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Merge pull request #1864 from dolthub/andy/database-provider
Andy/database provider
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| // Copyright 2021 Dolthub, Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package sqle | ||
|
|
||
| import ( | ||
| "github.com/dolthub/go-mysql-server/sql" | ||
| ) | ||
|
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| type DoltDatabaseProvider struct { | ||
| databases map[string]sql.Database | ||
| } | ||
|
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| var _ sql.DatabaseProvider = DoltDatabaseProvider{} | ||
|
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| func NewDoltDatabaseProvider(databases ...Database) sql.MutableDatabaseProvider { | ||
| dbs := make(map[string]sql.Database, len(databases)) | ||
| for _, db := range databases { | ||
| dbs[db.Name()] = db | ||
| } | ||
|
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| return DoltDatabaseProvider{databases: dbs} | ||
| } | ||
|
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| func (p DoltDatabaseProvider) Database(name string) (db sql.Database, err error) { | ||
| var ok bool | ||
| if db, ok = p.databases[name]; ok { | ||
| return db, nil | ||
| } | ||
|
|
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| // TODO: dynamically provide databases for refs | ||
| // eg: "USE mydatabase/mybranch;" | ||
|
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| return nil, sql.ErrDatabaseNotFound.New(name) | ||
| } | ||
|
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| func (p DoltDatabaseProvider) HasDatabase(name string) bool { | ||
| _, err := p.Database(name) | ||
| return err == nil | ||
| } | ||
|
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| func (p DoltDatabaseProvider) AllDatabases() (all []sql.Database) { | ||
| i := 0 | ||
| all = make([]sql.Database, len(p.databases)) | ||
| for _, db := range p.databases { | ||
| all[i] = db | ||
| i++ | ||
| } | ||
| return | ||
| } | ||
|
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| func (p DoltDatabaseProvider) AddDatabase(db sql.Database) { | ||
| p.databases[db.Name()] = db | ||
| } | ||
|
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| func (p DoltDatabaseProvider) DropDatabase(name string) { | ||
| delete(p.databases, name) | ||
| } |