github.com/matrixorigin/matrixone@v1.2.0/pkg/vm/engine/memoryengine/log_tail.go (about)

     1  // Copyright 2022 Matrix Origin
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //      http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package memoryengine
    16  
    17  import (
    18  	"context"
    19  
    20  	apipb "github.com/matrixorigin/matrixone/pkg/pb/api"
    21  	"github.com/matrixorigin/matrixone/pkg/pb/timestamp"
    22  )
    23  
    24  func (t *Table) GetLogTail(
    25  	ctx context.Context,
    26  	from *timestamp.Timestamp,
    27  	to *timestamp.Timestamp,
    28  	targetShard Shard,
    29  ) (
    30  	resp *apipb.SyncLogTailResp,
    31  	err error,
    32  ) {
    33  
    34  	resps, err := DoTxnRequest[apipb.SyncLogTailResp](
    35  		ctx,
    36  		t.txnOperator,
    37  		true,
    38  		thisShard(targetShard),
    39  		OpGetLogTail,
    40  		&apipb.SyncLogTailReq{
    41  			CnHave: from,
    42  			CnWant: to,
    43  			Table: &apipb.TableID{
    44  				TbId: uint64(t.id),
    45  			},
    46  		},
    47  	)
    48  	if err != nil {
    49  		return nil, err
    50  	}
    51  
    52  	return &resps[0], nil
    53  }