83 lines
2.9 KiB
Go
83 lines
2.9 KiB
Go
// Copyright 2022 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package internal
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import (
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"context"
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"github.com/pingcap/kvproto/pkg/kvrpcpb"
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"github.com/pingcap/tidb/pkg/kv"
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"github.com/pingcap/tidb/pkg/sessionctx"
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"github.com/pingcap/tidb/pkg/sessionctx/variable"
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"github.com/pingcap/tidb/pkg/util/logutil"
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"go.uber.org/zap"
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)
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// SetTxnAssertionLevel sets assertion level of a transactin. Note that assertion level should be set only once just
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// after creating a new transaction.
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func SetTxnAssertionLevel(txn kv.Transaction, assertionLevel variable.AssertionLevel) {
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switch assertionLevel {
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case variable.AssertionLevelOff:
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txn.SetOption(kv.AssertionLevel, kvrpcpb.AssertionLevel_Off)
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case variable.AssertionLevelFast:
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txn.SetOption(kv.AssertionLevel, kvrpcpb.AssertionLevel_Fast)
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case variable.AssertionLevelStrict:
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txn.SetOption(kv.AssertionLevel, kvrpcpb.AssertionLevel_Strict)
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}
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}
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// CommitBeforeEnterNewTxn is called before entering a new transaction. It checks whether the old
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// txn is valid in which case we should commit it first.
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func CommitBeforeEnterNewTxn(ctx context.Context, sctx sessionctx.Context) error {
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txn, err := sctx.Txn(false)
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if err != nil {
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return err
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}
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if txn.Valid() {
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txnStartTS := txn.StartTS()
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txnScope := sctx.GetSessionVars().TxnCtx.TxnScope
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err = sctx.CommitTxn(ctx)
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if err != nil {
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return err
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}
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logutil.Logger(ctx).Info("Try to create a new txn inside a transaction auto commit",
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zap.Int64("schemaVersion", sctx.GetInfoSchema().SchemaMetaVersion()),
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zap.Uint64("txnStartTS", txnStartTS),
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zap.String("txnScope", txnScope))
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}
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return nil
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}
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// GetSnapshotWithTS returns a snapshot with ts.
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func GetSnapshotWithTS(s sessionctx.Context, ts uint64, interceptor kv.SnapshotInterceptor) kv.Snapshot {
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snap := s.GetStore().GetSnapshot(kv.Version{Ver: ts})
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if interceptor != nil {
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snap.SetOption(kv.SnapInterceptor, interceptor)
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}
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if s.GetSessionVars().InRestrictedSQL {
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snap.SetOption(kv.RequestSourceInternal, true)
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}
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if tp := s.GetSessionVars().RequestSourceType; tp != "" {
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snap.SetOption(kv.RequestSourceType, tp)
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}
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if tp := s.GetSessionVars().ExplicitRequestSourceType; tp != "" {
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snap.SetOption(kv.ExplicitRequestSourceType, tp)
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}
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if s.GetSessionVars().LoadBasedReplicaReadThreshold > 0 {
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snap.SetOption(kv.LoadBasedReplicaReadThreshold, s.GetSessionVars().LoadBasedReplicaReadThreshold)
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}
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return snap
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}
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