tidb helper 源码
tidb helper 代码
文件路径：/expression/generator/helper/helper.go
// Copyright 2019 PingCAP, Inc.
//
// 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.
package helper
// TypeContext is the template context for each "github.com/pingcap/tidb/types".EvalType .
type TypeContext struct {
// Describe the name of "github.com/pingcap/tidb/types".ET{{ .ETName }} .
ETName string
// Describe the name of "github.com/pingcap/tidb/expression".VecExpr.VecEval{{ .TypeName }} .
TypeName string
// Describe the name of "github.com/pingcap/tidb/util/chunk".*Column.Append{{ .TypeNameInColumn }},
// Resize{{ .TypeNameInColumn }}, Reserve{{ .TypeNameInColumn }}, Get{{ .TypeNameInColumn }} and
// {{ .TypeNameInColumn }}s.
// If undefined, it's same as TypeName.
TypeNameInColumn string
// Describe the type name in golang.
TypeNameGo string
// Same as "github.com/pingcap/tidb/util/chunk".getFixedLen() .
Fixed bool
}
var (
// TypeInt represents the template context of types.ETInt .
TypeInt = TypeContext{ETName: "Int", TypeName: "Int", TypeNameInColumn: "Int64", TypeNameGo: "int64", Fixed: true}
// TypeReal represents the template context of types.ETReal .
TypeReal = TypeContext{ETName: "Real", TypeName: "Real", TypeNameInColumn: "Float64", TypeNameGo: "float64", Fixed: true}
// TypeDecimal represents the template context of types.ETDecimal .
TypeDecimal = TypeContext{ETName: "Decimal", TypeName: "Decimal", TypeNameInColumn: "Decimal", TypeNameGo: "types.MyDecimal", Fixed: true}
// TypeString represents the template context of types.ETString .
TypeString = TypeContext{ETName: "String", TypeName: "String", TypeNameInColumn: "String", TypeNameGo: "string", Fixed: false}
// TypeDatetime represents the template context of types.ETDatetime .
TypeDatetime = TypeContext{ETName: "Datetime", TypeName: "Time", TypeNameInColumn: "Time", TypeNameGo: "types.Time", Fixed: true}
// TypeDuration represents the template context of types.ETDuration .
TypeDuration = TypeContext{ETName: "Duration", TypeName: "Duration", TypeNameInColumn: "GoDuration", TypeNameGo: "time.Duration", Fixed: true}
// TypeJSON represents the template context of types.ETJson .
TypeJSON = TypeContext{ETName: "Json", TypeName: "JSON", TypeNameInColumn: "JSON", TypeNameGo: "json.BinaryJSON", Fixed: false}
)
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