test: case for alter db replica

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

@@ -1344,6 +1344,9 @@ int32_t mndValidateDbInfo(SMnode *pMnode, SDbVgVersion *pDbs, int32_t numOfDbs,
       mDebug("db:%s, version & numOfTable not changed", pDbVgVersion->dbFName);
       mndReleaseDb(pMnode, pDb);
       continue;
+    } else {
+      mDebug("db:%s, vgroup version changed from %d to %d", pDbVgVersion->dbFName, pDbVgVersion->vgVersion,
+             pDb->vgVersion);
     }
 
     usedbRsp.pVgroupInfos = taosArrayInit(pDb->cfg.numOfVgroups, sizeof(SVgroupInfo));

tests/script/tsim/db/alter_replica_31.sim

+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -i 1
+system sh/deploy.sh -n dnode2 -i 2
+system sh/deploy.sh -n dnode3 -i 3
+system sh/deploy.sh -n dnode4 -i 4
+system sh/exec.sh -n dnode1 -s start
+system sh/exec.sh -n dnode2 -s start
+system sh/exec.sh -n dnode3 -s start
+system sh/exec.sh -n dnode4 -s start
+sql connect
+
+print =============== step1: create dnodes
+sql create dnode $hostname port 7200
+sql create dnode $hostname port 7300
+sql create dnode $hostname port 7400
+
+$x = 0
+step1:
+	$x = $x + 1
+	sleep 1000
+	if $x == 10 then
+	  print ====> dnode not ready!
+		return -1
+	endi
+sql show dnodes
+print ===> rows: $rows 
+print ===> $data00 $data01 $data02 $data03 $data04 $data05
+print ===> $data10 $data11 $data12 $data13 $data14 $data15
+print ===> $data20 $data21 $data22 $data23 $data24 $data25
+print ===> $data30 $data31 $data32 $data33 $data24 $data35
+if $rows != 4 then
+  return -1
+endi
+if $data(1)[4] != ready then
+  goto step1
+endi
+if $data(2)[4] != ready then
+  goto step1
+endi
+if $data(3)[4] != ready then
+  goto step1
+endi
+if $data(4)[4] != ready then
+  goto step1
+endi
+
+print =============== step2: create database
+sql create database db vgroups 1 replica 3
+sql show databases
+if $rows != 3 then 
+  return -1
+endi
+if $data(db)[4] != 3 then 
+  return -1
+endi
+
+sql show dnodes
+if $data(2)[2] != 1 then
+  return -1
+endi
+if $data(3)[2] != 1 then
+  return -1
+endi
+if $data(4)[2] != 1 then
+  return -1
+endi
+
+# vnodes
+sql show dnodes
+if $data(2)[2] != 1 then
+  return -1
+endi
+if $data(3)[2] != 1 then
+  return -1
+endi
+if $data(4)[2] != 1 then
+  return -1
+endi
+
+# v1_dnode
+sql show db.vgroups
+print ===> $data00 $data01 $data02 $data03 $data04 $data05 $data06 $data07 $data08
+if $data(2)[3] != 4 then
+  return -1
+endi
+if $data(2)[5] != 3 then
+  return -1
+endi
+if $data(2)[7] != 2 then
+  return -1
+endi
+
+sql create table db.stb (ts timestamp, c1 int, c2 binary(4)) tags(t1 int, t2 binary(16)) comment "abd"
+sql create table db.ctb using db.stb tags(101, "102")
+sql insert into db.ctb values(now, 1, "2")
+
+sql show db.vgroups
+print ===> $data00 $data01 $data02 $data03 $data04 $data05 $data06 $data07 $data08
+
+sleep 1000
+sql select * from db.ctb
+print ===> $data00 $data01 $data02 $data03 $data04 $data05
+
+if $rows != 1 then
+  return -1
+endi
+
+sleep 3000
+
+print ============= step3: alter database
+sql alter database db replica 1
+
+$x = 0
+step3:
+	$x = $x + 1
+	sleep 1000
+	if $x == 10 then
+	  print ====> dnode not ready!
+		return -1
+	endi
+sql show db.vgroups
+print ===> rows: $rows 
+if $rows != 1 then
+  goto step3
+endi
+if $data(2)[3] != 4 then
+  goto step3
+endi
+if $data(2)[5] != NULL then
+  goto step3
+endi
+if $data(2)[7] != NULL then
+  goto step3
+endi
+
+print ============= step5: stop dnode 2
+return
+sql select * from db.stb
+if $rows != 1 then
+  return -1
+endi
+
+system sh/exec.sh -n dnode1 -s stop -x SIGINT
+system sh/exec.sh -n dnode2 -s stop -x SIGINT
+system sh/exec.sh -n dnode3 -s stop -x SIGINT
+system sh/exec.sh -n dnode4 -s stop -x SIGINT
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