github.com/dolthub/dolt/go@v0.40.5-0.20240520175717-68db7794bea6/libraries/doltcore/sqle/dsess/globalstate.go (about)

     1  // Copyright 2023 Dolthub, Inc.
     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 dsess
    16  
    17  import (
    18  	"context"
    19  	"sync"
    20  
    21  	"github.com/dolthub/go-mysql-server/sql"
    22  
    23  	"github.com/dolthub/dolt/go/libraries/doltcore/doltdb"
    24  	"github.com/dolthub/dolt/go/libraries/doltcore/ref"
    25  	"github.com/dolthub/dolt/go/libraries/doltcore/sqle/globalstate"
    26  )
    27  
    28  func NewGlobalStateStoreForDb(ctx context.Context, dbName string, db *doltdb.DoltDB) (GlobalStateImpl, error) {
    29  	branches, err := db.GetBranches(ctx)
    30  	if err != nil {
    31  		return GlobalStateImpl{}, err
    32  	}
    33  
    34  	remotes, err := db.GetRemoteRefs(ctx)
    35  	if err != nil {
    36  		return GlobalStateImpl{}, err
    37  	}
    38  
    39  	rootRefs := make([]ref.DoltRef, 0, len(branches)+len(remotes))
    40  	rootRefs = append(rootRefs, branches...)
    41  	rootRefs = append(rootRefs, remotes...)
    42  
    43  	var roots []doltdb.Rootish
    44  	for _, b := range rootRefs {
    45  		switch b.GetType() {
    46  		case ref.BranchRefType:
    47  			wsRef, err := ref.WorkingSetRefForHead(b)
    48  			if err != nil {
    49  				return GlobalStateImpl{}, err
    50  			}
    51  
    52  			ws, err := db.ResolveWorkingSet(ctx, wsRef)
    53  			if err == doltdb.ErrWorkingSetNotFound {
    54  				// use the branch head if there isn't a working set for it
    55  				cm, err := db.ResolveCommitRef(ctx, b)
    56  				if err != nil {
    57  					return GlobalStateImpl{}, err
    58  				}
    59  				roots = append(roots, cm)
    60  			} else if err != nil {
    61  				return GlobalStateImpl{}, err
    62  			} else {
    63  				roots = append(roots, ws)
    64  			}
    65  		case ref.RemoteRefType:
    66  			cm, err := db.ResolveCommitRef(ctx, b)
    67  			if err != nil {
    68  				return GlobalStateImpl{}, err
    69  			}
    70  			roots = append(roots, cm)
    71  		}
    72  	}
    73  
    74  	tracker, err := NewAutoIncrementTracker(ctx, dbName, roots...)
    75  	if err != nil {
    76  		return GlobalStateImpl{}, err
    77  	}
    78  
    79  	return GlobalStateImpl{
    80  		aiTracker: tracker,
    81  		mu:        &sync.Mutex{},
    82  	}, nil
    83  }
    84  
    85  type GlobalStateImpl struct {
    86  	aiTracker globalstate.AutoIncrementTracker
    87  	mu        *sync.Mutex
    88  }
    89  
    90  var _ globalstate.GlobalState = GlobalStateImpl{}
    91  
    92  func (g GlobalStateImpl) AutoIncrementTracker(ctx *sql.Context) (globalstate.AutoIncrementTracker, error) {
    93  	return g.aiTracker, nil
    94  }