[GitHub] [tvm] junrushao commented on a diff in pull request #12628: [MetaSchedule] Introduce `Union` and `OrderedUnion` in Database

[GitBox <gi...@apache.org>]

junrushao commented on code in PR #12628:
URL: https://github.com/apache/tvm/pull/12628#discussion_r960926524


##########
include/tvm/meta_schedule/database.h:
##########
@@ -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:
   Thank you @sunggg!!! It definitely clarifies a lot! adding this to the doc 



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