zxybazh commented on code in PR #12628:
URL: https://github.com/apache/tvm/pull/12628#discussion_r959908816
##########
include/tvm/meta_schedule/database.h:
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@@ -357,6 +357,22 @@ class Database : public runtime::ObjectRef {
*/
TVM_DLL static Database JSONDatabase(String path_workload, String
path_tuning_record,
bool allow_missing);
+ /*!
+ * \brief A database composed of multiple databases, allowing users to guide
IR rewriting using
+ * combined knowledge of those databases. To each query, it returns the best
record among all the
+ * databases given.
+ * \param databases The list of databases to be combined.
+ * \return The combined database.
+ */
+ TVM_DLL static Database UnionDatabase(Array<Database, void> databases);
Review Comment:
I think given `Union Database` it's easy to think of a database which
returns the best result among all databases given, and this is consistent with
the database api of get top k. For `OrderedUnionDatabase` I agree the name is a
bit not straghtforward, maybe it could be changed to something like
`FirstAvailableUnionDatabase`.
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