This is an automated cherry-pick of pingcap#53921

Signed-off-by: ti-chi-bot <[email protected]>

cmd/explaintest/r/index_merge.result

@@ -850,6 +850,11 @@ CTE_0	1.80	root		Recursive CTE
     └─CTETable_16	1.00	root		Scan on CTE_0
 show warnings;
 Level	Code	Message
+<<<<<<< HEAD:cmd/explaintest/r/index_merge.result
+=======
+Warning	1815	use_index_merge(index_merge.t_alias) is inapplicable, check whether the table(index_merge.t_alias) exists
+Warning	1815	use_index_merge(index_merge.t_alias) is inapplicable, check whether the table(index_merge.t_alias) exists
+>>>>>>> 2372cf828c2 (hint: avoid duplicate hints in QBHintHandler (#53921)):tests/integrationtest/r/index_merge.result
 with recursive cte1 as (select 1 c1, 1 c2, 1 c3 UNION ALL select /*+ use_index_merge(t_alias) */ c1 + 1, c2 + 1, c3 + 1 from cte1 t_alias where c1 < 10 or c2 < 10 and c3 < 10) select * from cte1 order by 1;
 c1	c2	c3
 1	1	1

pkg/planner/core/casetest/hint/BUILD.bazel

@@ -0,0 +1,26 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_test")
+
+go_test(
+    name = "hint_test",
+    timeout = "short",
+    srcs = [
+        "hint_test.go",
+        "main_test.go",
+    ],
+    data = glob(["testdata/**"]),
+    flaky = True,
+    shard_count = 8,
+    deps = [
+        "//pkg/config",
+        "//pkg/domain",
+        "//pkg/parser/model",
+        "//pkg/planner/util/coretestsdk",
+        "//pkg/sessionctx/variable",
+        "//pkg/testkit",
+        "//pkg/testkit/testdata",
+        "//pkg/testkit/testmain",
+        "//pkg/testkit/testsetup",
+        "@com_github_stretchr_testify//require",
+        "@org_uber_go_goleak//:goleak",
+    ],
+)