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[skip ci]Add some comments in chap07_query_coordinator.md (#10520) 

Signed-off-by: ruiyi.jiang <ruiyi.jiang@zilliz.com>
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ryjiang 2021-10-24 08:57:19 +08:00 committed by GitHub
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docs/developer_guides/chap07_query_coordinator.md
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@ -233,6 +233,14 @@ type QueryNode interface {
Component
TimeTickProvider
// AddQueryChannel notifies QueryNode to subscribe a query channel and be a producer of a query result channel.
// `ctx` is the context to control request deadline and cancellation.
// `req` contains the request params, which are collection id, query channel and query result channel.
//
// Return UnexpectedError code in status:
// If QueryNode isn't in HEALTHY: states not HEALTHY or dynamic checks not HEALTHY.
// Return Success code in status:
// Subscribe a query channel and be a producer of a query result channel.
AddQueryChannel(ctx context.Context, req *querypb.AddQueryChannelRequest) (*commonpb.Status, error)
RemoveQueryChannel(ctx context.Context, req *querypb.RemoveQueryChannelRequest) (*commonpb.Status, error)
WatchDmChannels(ctx context.Context, req *querypb.WatchDmChannelsRequest) (*commonpb.Status, error)