bindinfo, record how bindings are created in SQL bindings.

bindinfo/bind_test.go

@@ -118,8 +118,9 @@ func (s *testSuite) TestBindParse(c *C) {
 	status := "using"
 	charset := "utf8mb4"
 	collation := "utf8mb4_bin"
-	sql := fmt.Sprintf(`INSERT INTO mysql.bind_info(original_sql,bind_sql,default_db,status,create_time,update_time,charset,collation) VALUES ('%s', '%s', '%s', '%s', NOW(), NOW(),'%s', '%s')`,
-		originSQL, bindSQL, defaultDb, status, charset, collation)
+	source := bindinfo.Manual
+	sql := fmt.Sprintf(`INSERT INTO mysql.bind_info(original_sql,bind_sql,default_db,status,create_time,update_time,charset,collation,source) VALUES ('%s', '%s', '%s', '%s', NOW(), NOW(),'%s', '%s', '%s')`,
+		originSQL, bindSQL, defaultDb, status, charset, collation, source)
 	tk.MustExec(sql)
 	bindHandle := bindinfo.NewBindHandle(tk.Se)
 	err := bindHandle.Update(true)
@@ -858,7 +859,8 @@ func (s *testSuite) TestEvolveInvalidBindings(c *C) {
 	tk.MustExec("create table t(a int, b int, index idx_a(a))")
 	tk.MustExec("create global binding for select * from t where a > 10 using select /*+ USE_INDEX(t) */ * from t where a > 10")
 	// Manufacture a rejected binding by hacking mysql.bind_info.
-	tk.MustExec("insert into mysql.bind_info values('select * from t where a > ?', 'select /*+ USE_INDEX(t,idx_a) */ * from t where a > 10', 'test', 'rejected', '2000-01-01 09:00:00', '2000-01-01 09:00:00', '', '')")
+	tk.MustExec("insert into mysql.bind_info values('select * from t where a > ?', 'select /*+ USE_INDEX(t,idx_a) */ * from t where a > 10', 'test', 'rejected', '2000-01-01 09:00:00', '2000-01-01 09:00:00', '', '','" +
+		bindinfo.Manual + "')")
 	tk.MustQuery("select bind_sql, status from mysql.bind_info").Sort().Check(testkit.Rows(
 		"select /*+ USE_INDEX(t) */ * from t where a > 10 using",
 		"select /*+ USE_INDEX(t,idx_a) */ * from t where a > 10 rejected",
@@ -1165,3 +1167,55 @@ func (s *testSuite) TestInvisibleIndex(c *C) {
 
 	tk.MustExec("drop binding for select * from t")
 }
+
+func (s *testSuite) TestbindingSource(c *C) {
+	tk := testkit.NewTestKit(c, s.store)
+	s.cleanBindingEnv(tk)
+	tk.MustExec("use test")
+	tk.MustExec("drop table if exists t")
+	tk.MustExec("create table t(a int, index idx_a(a))")
+
+	// Test Source for SQL created sql
+	tk.MustExec("create global binding for select * from t where a > 10 using select * from t ignore index(idx_a) where a > 10")
+	bindHandle := s.domain.BindHandle()
+	sql, hash := parser.NormalizeDigest("select * from t where a > ?")
+	bindData := bindHandle.GetBindRecord(hash, sql, "test")
+	c.Check(bindData, NotNil)
+	c.Check(bindData.OriginalSQL, Equals, "select * from t where a > ?")
+	c.Assert(len(bindData.Bindings), Equals, 1)
+	bind := bindData.Bindings[0]
+	c.Assert(bind.Source, Equals, bindinfo.Manual)
+
+	// Test Source for evolved sql
+	tk.MustExec("set @@tidb_evolve_plan_baselines=1")
+	tk.MustQuery("select * from t where a > 10")
+	bindHandle.SaveEvolveTasksToStore()
+	sql, hash = parser.NormalizeDigest("select * from t where a > ?")
+	bindData = bindHandle.GetBindRecord(hash, sql, "test")
+	c.Check(bindData, NotNil)
+	c.Check(bindData.OriginalSQL, Equals, "select * from t where a > ?")
+	c.Assert(len(bindData.Bindings), Equals, 2)
+	bind = bindData.Bindings[1]
+	c.Assert(bind.Source, Equals, bindinfo.Evolve)
+	tk.MustExec("set @@tidb_evolve_plan_baselines=0")
+
+	// Test Source for captured sqls
+	stmtsummary.StmtSummaryByDigestMap.Clear()
+	tk.MustExec("set @@tidb_capture_plan_baselines = on")
+	defer func() {
+		tk.MustExec("set @@tidb_capture_plan_baselines = off")
+	}()
+	tk.MustExec("use test")
+	c.Assert(tk.Se.Auth(&auth.UserIdentity{Username: "root", Hostname: "%"}, nil, nil), IsTrue)
+	tk.MustExec("select * from t ignore index(idx_a) where a < 10")
+	tk.MustExec("select * from t ignore index(idx_a) where a < 10")
+	tk.MustExec("admin capture bindings")
+	bindHandle.CaptureBaselines()
+	sql, hash = parser.NormalizeDigest("select * from t where a < ?")
+	bindData = bindHandle.GetBindRecord(hash, sql, "test")
+	c.Check(bindData, NotNil)
+	c.Check(bindData.OriginalSQL, Equals, "select * from t where a < ?")
+	c.Assert(len(bindData.Bindings), Equals, 1)
+	bind = bindData.Bindings[0]
+	c.Assert(bind.Source, Equals, bindinfo.Capture)
+}

bindinfo/cache.go

@@ -36,6 +36,12 @@ const (
 	// Rejected means that the bind has been rejected after verify process.
 	// We can retry it after certain time has passed.
 	Rejected = "rejected"
+	// Manual indicates the binding is created by SQL like "create binding for ...".
+	Manual = "manual"
+	// Capture indicates the binding is captured by TiDB automatically.
+	Capture = "capture"
+	// Evolve indicates the binding is evolved by TiDB from old bindings.
+	Evolve = "evolve"
 )
 
 // Binding stores the basic bind hint info.
@@ -47,6 +53,7 @@ type Binding struct {
 	Status     string
 	CreateTime types.Time
 	UpdateTime types.Time
+	Source     string
 	Charset    string
 	Collation  string
 	// Hint is the parsed hints, it is used to bind hints to stmt node.

bindinfo/handle.go

@@ -125,7 +125,7 @@ func (h *BindHandle) Update(fullLoad bool) (err error) {
 	lastUpdateTime := h.bindInfo.lastUpdateTime
 	h.bindInfo.Unlock()
 
-	sql := "select original_sql, bind_sql, default_db, status, create_time, update_time, charset, collation from mysql.bind_info"
+	sql := "select original_sql, bind_sql, default_db, status, create_time, update_time, charset, collation, source from mysql.bind_info"
 	if !fullLoad {
 		sql += " where update_time > \"" + lastUpdateTime.String() + "\""
 	}
@@ -462,6 +462,7 @@ func (h *BindHandle) newBindRecord(row chunk.Row) (string, *BindRecord, error) {
 		UpdateTime: row.GetTime(5),
 		Charset:    row.GetString(6),
 		Collation:  row.GetString(7),
+		Source:     row.GetString(8),
 	}
 	bindRecord := &BindRecord{
 		OriginalSQL: row.GetString(0),
@@ -567,7 +568,7 @@ func (h *BindHandle) deleteBindInfoSQL(normdOrigSQL, db, bindSQL string) string
 }
 
 func (h *BindHandle) insertBindInfoSQL(orignalSQL string, db string, info Binding) string {
-	return fmt.Sprintf(`INSERT INTO mysql.bind_info VALUES (%s, %s, %s, %s, %s, %s, %s, %s)`,
+	return fmt.Sprintf(`INSERT INTO mysql.bind_info VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s)`,
 		expression.Quote(orignalSQL),
 		expression.Quote(info.BindSQL),
 		expression.Quote(db),
@@ -576,6 +577,7 @@ func (h *BindHandle) insertBindInfoSQL(orignalSQL string, db string, info Bindin
 		expression.Quote(info.UpdateTime.String()),
 		expression.Quote(info.Charset),
 		expression.Quote(info.Collation),
+		expression.Quote(info.Source),
 	)
 }
 
@@ -628,6 +630,7 @@ func (h *BindHandle) CaptureBaselines() {
 			Status:    Using,
 			Charset:   charset,
 			Collation: collation,
+			Source:    Capture,
 		}
 		// We don't need to pass the `sctx` because the BindSQL has been validated already.
 		err = h.AddBindRecord(nil, &BindRecord{OriginalSQL: normalizedSQL, Db: dbName, Bindings: []Binding{binding}})

executor/bind.go

@@ -82,6 +82,7 @@ func (e *SQLBindExec) createSQLBind() error {
 		Charset:   e.charset,
 		Collation: e.collation,
 		Status:    bindinfo.Using,
+		Source:    bindinfo.Manual,
 	}
 	record := &bindinfo.BindRecord{
 		OriginalSQL: e.normdOrigSQL,

executor/show.go

@@ -276,6 +276,7 @@ func (e *ShowExec) fetchShowBind() error {
 				hint.UpdateTime,
 				hint.Charset,
 				hint.Collation,
+				hint.Source,
 			})
 		}
 	}

infoschema/tables_test.go

@@ -1217,7 +1217,7 @@ func (s *testTableSuite) TestStmtSummaryInternalQuery(c *C) {
 	tk.MustQuery(`select exec_count, digest_text
 		from information_schema.statements_summary
 		where digest_text like "select original_sql , bind_sql , default_db , status%"`).Check(testkit.Rows(
-		"1 select original_sql , bind_sql , default_db , status , create_time , update_time , charset , collation from mysql . bind_info" +
+		"1 select original_sql , bind_sql , default_db , status , create_time , update_time , charset , collation , source from mysql . bind_info" +
 			" where update_time > ? order by update_time"))
 }
 

planner/core/planbuilder.go

@@ -3107,8 +3107,8 @@ func buildShowSchema(s *ast.ShowStmt, isView bool, isSequence bool) (schema *exp
 		names = []string{"Privilege", "Context", "Comment"}
 		ftypes = []byte{mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar}
 	case ast.ShowBindings:
-		names = []string{"Original_sql", "Bind_sql", "Default_db", "Status", "Create_time", "Update_time", "Charset", "Collation"}
-		ftypes = []byte{mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeDatetime, mysql.TypeDatetime, mysql.TypeVarchar, mysql.TypeVarchar}
+		names = []string{"Original_sql", "Bind_sql", "Default_db", "Status", "Create_time", "Update_time", "Charset", "Collation", "Source"}
+		ftypes = []byte{mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeDatetime, mysql.TypeDatetime, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar}
 	case ast.ShowAnalyzeStatus:
 		names = []string{"Table_schema", "Table_name", "Partition_name", "Job_info", "Processed_rows", "Start_time", "State"}
 		ftypes = []byte{mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeVarchar, mysql.TypeLonglong, mysql.TypeDatetime, mysql.TypeVarchar}

planner/optimize.go

@@ -266,6 +266,7 @@ func handleEvolveTasks(ctx context.Context, sctx sessionctx.Context, br *bindinf
 		Status:    bindinfo.PendingVerify,
 		Charset:   charset,
 		Collation: collation,
+		Source:    bindinfo.Evolve,
 	}
 	globalHandle := domain.GetDomain(sctx).BindHandle()
 	globalHandle.AddEvolvePlanTask(br.OriginalSQL, br.Db, binding)

session/bootstrap.go

@@ -240,6 +240,7 @@ const (
 		update_time timestamp(3) NOT NULL,
 		charset text NOT NULL,
 		collation text NOT NULL,
+		source varchar(10) NOT NULL default 'unknown',
 		INDEX sql_index(original_sql(1024),default_db(1024)) COMMENT "accelerate the speed when add global binding query",
 		INDEX time_index(update_time) COMMENT "accelerate the speed when querying with last update time"
 	) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin;`
@@ -386,6 +387,8 @@ const (
 	version45 = 45
 	// version46 fix a bug in v3.1.1.
 	version46 = 46
+	// version47 add Source to bindings to indicate the way binding created.
+	version47 = 47
 )
 
 var (
@@ -435,6 +438,7 @@ var (
 		upgradeToVer44,
 		upgradeToVer45,
 		upgradeToVer46,
+		upgradeToVer47,
 	}
 )
 
@@ -1060,6 +1064,13 @@ func upgradeToVer46(s Session, ver int64) {
 	mustExecute(s, "UPDATE HIGH_PRIORITY mysql.user SET File_priv='Y' where Super_priv='Y'")
 }
 
+func upgradeToVer47(s Session, ver int64) {
+	if ver >= version47 {
+		return
+	}
+	doReentrantDDL(s, "ALTER TABLE mysql.bind_info ADD COLUMN `source` varchar(10) NOT NULL default 'unknown'", infoschema.ErrColumnExists)
+}
+
 // updateBootstrapVer updates bootstrap version variable in mysql.TiDB table.
 func updateBootstrapVer(s Session) {
 	// Update bootstrap version.

session/session.go

@@ -1920,7 +1920,7 @@ func CreateSessionWithDomain(store kv.Storage, dom *domain.Domain) (*session, er
 
 const (
 	notBootstrapped         = 0
-	currentBootstrapVersion = version46
+	currentBootstrapVersion = version47
 )
 
 func getStoreBootstrapVersion(store kv.Storage) int64 {