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// root_coord.proto
service RootCoord {
// NEW
// CreateAlias creates 1 to 1 mapping between `alias` and `collection_name`
// 1. If there no `alias` in the metaTable:
// 1.1 new `alias` will be added to the metaTable
// 1.2 `alias` will be persisted in the `etcd`
// 1.3 `dd_op` will sent to log broker.
// 2. If there is `alias/collection` in the metaTable:
// 2.1 An `alias/collection already exists` error will be returned.
rpc CreateAlias(milvus.CreateAliasRequest) returns (common.Status) {}
// NEW
// 1. DropAlias
// 1.1 Removes existing mapping from the metaTable
// 1.2 Removes existing mapping from the `etcd`
// 1.3 `dd_op` will be sent to the log broker.
// 1.4 Invalidates proxy caches
rpc DropAlias(milvus.DropAliasRequest) returns (common.Status) {}
// NEW
// 1. AlterAlias
// 1.1 Existing mapping will be updated in metaTable.
// 1.2 Existing mapping will be updated in `etcd`
// 1.3 `dd_op` will be sent to log broker.
// 1.4 Invalidates proxy caches.
rpc AlterAlias(milvus.AlterAliasRequest) returns (common.Status) {}
// UPDATED REQUIRED
// Collection can't be dropped if it is referenced by an `alias`.
rpc DropCollection(DropCollectionRequest) returns (common.Status) {}
// UPDATED REQUIRED
// DescribeCollection now returns `aliases`
rpc DescribeCollection(DescribeCollectionRequest) returns (DescribeCollectionResponse) {}
}
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