37 lines
1.3 KiB
Go
37 lines
1.3 KiB
Go
// Copyright 2023 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 util
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import (
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"github.com/pingcap/tidb/pkg/types"
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)
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// PlanCacheMatchOpts store some property used to fetch plan from plan cache
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// The structure set here is to avoid import cycle
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type PlanCacheMatchOpts struct {
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// paramTypes stores all parameters' FieldType, some different parameters may share same plan
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ParamTypes []*types.FieldType
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// limitOffsetAndCount stores all the offset and key parameters extract from limit statement
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// only used for cache and pick plan with parameters in limit
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LimitOffsetAndCount []uint64
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// HasSubQuery indicate whether this query has sub query
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HasSubQuery bool
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// StatsVersionHash is the hash value of the statistics version
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StatsVersionHash uint64
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// Below are some variables that can affect the plan
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ForeignKeyChecks bool
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}
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