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This topic has been translated from a Chinese forum by GPT and might contain errors.Original topic: 使用TIKV client.go客户端 txn方法删除key后，在scan prefix还能查到？
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username: 夜-NULL
The client.go client of TIKV calls the Delete method to delete a key (“$uat-zmc-xxxxxx”)
func (txn *KVTxn) Delete(k []byte) error {
return txn.us.GetMemBuffer().Delete(k)
}
Then, using the scan method to query data with the prefix “$”, the just-deleted key can still be found.
func scanKeys(prefix []byte, tx *tikv.KVTxn) [][]byte {
it, err := tx.Iter(prefix, nextKey(prefix))
if err != nil {
panic(err)
}
defer it.Close()
var ret [][]byte
for it.Valid() {
ret = append(ret, it.Key())
if err = it.Next(); err != nil {
panic(err)
}
}
return ret
}
The transaction has already been committed during the delete:
if !tx.IsReadOnly() {
tx.SetEnable1PC(true)
tx.SetEnableAsyncCommit(true)
err = tx.Commit(context.Background())
}
May I ask why this is happening? Is it only deleting the latest version in MVCC?
How can I completely delete this key?
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