDb.h"
 #include "mndTrans.h"
 #include "mndVgroup.h"
 
@@ -74,23 +75,37 @@ static int32_t mndSyncSendMsg(const SEpSet *pEpSet, SRpcMsg *pMsg) {
   return code;
 }
 
-static int32_t mndTransValidatePrepareAction(SMnode *pMnode, STrans *pTrans, STransAction *pAction) {
-  SSdbRow *pRow = NULL;
-  int32_t  code = -1;
+static int32_t mndValidateNewVgPrepareAction(SMnode *pMnode, STrans *pTrans, STransAction *pAction) {
+  int      code = -1;
+  SSdbRow *pRow = (pMnode->pSdb->decodeFps[SDB_VGROUP])(pAction->pRaw);
+  if (pRow == NULL) goto _OUT;
+  SVgObj *pVgroup = sdbGetRowObj(pRow);
+  if (pVgroup == NULL) goto _OUT;
 
-  if (pAction->msgType == TDMT_MND_CREATE_VG) {
-    pRow = mndVgroupActionDecode(pAction->pRaw);
-    if (pRow == NULL) goto _OUT;
+  int32_t maxVgId = sdbGetMaxId(pMnode->pSdb, SDB_VGROUP);
+  if (maxVgId > pVgroup->vgId) {
+    mError("trans:%d, vgroup id %d already in use. maxVgId:%d", pTrans->id, pVgroup->vgId, maxVgId);
+    goto _OUT;
+  }
 
-    SVgObj *pVgroup = sdbGetRowObj(pRow);
-    if (pVgroup == NULL) goto _OUT;
+  code = 0;
+_OUT:
+  taosMemoryFreeClear(pRow);
+  return code;
+}
 
-    int32_t maxVgId = sdbGetMaxId(pMnode->pSdb, SDB_VGROUP);
-    if (maxVgId > pVgroup->vgId) {
-      mError("trans:%d, failed to satisfy vgroup id %d of prepare action. maxVgId:%d", pTrans->id, pVgroup->vgId,
-             maxVgId);
-      goto _OUT;
-    }
+static int32_t mndValidateCreateDbPrepareAction(SMnode *pMnode, STrans *pTrans, STransAction *pAction) {
+  int      code = -1;
+  SSdbRow *pRow = (pMnode->pSdb->decodeFps[SDB_DB])(pAction->pRaw);
+  if (pRow == NULL) goto _OUT;
+  SDbObj *pNewDb = sdbGetRowObj(pRow);
+  if (pNewDb == NULL) goto _OUT;
+
+  SDbObj *pOldDb = sdbAcquire(pMnode->pSdb, SDB_DB, pNewDb->name);
+  if (pOldDb != NULL) {
+    mError("trans:%d, db name already in use. name: %s", pTrans->id, pNewDb->name);
+    sdbRelease(pMnode->pSdb, pOldDb);
+    goto _OUT;
   }
 
   code = 0;
@@ -99,6 +114,22 @@ _OUT:
   return code;
 }
 
+static int32_t mndTransValidatePrepareAction(SMnode *pMnode, STrans *pTrans, STransAction *pAction) {
+  int32_t code = 0;
+
+  switch (pAction->pRaw->type) {
+    case SDB_VGROUP:
+      code = mndValidateNewVgPrepareAction(pMnode, pTrans, pAction);
+      break;
+    case SDB_DB:
+      code = mndValidateCreateDbPrepareAction(pMnode, pTrans, pAction);
+      break;
+    default:
+  }
+
+  return code;
+}
+
 static int32_t mndTransValidatePrepareStage(SMnode *pMnode, STrans *pTrans) {
   int32_t code = -1;
   int32_t action = 0;

source/dnode/mnode/sdb/src/sdbHash.c

@@ -79,6 +79,8 @@ const char *sdbStatusName(ESdbStatus status) {
       return "dropped";
     case SDB_STATUS_INIT:
       return "init";
+    case SDB_STATUS_UPDATE:
+      return "update";
     default:
       return "undefine";
   }