95 lines
2.6 KiB
Go
95 lines
2.6 KiB
Go
// Copyright 2018 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 lockstats
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import (
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"context"
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"fmt"
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"github.com/pingcap/errors"
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"github.com/pingcap/tidb/pkg/domain"
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"github.com/pingcap/tidb/pkg/executor/internal/exec"
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"github.com/pingcap/tidb/pkg/parser/ast"
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"github.com/pingcap/tidb/pkg/util/chunk"
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)
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var _ exec.Executor = &UnlockExec{}
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// UnlockExec represents a unlock statistic executor.
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type UnlockExec struct {
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exec.BaseExecutor
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// Tables is the list of tables to be unlocked.
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// It might contain partition names if we are unlocking partitions.
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// When unlocking partitions, Tables will only contain one table name.
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Tables []*ast.TableName
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}
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// Next implements the Executor Next interface.
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func (e *UnlockExec) Next(context.Context, *chunk.Chunk) error {
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do := domain.GetDomain(e.Ctx())
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h := do.StatsHandle()
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if h == nil {
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return errors.New("Unlock Stats: handle is nil")
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}
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if len(e.Tables) == 0 {
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return errors.New("Unlock Stats: table should not empty ")
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}
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is := do.InfoSchema()
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if e.onlyUnlockPartitions() {
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table := e.Tables[0]
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tid, pidNames, err := populatePartitionIDAndNames(table, table.PartitionNames, is)
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if err != nil {
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return err
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}
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tableName := fmt.Sprintf("%s.%s", table.Schema.O, table.Name.O)
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msg, err := h.RemoveLockedPartitions(tid, tableName, pidNames)
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if err != nil {
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return err
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}
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if msg != "" {
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e.Ctx().GetSessionVars().StmtCtx.AppendWarning(errors.NewNoStackError(msg))
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}
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} else {
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tableWithPartitions, err := populateTableAndPartitionIDs(e.Tables, is)
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if err != nil {
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return err
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}
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msg, err := h.RemoveLockedTables(tableWithPartitions)
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if err != nil {
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return err
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}
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if msg != "" {
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e.Ctx().GetSessionVars().StmtCtx.AppendWarning(errors.NewNoStackError(msg))
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}
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}
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return nil
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}
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func (e *UnlockExec) onlyUnlockPartitions() bool {
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return len(e.Tables) == 1 && len(e.Tables[0].PartitionNames) > 0
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}
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// Close implements the Executor Close interface.
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func (*UnlockExec) Close() error {
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return nil
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}
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// Open implements the Executor Open interface.
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func (*UnlockExec) Open(context.Context) error {
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return nil
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}
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