tidb telemetry 源码
tidb telemetry 代码
文件路径：/planner/core/telemetry.go
// Copyright 2021 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 core
import (
"github.com/pingcap/tidb/kv"
"github.com/pingcap/tidb/util/plancodec"
)
// IsTiFlashContained returns whether the plan contains TiFlash related executors.
func IsTiFlashContained(plan Plan) (tiFlashPushDown, tiFlashExchangePushDown bool) {
if plan == nil {
return
}
var tiflashProcess func(p Plan)
tiflashProcess = func(p Plan) {
if exp, isExplain := p.(*Explain); isExplain {
p = exp.TargetPlan
if p == nil {
return
}
}
pp, isPhysical := p.(PhysicalPlan)
if !isPhysical {
return
}
if tableReader, ok := pp.(*PhysicalTableReader); ok {
tiFlashPushDown = tableReader.StoreType == kv.TiFlash
if tiFlashPushDown && tableReader.GetTablePlan().TP() == plancodec.TypeExchangeSender {
tiFlashExchangePushDown = true
}
return
}
for _, child := range pp.Children() {
tiflashProcess(child)
if tiFlashPushDown {
return
}
}
}
tiflashProcess(plan)
return
}
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