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Beego/pkg/client/orm/hints/db_hints.go
2020-08-23 21:04:34 +08:00

132 lines
2.8 KiB
Go

// Copyright 2020 beego-dev
//
// 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 hints
import (
"time"
"github.com/astaxie/beego/pkg/infrastructure/utils"
)
const (
//db level
KeyMaxIdleConnections = iota
KeyMaxOpenConnections
KeyConnMaxLifetime
KeyMaxStmtCacheSize
//query level
KeyForceIndex
KeyUseIndex
KeyIgnoreIndex
KeyForUpdate
KeyLimit
KeyOffset
KeyOrderBy
KeyRelDepth
)
type Hint struct {
key interface{}
value interface{}
}
var _ utils.KV = new(Hint)
// GetKey return key
func (s *Hint) GetKey() interface{} {
return s.key
}
// GetValue return value
func (s *Hint) GetValue() interface{} {
return s.value
}
var _ utils.KV = new(Hint)
// MaxIdleConnections return a hint about MaxIdleConnections
func MaxIdleConnections(v int) *Hint {
return NewHint(KeyMaxIdleConnections, v)
}
// MaxOpenConnections return a hint about MaxOpenConnections
func MaxOpenConnections(v int) *Hint {
return NewHint(KeyMaxOpenConnections, v)
}
// ConnMaxLifetime return a hint about ConnMaxLifetime
func ConnMaxLifetime(v time.Duration) *Hint {
return NewHint(KeyConnMaxLifetime, v)
}
// MaxStmtCacheSize return a hint about MaxStmtCacheSize
func MaxStmtCacheSize(v int) *Hint {
return NewHint(KeyMaxStmtCacheSize, v)
}
// ForceIndex return a hint about ForceIndex
func ForceIndex(indexes ...string) *Hint {
return NewHint(KeyForceIndex, indexes)
}
// UseIndex return a hint about UseIndex
func UseIndex(indexes ...string) *Hint {
return NewHint(KeyUseIndex, indexes)
}
// IgnoreIndex return a hint about IgnoreIndex
func IgnoreIndex(indexes ...string) *Hint {
return NewHint(KeyIgnoreIndex, indexes)
}
// ForUpdate return a hint about ForUpdate
func ForUpdate() *Hint {
return NewHint(KeyForUpdate, true)
}
// DefaultRelDepth return a hint about DefaultRelDepth
func DefaultRelDepth() *Hint {
return NewHint(KeyRelDepth, true)
}
// RelDepth return a hint about RelDepth
func RelDepth(d int) *Hint {
return NewHint(KeyRelDepth, d)
}
// Limit return a hint about Limit
func Limit(d int64) *Hint {
return NewHint(KeyLimit, d)
}
// Offset return a hint about Offset
func Offset(d int64) *Hint {
return NewHint(KeyOffset, d)
}
// OrderBy return a hint about OrderBy
func OrderBy(s string) *Hint {
return NewHint(KeyOrderBy, s)
}
// NewHint return a hint
func NewHint(key interface{}, value interface{}) *Hint {
return &Hint{
key: key,
value: value,
}
}