32 lines
1.2 KiB
Go
32 lines
1.2 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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"context"
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)
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// LogicalOptRule means a logical optimizing rule, which contains de-correlate, ppd, column pruning, etc.
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type LogicalOptRule interface {
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// Optimize return parameters:
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// 1. base.LogicalPlan: The optimized base.LogicalPlan after rule is applied
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// 2. bool: Used to judge whether the plan is changed or not by logical rule.
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// If the plan is changed, it will return true.
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// The default value is false. It means that no interaction rule will be triggered.
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// 3. error: If there is error during the rule optimizer, it will be thrown
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Optimize(context.Context, LogicalPlan) (LogicalPlan, bool, error)
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Name() string
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}
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