infoschema

Documentation

Overview

Copyright 2023 Ant Group Co., Ltd.

Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.

Index

• func FieldTypeString(tp types.FieldType) (string, error)
• func TypeConversion(tp string) (types.FieldType, error)
• func TypeDefaultValue(tp string) (interface{}, error)
• type ColumnDesc
• type InfoSchema
  • func FromTableSchema(tableSchema []*TableSchema) (InfoSchema, error)
  • func MockInfoSchema(dbTableList map[string][]*model.TableInfo) InfoSchema
• type TableSchema

Functions

func FieldTypeString

func FieldTypeString(tp types.FieldType) (string, error)

FieldTypeString converts mysql FieldType to scdb type string

func TypeConversion

func TypeConversion(tp string) (types.FieldType, error)

func TypeDefaultValue

func TypeDefaultValue(tp string) (interface{}, error)

Types

type ColumnDesc

type ColumnDesc struct {
	Name        string
	Type        string
	Description string
}

type InfoSchema

type InfoSchema interface {
	SchemaByName(schema model.CIStr) (*model.DBInfo, bool)
	TableByName(schema, table model.CIStr) (table.Table, error)
}

InfoSchema is the interface used to retrieve the schema information. It works as a in memory cache and doesn't handle any schema change. InfoSchema is read-only, and the returned value is a copy.

func FromTableSchema

func FromTableSchema(tableSchema []*TableSchema) (InfoSchema, error)

func MockInfoSchema

func MockInfoSchema(dbTableList map[string][]*model.TableInfo) InfoSchema

MockInfoSchema only serves for test.

type TableSchema

type TableSchema struct {
	DbName    string
	TableName string
	Columns   []ColumnDesc
}