54 lines
2.2 KiB
Go
54 lines
2.2 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 infoschema
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import (
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"github.com/pingcap/tidb/pkg/ddl/placement"
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"github.com/pingcap/tidb/pkg/infoschema/context"
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"github.com/pingcap/tidb/pkg/parser/model"
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"github.com/pingcap/tidb/pkg/table"
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)
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// InfoSchema is the interface used to retrieve the schema information.
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// It works as a in memory cache and doesn't handle any schema change.
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// InfoSchema is read-only, and the returned value is a copy.
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type InfoSchema interface {
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context.MetaOnlyInfoSchema
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TableByName(schema, table model.CIStr) (table.Table, error)
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TableByID(id int64) (table.Table, bool)
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SchemaTables(schema model.CIStr) []table.Table
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FindTableByPartitionID(partitionID int64) (table.Table, *model.DBInfo, *model.PartitionDefinition)
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Misc
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base() *infoSchema
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}
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// Misc contains the methods that are not closely related to InfoSchema.
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type Misc interface {
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PolicyByName(name model.CIStr) (*model.PolicyInfo, bool)
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ResourceGroupByName(name model.CIStr) (*model.ResourceGroupInfo, bool)
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// PlacementBundleByPhysicalTableID is used to get a rule bundle.
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PlacementBundleByPhysicalTableID(id int64) (*placement.Bundle, bool)
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// AllPlacementBundles is used to get all placement bundles
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AllPlacementBundles() []*placement.Bundle
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// AllPlacementPolicies returns all placement policies
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AllPlacementPolicies() []*model.PolicyInfo
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// AllResourceGroups returns all resource groups
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AllResourceGroups() []*model.ResourceGroupInfo
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// HasTemporaryTable returns whether information schema has temporary table
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HasTemporaryTable() bool
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// GetTableReferredForeignKeys gets the table's ReferredFKInfo by lowercase schema and table name.
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GetTableReferredForeignKeys(schema, table string) []*model.ReferredFKInfo
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}
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