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