b6a95a8cb3
* Dropped unused codekit config * Integrated dynamic and static bindata for public * Ignore public bindata * Add a general generate make task * Integrated flexible public assets into web command * Updated vendoring, added all missiong govendor deps * Made the linter happy with the bindata and dynamic code * Moved public bindata definition to modules directory * Ignoring the new bindata path now * Updated to the new public modules import path * Updated public bindata command and drop the new prefix
75 lines
2 KiB
Go
75 lines
2 KiB
Go
// Copyright 2016 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,
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package perfschema
|
|
|
|
import (
|
|
"github.com/pingcap/tidb/kv"
|
|
"github.com/pingcap/tidb/model"
|
|
"github.com/pingcap/tidb/table"
|
|
)
|
|
|
|
// StatementInstrument defines the methods for statement instrumentation points
|
|
type StatementInstrument interface {
|
|
RegisterStatement(category, name string, elem interface{})
|
|
|
|
StartStatement(sql string, connID uint64, callerName EnumCallerName, elem interface{}) *StatementState
|
|
|
|
EndStatement(state *StatementState)
|
|
}
|
|
|
|
// PerfSchema defines the methods to be invoked by the executor
|
|
type PerfSchema interface {
|
|
|
|
// For statement instrumentation only.
|
|
StatementInstrument
|
|
|
|
// GetDBMeta returns db info for PerformanceSchema.
|
|
GetDBMeta() *model.DBInfo
|
|
// GetTable returns table instance for name.
|
|
GetTable(name string) (table.Table, bool)
|
|
}
|
|
|
|
type perfSchema struct {
|
|
store kv.Storage
|
|
dbInfo *model.DBInfo
|
|
tables map[string]*model.TableInfo
|
|
mTables map[string]table.Table // MemoryTables for perfSchema
|
|
|
|
// Used for TableStmtsHistory
|
|
historyHandles []int64
|
|
historyCursor int
|
|
}
|
|
|
|
var _ PerfSchema = (*perfSchema)(nil)
|
|
|
|
// PerfHandle is the only access point for the in-memory performance schema information
|
|
var (
|
|
PerfHandle PerfSchema
|
|
)
|
|
|
|
// NewPerfHandle creates a new perfSchema on store.
|
|
func NewPerfHandle(store kv.Storage) PerfSchema {
|
|
schema := PerfHandle.(*perfSchema)
|
|
schema.store = store
|
|
schema.historyHandles = make([]int64, 0, stmtsHistoryElemMax)
|
|
_ = schema.initialize()
|
|
registerStatements()
|
|
return PerfHandle
|
|
}
|
|
|
|
func init() {
|
|
schema := &perfSchema{}
|
|
PerfHandle = schema
|
|
}
|