158 lines
4.0 KiB
Go
158 lines
4.0 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 executor
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import (
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"context"
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"github.com/pingcap/errors"
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"github.com/pingcap/tidb/domain"
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"github.com/pingcap/tidb/parser/ast"
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"github.com/pingcap/tidb/util/chunk"
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)
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var _ Executor = &LockStatsExec{}
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var _ Executor = &UnlockStatsExec{}
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// LockStatsExec represents a lock statistic executor.
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type LockStatsExec struct {
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baseExecutor
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Tables []*ast.TableName
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}
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// lockStatsVarKeyType is a dummy type to avoid naming collision in context.
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type lockStatsVarKeyType int
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// String defines a Stringer function for debugging and pretty printing.
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func (k lockStatsVarKeyType) String() string {
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return "lock_stats_var"
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}
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// LockStatsVarKey is a variable key for lock statistic.
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const LockStatsVarKey lockStatsVarKeyType = 0
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// Next implements the Executor Next interface.
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func (e *LockStatsExec) Next(ctx context.Context, req *chunk.Chunk) error {
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do := domain.GetDomain(e.ctx)
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is := do.InfoSchema()
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h := do.StatsHandle()
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if h == nil {
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return errors.New("Lock Stats: handle is nil")
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}
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tableNum := len(e.Tables)
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if tableNum == 0 {
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return errors.New("Lock Stats: table should not empty ")
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}
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tids := make([]int64, 0, len(e.Tables))
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pids := make([]int64, 0)
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for _, table := range e.Tables {
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tbl, err := is.TableByName(table.Schema, table.Name)
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if err != nil {
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return err
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}
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tids = append(tids, tbl.Meta().ID)
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pi := tbl.Meta().GetPartitionInfo()
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if pi == nil {
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continue
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}
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for _, p := range pi.Definitions {
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pids = append(pids, p.ID)
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}
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}
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msg, err := h.AddLockedTables(tids, pids, e.Tables)
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if msg != "" {
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e.ctx.GetSessionVars().StmtCtx.AppendWarning(errors.New(msg))
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}
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return err
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}
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// Close implements the Executor Close interface.
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func (e *LockStatsExec) 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 (e *LockStatsExec) Open(ctx context.Context) error {
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return nil
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}
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// UnlockStatsExec represents a unlock statistic executor.
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type UnlockStatsExec struct {
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baseExecutor
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Tables []*ast.TableName
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}
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// unlockStatsVarKeyType is a dummy type to avoid naming collision in context.
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type unlockStatsVarKeyType int
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// String defines a Stringer function for debugging and pretty printing.
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func (k unlockStatsVarKeyType) String() string {
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return "unlock_stats_var"
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}
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// UnlockStatsVarKey is a variable key for unlock statistic.
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const UnlockStatsVarKey unlockStatsVarKeyType = 0
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// Next implements the Executor Next interface.
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func (e *UnlockStatsExec) Next(ctx context.Context, req *chunk.Chunk) error {
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do := domain.GetDomain(e.ctx)
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is := do.InfoSchema()
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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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tableNum := len(e.Tables)
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if tableNum == 0 {
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return errors.New("Unlock Stats: table should not empty ")
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}
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tids := make([]int64, 0, len(e.Tables))
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pids := make([]int64, 0)
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for _, table := range e.Tables {
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tbl, err := is.TableByName(table.Schema, table.Name)
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if err != nil {
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return err
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}
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tids = append(tids, tbl.Meta().ID)
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pi := tbl.Meta().GetPartitionInfo()
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if pi == nil {
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continue
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}
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for _, p := range pi.Definitions {
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pids = append(pids, p.ID)
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}
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}
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msg, err := h.RemoveLockedTables(tids, pids, e.Tables)
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if msg != "" {
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e.ctx.GetSessionVars().StmtCtx.AppendWarning(errors.New(msg))
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}
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return err
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}
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// Close implements the Executor Close interface.
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func (e *UnlockStatsExec) 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 (e *UnlockStatsExec) Open(ctx context.Context) error {
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return nil
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}
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