planner: clustered index support primary index hint (pingcap#18478)

ti-chi-bot · Jul 10, 2020 · 563f2c9 · 563f2c9
1 parent af129d2
commit 563f2c9
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Showing 2 changed files with 8 additions and 1 deletion.
diff --git a/executor/clustered_index_test.go b/executor/clustered_index_test.go
@@ -96,3 +96,10 @@ func (s *testClusteredSuite) TestClusteredTopN(c *C) {
 	tk.MustExec("insert o3 values (1, 6, 9, 3), (2, 6, 9, 5), (3, 6, 9, 7)")
 	tk.MustQuery("SELECT max(o_id) max_order FROM o3 use index (idx_order)").Check(testkit.Rows("3"))
 }
+
+func (s *testClusteredSuite) TestClusteredHint(c *C) {
+	tk := s.newTK(c)
+	tk.MustExec("drop table if exists ht")
+	tk.MustExec("create table ht (a varchar(64) primary key, b int)")
+	tk.MustQuery("select * from ht use index (`PRIMARY`)")
+}
diff --git a/planner/core/planbuilder.go b/planner/core/planbuilder.go
@@ -768,7 +768,7 @@ func getPathByIndexName(paths []*util.AccessPath, idxName model.CIStr, tblInfo *
 			return path
 		}
 	}
-	if isPrimaryIndex(idxName) && tblInfo.PKIsHandle {
+	if isPrimaryIndex(idxName) && (tblInfo.PKIsHandle || tblInfo.IsCommonHandle) {
 		return tablePath
 	}
 	return nil