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104 lines
2.2 KiB
104 lines
2.2 KiB
// Copyright 2020 beego-dev
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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 hints
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import (
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"github.com/beego/beego/v2/core/utils"
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)
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const (
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// query level
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KeyForceIndex = iota
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KeyUseIndex
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KeyIgnoreIndex
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KeyForUpdate
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KeyLimit
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KeyOffset
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KeyOrderBy
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KeyRelDepth
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)
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type Hint struct {
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key interface{}
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value interface{}
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}
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var _ utils.KV = new(Hint)
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// GetKey return key
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func (s *Hint) GetKey() interface{} {
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return s.key
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}
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// GetValue return value
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func (s *Hint) GetValue() interface{} {
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return s.value
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}
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var _ utils.KV = new(Hint)
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// ForceIndex return a hint about ForceIndex
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func ForceIndex(indexes ...string) *Hint {
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return NewHint(KeyForceIndex, indexes)
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}
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// UseIndex return a hint about UseIndex
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func UseIndex(indexes ...string) *Hint {
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return NewHint(KeyUseIndex, indexes)
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}
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// IgnoreIndex return a hint about IgnoreIndex
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func IgnoreIndex(indexes ...string) *Hint {
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return NewHint(KeyIgnoreIndex, indexes)
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}
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// ForUpdate return a hint about ForUpdate
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func ForUpdate() *Hint {
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return NewHint(KeyForUpdate, true)
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}
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// DefaultRelDepth return a hint about DefaultRelDepth
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func DefaultRelDepth() *Hint {
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return NewHint(KeyRelDepth, true)
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}
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// RelDepth return a hint about RelDepth
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func RelDepth(d int) *Hint {
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return NewHint(KeyRelDepth, d)
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}
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// Limit return a hint about Limit
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func Limit(d int64) *Hint {
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return NewHint(KeyLimit, d)
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}
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// Offset return a hint about Offset
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func Offset(d int64) *Hint {
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return NewHint(KeyOffset, d)
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}
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// OrderBy return a hint about OrderBy
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func OrderBy(s string) *Hint {
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return NewHint(KeyOrderBy, s)
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}
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// NewHint return a hint
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func NewHint(key interface{}, value interface{}) *Hint {
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return &Hint{
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key: key,
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value: value,
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}
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}
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