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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,98 @@ | ||
| // Copyright 2022 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 analyzer | ||
|
|
||
| import ( | ||
| "github.com/dolthub/go-mysql-server/sql" | ||
| "github.com/dolthub/go-mysql-server/sql/plan" | ||
| "github.com/dolthub/go-mysql-server/sql/transform" | ||
| ) | ||
|
|
||
| // addAutocommitNode wraps each query with a TransactionCommittingNode. | ||
| func addAutocommitNode(ctx *sql.Context, a *Analyzer, n sql.Node, scope *Scope, sel RuleSelector) (sql.Node, transform.TreeIdentity, error) { | ||
| if !n.Resolved() { | ||
| return n, transform.SameTree, nil | ||
| } | ||
|
|
||
| transactionDatabase := GetTransactionDatabase(ctx, n) | ||
|
|
||
| // TODO: This is a bit of a hack. Need to figure out better relationship between new transaction node and warnings. | ||
| if hasShowWarningsNode(n) { | ||
| return n, transform.SameTree, nil | ||
| } | ||
|
|
||
| return plan.NewTransactionCommittingNode(n, transactionDatabase), transform.NewTree, nil | ||
| } | ||
|
|
||
| func hasShowWarningsNode(n sql.Node) bool { | ||
| var ret bool | ||
| transform.Inspect(n, func(n sql.Node) bool { | ||
| if _, ok := n.(plan.ShowWarnings); ok { | ||
| ret = true | ||
| return false | ||
| } | ||
|
|
||
| return true | ||
| }) | ||
|
|
||
| return ret | ||
| } | ||
|
|
||
| // GetTransactionDatabase returns the name of the database that should be considered current for the transaction about | ||
| // to begin. The database is not guaranteed to exist. | ||
| // For USE DATABASE statements, we consider the transaction database to be the one being USEd | ||
| func GetTransactionDatabase(ctx *sql.Context, parsed sql.Node) string { | ||
| var dbName string | ||
| switch n := parsed.(type) { | ||
| case *plan.QueryProcess, *plan.TransactionCommittingNode, *plan.RowUpdateAccumulator: | ||
| return GetTransactionDatabase(ctx, n.(sql.UnaryNode).Child()) | ||
| case *plan.Use, *plan.CreateProcedure, *plan.DropProcedure, *plan.CreateTrigger, *plan.DropTrigger, | ||
| *plan.CreateTable, *plan.InsertInto, *plan.AlterIndex, *plan.AlterAutoIncrement, *plan.AlterPK, | ||
| *plan.DropColumn, *plan.RenameColumn, *plan.ModifyColumn: | ||
| database := n.(sql.Databaser).Database() | ||
| if database != nil { | ||
| dbName = database.Name() | ||
| } | ||
| case *plan.DropForeignKey, *plan.DropIndex, *plan.CreateIndex, *plan.Update, *plan.DeleteFrom, | ||
| *plan.CreateForeignKey: | ||
| dbName = n.(sql.Databaseable).Database() | ||
| case *plan.DropTable: | ||
| dbName = getDbHelper(n.Tables...) | ||
| case *plan.Truncate: | ||
| dbName = getDbHelper(n.Child) | ||
| default: | ||
| } | ||
| if dbName != "" { | ||
| return dbName | ||
| } | ||
| return ctx.GetCurrentDatabase() | ||
| } | ||
|
|
||
| // getDbHelper returns the first database name from a table-like node | ||
| func getDbHelper(tables ...sql.Node) string { | ||
| if len(tables) == 0 { | ||
| return "" | ||
| } | ||
| switch t := tables[0].(type) { | ||
| case *plan.UnresolvedTable: | ||
| return t.Database() | ||
| case *plan.ResolvedTable: | ||
| return t.Database.Name() | ||
| case *plan.IndexedTableAccess: | ||
| return t.Database().Name() | ||
| default: | ||
| } | ||
| return "" | ||
| } |
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