*: implement inspection_summary system table which organizes metrics by link/module

executor/builder.go

@@ -1317,10 +1317,18 @@ func (b *executorBuilder) buildMemTable(v *plannercore.PhysicalMemTable) Executo
 		case strings.ToLower(infoschema.TableInspectionResult):
 			return &MemTableReaderExec{
 				baseExecutor: newBaseExecutor(b.ctx, v.Schema(), v.ExplainID()),
-				retriever: &inspectionRetriever{
+				retriever: &inspectionResultRetriever{
 					extractor: v.Extractor.(*plannercore.InspectionResultTableExtractor),
 				},
 			}
+		case strings.ToLower(infoschema.TableInspectionSummary):
+			return &MemTableReaderExec{
+				baseExecutor: newBaseExecutor(b.ctx, v.Schema(), v.ExplainID()),
+				retriever: &inspectionSummaryRetriever{
+					table:     v.Table,
+					extractor: v.Extractor.(*plannercore.InspectionSummaryTableExtractor),
+				},
+			}
 		case strings.ToLower(infoschema.TableMetricSummary):
 			return &MemTableReaderExec{
 				baseExecutor: newBaseExecutor(b.ctx, v.Schema(), v.ExplainID()),

executor/executor_pkg_test.go

@@ -36,6 +36,9 @@ import (
 var _ = Suite(&testExecSuite{})
 var _ = SerialSuites(&testExecSerialSuite{})
 
+// Note: it's a tricky way to export the `inspectionSummaryRules` for unit test but invisible for normal code
+var InspectionSummaryRules = inspectionSummaryRules
+
 type testExecSuite struct {
 }
 

executor/diagnostics.go → executor/inspection_result.go

@@ -92,13 +92,13 @@ var inspectionRules = []inspectionRule{
 	&thresholdCheckInspection{inspectionName: "threshold-check"},
 }
 
-type inspectionRetriever struct {
+type inspectionResultRetriever struct {
 	dummyCloser
 	retrieved bool
 	extractor *plannercore.InspectionResultTableExtractor
 }
 
-func (e *inspectionRetriever) retrieve(ctx context.Context, sctx sessionctx.Context) ([][]types.Datum, error) {
+func (e *inspectionResultRetriever) retrieve(ctx context.Context, sctx sessionctx.Context) ([][]types.Datum, error) {
 	if e.retrieved || e.extractor.SkipInspection {
 		return nil, nil
 	}

executor/diagnostics_test.go → executor/inspection_result_test.go

@@ -27,26 +27,26 @@ import (
 	"github.com/pingcap/tidb/util/testkit"
 )
 
-var _ = Suite(&diagnosticsSuite{})
+var _ = SerialSuites(&inspectionResultSuite{})
 
-type diagnosticsSuite struct {
+type inspectionResultSuite struct {
 	store kv.Storage
 	dom   *domain.Domain
 }
 
-func (s *diagnosticsSuite) SetUpSuite(c *C) {
+func (s *inspectionResultSuite) SetUpSuite(c *C) {
 	store, dom, err := newStoreWithBootstrap()
 	c.Assert(err, IsNil)
 	s.store = store
 	s.dom = dom
 }
 
-func (s *diagnosticsSuite) TearDownSuite(c *C) {
+func (s *inspectionResultSuite) TearDownSuite(c *C) {
 	s.dom.Close()
 	s.store.Close()
 }
 
-func (s *diagnosticsSuite) TestInspectionResult(c *C) {
+func (s *inspectionResultSuite) TestInspectionResult(c *C) {
 	tk := testkit.NewTestKitWithInit(c, s.store)
 
 	mockData := map[string]variable.TableSnapshot{}
@@ -166,13 +166,13 @@ func (s *diagnosticsSuite) TestInspectionResult(c *C) {
 	}
 }
 
-func (s *diagnosticsSuite) parseTime(c *C, se session.Session, str string) types.Time {
+func (s *inspectionResultSuite) parseTime(c *C, se session.Session, str string) types.Time {
 	t, err := types.ParseTime(se.GetSessionVars().StmtCtx, str, mysql.TypeDatetime, types.MaxFsp)
 	c.Assert(err, IsNil)
 	return t
 }
 
-func (s *diagnosticsSuite) TestThresholdCheckInspection(c *C) {
+func (s *inspectionResultSuite) TestThresholdCheckInspection(c *C) {
 	tk := testkit.NewTestKitWithInit(c, s.store)
 	// mock tikv configuration.
 	configurations := map[string]variable.TableSnapshot{}
@@ -277,7 +277,7 @@ func (s *diagnosticsSuite) TestThresholdCheckInspection(c *C) {
 		"grpc_cpu tikv tikv-0 7.21 < 7.20, config: server.grpc-concurrency=8 select instance, sum(value) as cpu from metric_schema.tikv_thread_cpu where name like 'grpc%' and time=now() group by instance"))
 }
 
-func (s *diagnosticsSuite) TestCriticalErrorInspection(c *C) {
+func (s *inspectionResultSuite) TestCriticalErrorInspection(c *C) {
 	tk := testkit.NewTestKitWithInit(c, s.store)
 
 	fpName := "github.com/pingcap/tidb/executor/mockMetricsTableData"