github.com/matrixorigin/matrixone@v1.2.0/pkg/sql/plan/function/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  	tspb "github.com/matrixorigin/matrixone/pkg/pb/timestamp"
    20  	"github.com/matrixorigin/matrixone/pkg/txn/client"
    21  	"github.com/matrixorigin/matrixone/pkg/vm/process"
    22  )
    23  
    24  func handleGetSnapshotTS(proc *process.Process,
    25  	service serviceType,
    26  	parameter string,
    27  	sender requestSender) (Result, error) {
    28  	rt := runtime.ProcessLevelRuntime()
    29  	now, _ := rt.Clock().Now()
    30  	return Result{
    31  		Method: GetSnapshotMethod,
    32  		Data:   now.DebugString(),
    33  	}, nil
    34  }
    35  
    36  func handleUseSnapshotTS(proc *process.Process,
    37  	service serviceType,
    38  	parameter string,
    39  	sender requestSender) (Result, error) {
    40  	var options []client.TxnOption
    41  	rt := runtime.ProcessLevelRuntime()
    42  	if parameter != "" {
    43  		ts, err := tspb.ParseTimestamp(parameter)
    44  		if err != nil {
    45  			return Result{}, err
    46  		}
    47  		options = append(options, client.WithSnapshotTS(ts))
    48  	}
    49  
    50  	rt.SetGlobalVariables(runtime.TxnOptions, options)
    51  	return Result{
    52  		Method: UseSnapshotMethod,
    53  		Data:   "OK",
    54  	}, nil
    55  }