fix alter collection merge multi props policy (#24147)

Signed-off-by: Wei Liu <wei.liu@zilliz.com>

internal/rootcoord/alter_collection_task.go

@@ -22,9 +22,11 @@ import (
 
 	"github.com/cockroachdb/errors"
 
+	"github.com/milvus-io/milvus/internal/metastore/model"
 	"github.com/milvus-io/milvus/pkg/log"
 	"go.uber.org/zap"
 
+	"github.com/milvus-io/milvus-proto/go-api/commonpb"
 	"github.com/milvus-io/milvus-proto/go-api/milvuspb"
 )
 
@@ -55,7 +57,7 @@ func (a *alterCollectionTask) Execute(ctx context.Context) error {
 	}
 
 	newColl := oldColl.Clone()
-	newColl.Properties = a.Req.GetProperties()
+	updateCollectionProperties(newColl, a.Req.GetProperties())
 
 	ts := a.GetTs()
 	redoTask := newBaseRedoTask(a.core.stepExecutor)
@@ -82,3 +84,25 @@ func (a *alterCollectionTask) Execute(ctx context.Context) error {
 
 	return redoTask.Execute(ctx)
 }
+
+func updateCollectionProperties(coll *model.Collection, updatedProps []*commonpb.KeyValuePair) {
+	props := make(map[string]string)
+	for _, prop := range coll.Properties {
+		props[prop.Key] = prop.Value
+	}
+
+	for _, prop := range updatedProps {
+		props[prop.Key] = prop.Value
+	}
+
+	propKV := make([]*commonpb.KeyValuePair, 0)
+
+	for key, value := range props {
+		propKV = append(propKV, &commonpb.KeyValuePair{
+			Key:   key,
+			Value: value,
+		})
+	}
+
+	coll.Properties = propKV
+}

internal/rootcoord/alter_collection_task_test.go

@@ -157,4 +157,52 @@ func Test_alterCollectionTask_Execute(t *testing.T) {
 		err := task.Execute(context.Background())
 		assert.NoError(t, err)
 	})
+
+	t.Run("test update collection props", func(t *testing.T) {
+		coll := &model.Collection{
+			Properties: []*commonpb.KeyValuePair{
+				{
+					Key:   common.CollectionTTLConfigKey,
+					Value: "1",
+				},
+			},
+		}
+
+		updateProps1 := []*commonpb.KeyValuePair{
+			{
+				Key:   common.CollectionAutoCompactionKey,
+				Value: "true",
+			},
+		}
+		updateCollectionProperties(coll, updateProps1)
+
+		assert.Contains(t, coll.Properties, &commonpb.KeyValuePair{
+			Key:   common.CollectionTTLConfigKey,
+			Value: "1",
+		})
+
+		assert.Contains(t, coll.Properties, &commonpb.KeyValuePair{
+			Key:   common.CollectionAutoCompactionKey,
+			Value: "true",
+		})
+
+		updateProps2 := []*commonpb.KeyValuePair{
+			{
+				Key:   common.CollectionTTLConfigKey,
+				Value: "2",
+			},
+		}
+		updateCollectionProperties(coll, updateProps2)
+
+		assert.Contains(t, coll.Properties, &commonpb.KeyValuePair{
+			Key:   common.CollectionTTLConfigKey,
+			Value: "2",
+		})
+
+		assert.Contains(t, coll.Properties, &commonpb.KeyValuePair{
+			Key:   common.CollectionAutoCompactionKey,
+			Value: "true",
+		})
+
+	})
 }