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engines.go
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engines.go
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// Copyright 2021 Dolthub, 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 sql
import "fmt"
// Engine represents a sql engine.
type Engine struct {
Name string
support string
comment string
transaction string
xa string
savepoints string
}
var SupportedEngines = []Engine{
{Name: "InnoDB", support: "DEFAULT", comment: "Supports transactions, row-level locking, and foreign keys", transaction: "YES", xa: "YES", savepoints: "YES"},
}
// Support returns the server's level of support for the storage engine,
func (e Engine) Support() string {
support := e.support
if support == "" {
panic(fmt.Sprintf("%v does not have a default support set", e.String()))
}
return support
}
// Comment returns a brief description of the storage engine.
func (e Engine) Comment() string {
comment := e.comment
if comment == "" {
panic(fmt.Sprintf("%v does not have a comment", e.String()))
}
return comment
}
// Transactions returns whether the storage engine supports transactions.
func (e Engine) Transactions() string {
transaction := e.transaction
if transaction == "" {
panic(fmt.Sprintf("%v does not have a tranasaction", e.String()))
}
return transaction
}
// XA returns whether the storage engine supports XA transactions.
func (e Engine) XA() string {
xa := e.xa
if e.xa == "" {
panic(fmt.Sprintf("%v does not have xa support determined", e.String()))
}
return xa
}
// Savepoints returns whether the storage engine supports savepoints.
func (e Engine) Savepoints() string {
savepoints := e.savepoints
if savepoints == "" {
panic(fmt.Sprintf("%v does not have a default savepoints set", e.String()))
}
return savepoints
}
// String returns the string representation of the Engine.
func (e Engine) String() string {
return e.Name
}