53 lines
1.4 KiB
Go
53 lines
1.4 KiB
Go
// Copyright 2024 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 executor
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import (
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"context"
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"github.com/pingcap/tidb/pkg/executor/internal/exec"
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"github.com/pingcap/tidb/pkg/kv"
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"github.com/pingcap/tidb/pkg/meta"
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"github.com/pingcap/tidb/pkg/util/chunk"
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)
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// AdminShowBDRRoleExec represents a show BDR role executor.
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type AdminShowBDRRoleExec struct {
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exec.BaseExecutor
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done bool
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}
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var _ exec.Executor = &AdminShowBDRRoleExec{}
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// Next implements the Executor Next interface.
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func (e *AdminShowBDRRoleExec) Next(ctx context.Context, req *chunk.Chunk) error {
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req.Reset()
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if e.done {
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return nil
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}
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return kv.RunInNewTxn(kv.WithInternalSourceType(ctx, kv.InternalTxnAdmin), e.Ctx().GetStore(), true, func(_ context.Context, txn kv.Transaction) error {
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role, err := meta.NewMutator(txn).GetBDRRole()
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if err != nil {
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return err
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}
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req.AppendString(0, role)
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e.done = true
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return nil
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})
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}
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