[Bug]: [sdk-compatibility] GetCollectionStatistics return less number than inserted count

[ThreadDao]

Is there an existing issue for this?

• [X] I have searched the existing issues

Environment

- Milvus version: master-20230316-35be7a64
- Deployment mode(standalone or cluster): cluster
- MQ type(rocksmq, pulsar or kafka): pulsar
- SDK version(e.g. pymilvus v2.0.0rc2): go-sdk v2.2.x
- OS(Ubuntu or CentOS): 
- CPU/Memory: 
- GPU: 
- Others:

Current Behavior

1. Create a collection with fields: int64, float, float_vec, and 2 shards
2. Insert 3000 entities
3. Flush
4. GetCollectionStatistics return 1487

2023/03/16 15:53:12 milvus_client.go:22: (ApiResponse): func [GetCollectionStatistics], results: [map[row_count:1487]]
    query_test.go:307: 
        	Error Trace:	/src/milvus-sdk-go/test/testcases/query_test.go:307
        	Error:      	Not equal: 
        	            	expected: "3000"
        	            	actual  : "1487"
        	            	
        	            	Diff:
        	            	--- Expected
        	            	+++ Actual
        	            	@@ -1 +1 @@
        	            	-3000
        	            	+1487
        	Test:       	TestQueryOutputFields

Expected Behavior

No response

Steps To Reproduce

Go case: `~/milvus-sdk-go/test/testcases/query_test.go`

// test query output int64 and float and floatVector fields
func TestQueryOutputFields(t *testing.T) {
	ctx := createContext(t, time.Second*common.DefaultTimeout)
	// connect
	mc := createMilvusClient(ctx, t)

	// create collection and insert data into default partition, pks from 0 to DefaultNb
	collName := createDefaultCollection(ctx, t, mc, false)
	intColumn, floatColumn, vecColumn := common.GenDefaultColumnData(common.DefaultNb, common.DefaultNb, common.DefaultDim)
	_, errInsert := mc.Insert(ctx, collName, "", intColumn, floatColumn, vecColumn)
	common.CheckErr(t, errInsert, true)
	mc.Flush(ctx, collName, false)
	stats, _ := mc.GetCollectionStatistics(ctx, collName)
	require.Equal(t, strconv.Itoa(common.DefaultNb), stats[common.RowCount])

	// create index
	idx, _ := entity.NewIndexHNSW(entity.L2, 8, 96)
	mc.CreateIndex(ctx, collName, common.DefaultFloatVecFieldName, idx, false)

	// Load collection
	errLoad := mc.LoadCollection(ctx, collName, false)
	common.CheckErr(t, errLoad, true)

	//query
	pos := 10
	queryResult, _ := mc.Query(
		ctx, collName,
		[]string{common.DefaultPartition},
		entity.NewColumnInt64(common.DefaultIntFieldName, intColumn.Data()[:pos]),
		[]string{common.DefaultIntFieldName, common.DefaultFloatFieldName, common.DefaultFloatVecFieldName},
	)
	common.CheckQueryResult(t, queryResult, []entity.Column{
		entity.NewColumnInt64(common.DefaultIntFieldName, intColumn.Data()[:pos]),
		entity.NewColumnFloat(common.DefaultFloatFieldName, floatColumn.Data()[:pos]),
		entity.NewColumnFloatVector(common.DefaultFloatVecFieldName, common.DefaultDim, vecColumn.Data()[:pos]),
	})
	common.CheckOutputFields(t, queryResult, []string{common.DefaultIntFieldName, common.DefaultFloatFieldName, common.DefaultFloatVecFieldName})
}

### Milvus Log

argo job: https://argo-qa-devops.zilliz.cc/artifacts-by-uid/21e20a03-487e-4138-a7f8-82d87c56d5d0/sdk-compat-cron-1678981200-740216105/main-logs
cluster: devops, namespace: chaos-testing

sdk-compat-cron-1678981200-cluster-etcd-0 1/1 Running 0 22m sdk-compat-cron-1678981200-cluster-etcd-1 1/1 Running 1 (20m ago) 22m sdk-compat-cron-1678981200-cluster-etcd-2 1/1 Running 1 (20m ago) 22m sdk-compat-cron-1678981200-cluster-milvus-datacoord-68dcc5grk46 1/1 Running 0 15m sdk-compat-cron-1678981200-cluster-milvus-datanode-5b87dd4jm5bn 1/1 Running 0 15m sdk-compat-cron-1678981200-cluster-milvus-indexcoord-6ff5bttrdx 1/1 Running 0 15m sdk-compat-cron-1678981200-cluster-milvus-indexnode-55488bn7fh9 1/1 Running 0 15m sdk-compat-cron-1678981200-cluster-milvus-proxy-564bdb5d49n2tzt 1/1 Running 0 15m sdk-compat-cron-1678981200-cluster-milvus-querycoord-9f84bx8t77 1/1 Running 0 15m sdk-compat-cron-1678981200-cluster-milvus-querynode-85544bjmnq6 1/1 Running 0 15m sdk-compat-cron-1678981200-cluster-milvus-rootcoord-84d45dvdnmj 1/1 Running 0 15m sdk-compat-cron-1678981200-cluster-minio-0 1/1 Running 0 22m sdk-compat-cron-1678981200-cluster-minio-1 1/1 Running 0 22m sdk-compat-cron-1678981200-cluster-minio-2 1/1 Running 0 22m sdk-compat-cron-1678981200-cluster-minio-3 1/1 Running 0 22m sdk-compat-cron-1678981200-cluster-pulsar-bookie-0 1/1 Running 0 22m sdk-compat-cron-1678981200-cluster-pulsar-bookie-1 1/1 Running 0 22m sdk-compat-cron-1678981200-cluster-pulsar-bookie-2 1/1 Running 0 22m sdk-compat-cron-1678981200-cluster-pulsar-bookie-init-2tvzb 0/1 Completed 0 22m sdk-compat-cron-1678981200-cluster-pulsar-broker-0 1/1 Running 0 22m sdk-compat-cron-1678981200-cluster-pulsar-proxy-0 1/1 Running 0 22m sdk-compat-cron-1678981200-cluster-pulsar-pulsar-init-c6q84 0/1 Completed 0 22m sdk-compat-cron-1678981200-cluster-pulsar-recovery-0 1/1 Running 0 22m sdk-compat-cron-1678981200-cluster-pulsar-zookeeper-0 1/1 Running 0 22m sdk-compat-cron-1678981200-cluster-pulsar-zookeeper-1 1/1 Running 0 21m sdk-compat-cron-1678981200-cluster-pulsar-zookeeper-2 1/1 Running 0 20m

### Anything else?

_No response_

[yanliang567]

/assign @congqixia /unassign

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. Rotten issues close after 30d of inactivity. Reopen the issue with /reopen.

[congqixia]

/reopen

[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions. Rotten issues close after 30d of inactivity. Reopen the issue with /reopen.