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session: if txn invalid do not active it and return an error #13935

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merged 9 commits into from
Dec 9, 2019
Merged

session: if txn invalid do not active it and return an error #13935

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65ce3d2
session: if txn invalid do not active it and return an error
jackysp Dec 5, 2019
ce55f69
add a test
jackysp Dec 5, 2019
8a80509
fix bootstrap
jackysp Dec 5, 2019
2c8d5ac
fix test
jackysp Dec 5, 2019
1924800
fix test
jackysp Dec 5, 2019
331f5a1
address comments
jackysp Dec 6, 2019
77a5da8
fix wrong modify
jackysp Dec 6, 2019
b1355ae
address comments
jackysp Dec 6, 2019
0b7c417
Merge branch 'master' into pess_panic
sre-bot Dec 9, 2019
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2 changes: 1 addition & 1 deletion executor/adapter.go
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Original file line number Diff line number Diff line change
Expand Up @@ -595,7 +595,7 @@ func (a *ExecStmt) handlePessimisticLockError(ctx context.Context, err error) (E
if err != nil {
tsErr := UpdateForUpdateTS(a.Ctx, 0)
if tsErr != nil {
return nil, tsErr
logutil.Logger(ctx).Warn("UpdateForUpdateTS failed", zap.Error(tsErr))
}
}
return nil, err
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2 changes: 1 addition & 1 deletion executor/batch_point_get.go
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Expand Up @@ -82,7 +82,7 @@ func (e *BatchPointGetExec) initialize(ctx context.Context) error {
return err
}

txn, err := e.ctx.Txn(true)
txn, err := e.ctx.Txn(false)
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Do we need to check all these Txn(true) usages, seems many

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I've checked all of them. In another way, if Txn(true), it prefers to return an error when txn is invalid, but all the tests passed.

if err != nil {
return err
}
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2 changes: 1 addition & 1 deletion executor/builder.go
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Expand Up @@ -1230,7 +1230,7 @@ func (b *executorBuilder) getStartTS() (uint64, error) {
if err != nil {
return 0, err
}
if startTS == 0 && txn.Valid() {
if startTS == 0 {
startTS = txn.StartTS()
}
b.startTS = startTS
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2 changes: 1 addition & 1 deletion executor/executor_test.go
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Expand Up @@ -2652,7 +2652,7 @@ func (s *testSuite) TestSelectForUpdate(c *C) {
tk.MustExec("drop table if exists t, t1")

txn, err := tk.Se.Txn(true)
c.Assert(err, IsNil)
c.Assert(kv.ErrInvalidTxn.Equal(err), IsTrue)
c.Assert(txn.Valid(), IsFalse)
tk.MustExec("create table t (c1 int, c2 int, c3 int)")
tk.MustExec("insert t values (11, 2, 3)")
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2 changes: 1 addition & 1 deletion executor/point_get.go
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Expand Up @@ -162,7 +162,7 @@ func (e *PointGetExecutor) lockKeyIfNeeded(ctx context.Context, key []byte) erro
}

func (e *PointGetExecutor) get(ctx context.Context, key kv.Key) (val []byte, err error) {
txn, err := e.ctx.Txn(true)
txn, err := e.ctx.Txn(false)
if err != nil {
return nil, err
}
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2 changes: 1 addition & 1 deletion executor/simple.go
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Expand Up @@ -621,7 +621,7 @@ func (e *SimpleExec) executeRollback(s *ast.RollbackStmt) error {
sessVars := e.ctx.GetSessionVars()
logutil.BgLogger().Debug("execute rollback statement", zap.Uint64("conn", sessVars.ConnectionID))
sessVars.SetStatusFlag(mysql.ServerStatusInTrans, false)
txn, err := e.ctx.Txn(true)
txn, err := e.ctx.Txn(false)
if err != nil {
return err
}
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3 changes: 3 additions & 0 deletions session/session.go
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Expand Up @@ -1314,6 +1314,9 @@ func (s *session) DropPreparedStmt(stmtID uint32) error {
}

func (s *session) Txn(active bool) (kv.Transaction, error) {
if !s.txn.validOrPending() && active {
return &s.txn, kv.ErrInvalidTxn
}
if s.txn.pending() && active {
// Transaction is lazy initialized.
// PrepareTxnCtx is called to get a tso future, makes s.txn a pending txn,
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8 changes: 5 additions & 3 deletions session/session_test.go
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Expand Up @@ -300,7 +300,7 @@ func (s *testSessionSuite) TestRowLock(c *C) {

tk.MustExec("drop table if exists t")
txn, err := tk.Se.Txn(true)
c.Assert(err, IsNil)
c.Assert(kv.ErrInvalidTxn.Equal(err), IsTrue)
c.Assert(txn.Valid(), IsFalse)
tk.MustExec("create table t (c1 int, c2 int, c3 int)")
tk.MustExec("insert t values (11, 2, 3)")
Expand Down Expand Up @@ -389,7 +389,9 @@ func (s *testSessionSuite) TestTxnLazyInitialize(c *C) {
tk.MustExec("create table t (id int)")

tk.MustExec("set @@autocommit = 0")
txn, err := tk.Se.Txn(false)
txn, err := tk.Se.Txn(true)
c.Assert(kv.ErrInvalidTxn.Equal(err), IsTrue)
txn, err = tk.Se.Txn(false)
c.Assert(err, IsNil)
c.Assert(txn.Valid(), IsFalse)
tk.MustQuery("select @@tidb_current_ts").Check(testkit.Rows("0"))
Expand Down Expand Up @@ -719,7 +721,7 @@ func (s *testSessionSuite) TestRetryPreparedStmt(c *C) {

tk.MustExec("drop table if exists t")
txn, err := tk.Se.Txn(true)
c.Assert(err, IsNil)
c.Assert(kv.ErrInvalidTxn.Equal(err), IsTrue)
c.Assert(txn.Valid(), IsFalse)
tk.MustExec("create table t (c1 int, c2 int, c3 int)")
tk.MustExec("insert t values (11, 2, 3)")
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