tidb iter 源码
tidb iter 代码
文件路径：/kv/iter.go
// Copyright 2015 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 kv
// NextUntil applies FnKeyCmp to each entry of the iterator until meets some condition.
// It will stop when fn returns true, or iterator is invalid or an error occurs.
func NextUntil(it Iterator, fn FnKeyCmp) error {
var err error
for it.Valid() && !fn(it.Key()) {
err = it.Next()
if err != nil {
return err
}
}
return nil
}
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