tidb iter 源码

  • 2022-09-19
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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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