github.com/whtcorpsinc/milevadb-prod@v0.0.0-20211104133533-f57f4be3b597/causetstore/petri/petrictx.go (about) 1 // Copyright 2020 WHTCORPS INC, Inc. 2 // 3 // Licensed under the Apache License, Version 2.0 (the "License"); 4 // you may not use this file except in compliance with the License. 5 // You may obtain a copy of the License at 6 // 7 // http://www.apache.org/licenses/LICENSE-2.0 8 // 9 // Unless required by applicable law or agreed to in writing, software 10 // distributed under the License is distributed on an "AS IS" BASIS, 11 // See the License for the specific language governing permissions and 12 // limitations under the License. 13 14 package petri 15 16 import ( 17 "github.com/whtcorpsinc/BerolinaSQL/perceptron" 18 "github.com/whtcorpsinc/milevadb/stochastikctx" 19 ) 20 21 // petriKeyType is a dummy type to avoid naming defCauslision in context. 22 type petriKeyType int 23 24 // String defines a Stringer function for debugging and pretty printing. 25 func (k petriKeyType) String() string { 26 return "petri" 27 } 28 29 const petriKey petriKeyType = 0 30 31 // BindPetri binds petri to context. 32 func BindPetri(ctx stochastikctx.Context, petri *Petri) { 33 ctx.SetValue(petriKey, petri) 34 } 35 36 // GetPetri gets petri from context. 37 func GetPetri(ctx stochastikctx.Context) *Petri { 38 v, ok := ctx.Value(petriKey).(*Petri) 39 if !ok { 40 return nil 41 } 42 return v 43 } 44 45 // CanRuntimePruneTbl indicates whether tbl support runtime prune. 46 func CanRuntimePruneTbl(ctx stochastikctx.Context, tbl *perceptron.BlockInfo) bool { 47 if tbl.Partition == nil { 48 return false 49 } 50 return GetPetri(ctx).StatsHandle().CanRuntimePrune(tbl.ID, tbl.Partition.Definitions[0].ID) 51 } 52 53 // CanRuntimePrune indicates whether tbl support runtime prune for causet and first partition id. 54 func CanRuntimePrune(ctx stochastikctx.Context, tid, p0Id int64) bool { 55 return GetPetri(ctx).StatsHandle().CanRuntimePrune(tid, p0Id) 56 }