github.com/matrixorigin/matrixone@v0.7.0/pkg/sql/plan/function/builtin/ctl/cmd_snapshot.go (about)

     1  // Copyright 2023 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 ctl
    16  
    17  import (
    18  	"github.com/matrixorigin/matrixone/pkg/common/runtime"
    19  	pb "github.com/matrixorigin/matrixone/pkg/pb/ctl"
    20  	tspb "github.com/matrixorigin/matrixone/pkg/pb/timestamp"
    21  	"github.com/matrixorigin/matrixone/pkg/txn/client"
    22  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    23  )
    24  
    25  func handleGetSnapshotTS(proc *process.Process,
    26  	service serviceType,
    27  	parameter string,
    28  	sender requestSender) (pb.CtlResult, error) {
    29  	rt := runtime.ProcessLevelRuntime()
    30  	now, _ := rt.Clock().Now()
    31  	return pb.CtlResult{
    32  		Method: pb.CmdMethod_GetSnapshot.String(),
    33  		Data:   now.DebugString(),
    34  	}, nil
    35  }
    36  
    37  func handleUseSnapshotTS(proc *process.Process,
    38  	service serviceType,
    39  	parameter string,
    40  	sender requestSender) (pb.CtlResult, error) {
    41  	var options []client.TxnOption
    42  	rt := runtime.ProcessLevelRuntime()
    43  	if parameter != "" {
    44  		ts, err := tspb.ParseTimestamp(parameter)
    45  		if err != nil {
    46  			return pb.CtlResult{}, err
    47  		}
    48  		options = append(options, client.WithSnapshotTS(ts))
    49  	}
    50  
    51  	rt.SetGlobalVariables(runtime.TxnOptions, options)
    52  	return pb.CtlResult{
    53  		Method: pb.CmdMethod_UseSnapshot.String(),
    54  		Data:   "OK",
    55  	}, nil
    56  }