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*: add statistic lock/unlock function (#38387)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,157 @@ | ||
| // Copyright 2018 PingCAP, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package executor | ||
|
|
||
| import ( | ||
| "context" | ||
|
|
||
| "github.com/pingcap/errors" | ||
| "github.com/pingcap/tidb/domain" | ||
| "github.com/pingcap/tidb/parser/ast" | ||
| "github.com/pingcap/tidb/util/chunk" | ||
| ) | ||
|
|
||
| var _ Executor = &LockStatsExec{} | ||
| var _ Executor = &UnlockStatsExec{} | ||
|
|
||
| // LockStatsExec represents a lock statistic executor. | ||
| type LockStatsExec struct { | ||
| baseExecutor | ||
| Tables []*ast.TableName | ||
| } | ||
|
|
||
| // lockStatsVarKeyType is a dummy type to avoid naming collision in context. | ||
| type lockStatsVarKeyType int | ||
|
|
||
| // String defines a Stringer function for debugging and pretty printing. | ||
| func (k lockStatsVarKeyType) String() string { | ||
| return "lock_stats_var" | ||
| } | ||
|
|
||
| // LockStatsVarKey is a variable key for lock statistic. | ||
| const LockStatsVarKey lockStatsVarKeyType = 0 | ||
|
|
||
| // Next implements the Executor Next interface. | ||
| func (e *LockStatsExec) Next(ctx context.Context, req *chunk.Chunk) error { | ||
| do := domain.GetDomain(e.ctx) | ||
| is := do.InfoSchema() | ||
| h := do.StatsHandle() | ||
| if h == nil { | ||
| return errors.New("Lock Stats: handle is nil") | ||
| } | ||
|
|
||
| tableNum := len(e.Tables) | ||
| if tableNum == 0 { | ||
| return errors.New("Lock Stats: table should not empty ") | ||
| } | ||
|
|
||
| tids := make([]int64, 0, len(e.Tables)) | ||
| pids := make([]int64, 0) | ||
| for _, table := range e.Tables { | ||
| tbl, err := is.TableByName(table.Schema, table.Name) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| tids = append(tids, tbl.Meta().ID) | ||
|
|
||
| pi := tbl.Meta().GetPartitionInfo() | ||
| if pi == nil { | ||
| continue | ||
| } | ||
| for _, p := range pi.Definitions { | ||
| pids = append(pids, p.ID) | ||
| } | ||
| } | ||
| msg, err := h.AddLockedTables(tids, pids, e.Tables) | ||
| if msg != "" { | ||
| e.ctx.GetSessionVars().StmtCtx.AppendWarning(errors.New(msg)) | ||
| } | ||
| return err | ||
| } | ||
|
|
||
| // Close implements the Executor Close interface. | ||
| func (e *LockStatsExec) Close() error { | ||
| return nil | ||
| } | ||
|
|
||
| // Open implements the Executor Open interface. | ||
| func (e *LockStatsExec) Open(ctx context.Context) error { | ||
| return nil | ||
| } | ||
|
|
||
| // UnlockStatsExec represents a unlock statistic executor. | ||
| type UnlockStatsExec struct { | ||
| baseExecutor | ||
| Tables []*ast.TableName | ||
| } | ||
|
|
||
| // unlockStatsVarKeyType is a dummy type to avoid naming collision in context. | ||
| type unlockStatsVarKeyType int | ||
|
|
||
| // String defines a Stringer function for debugging and pretty printing. | ||
| func (k unlockStatsVarKeyType) String() string { | ||
| return "unlock_stats_var" | ||
| } | ||
|
|
||
| // UnlockStatsVarKey is a variable key for unlock statistic. | ||
| const UnlockStatsVarKey unlockStatsVarKeyType = 0 | ||
|
|
||
| // Next implements the Executor Next interface. | ||
| func (e *UnlockStatsExec) Next(ctx context.Context, req *chunk.Chunk) error { | ||
| do := domain.GetDomain(e.ctx) | ||
| is := do.InfoSchema() | ||
| h := do.StatsHandle() | ||
| if h == nil { | ||
| return errors.New("Unlock Stats: handle is nil") | ||
| } | ||
|
|
||
| tableNum := len(e.Tables) | ||
| if tableNum == 0 { | ||
| return errors.New("Unlock Stats: table should not empty ") | ||
| } | ||
|
|
||
| tids := make([]int64, 0, len(e.Tables)) | ||
| pids := make([]int64, 0) | ||
| for _, table := range e.Tables { | ||
| tbl, err := is.TableByName(table.Schema, table.Name) | ||
| if err != nil { | ||
| return err | ||
| } | ||
| tids = append(tids, tbl.Meta().ID) | ||
|
|
||
| pi := tbl.Meta().GetPartitionInfo() | ||
| if pi == nil { | ||
| continue | ||
| } | ||
| for _, p := range pi.Definitions { | ||
| pids = append(pids, p.ID) | ||
| } | ||
| } | ||
| msg, err := h.RemoveLockedTables(tids, pids, e.Tables) | ||
| if msg != "" { | ||
| e.ctx.GetSessionVars().StmtCtx.AppendWarning(errors.New(msg)) | ||
| } | ||
| return err | ||
| } | ||
|
|
||
| // Close implements the Executor Close interface. | ||
| func (e *UnlockStatsExec) Close() error { | ||
| return nil | ||
| } | ||
|
|
||
| // Open implements the Executor Open interface. | ||
| func (e *UnlockStatsExec) Open(ctx context.Context) error { | ||
| return nil | ||
| } |
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