37 lines
1.1 KiB
Go
37 lines
1.1 KiB
Go
// Copyright 2024 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 base
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import (
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"github.com/pingcap/tidb/pkg/planner/cascades/util"
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)
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// Stack is abstract definition of task container.(TaskStack is a kind of array stack implementation of it)
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type Stack interface {
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Push(one Task)
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Pop() Task
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Empty() bool
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Destroy()
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}
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// Task is an interface defined for all type of optimizing work: exploring, implementing,
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// deriving-stats, join-reordering and so on.
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type Task interface {
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// Execute task self executing logic
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Execute() error
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// Desc task self description string.
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Desc(w util.StrBufferWriter)
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}
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