github.com/dolthub/go-mysql-server@v0.18.0/sql/analyzer/autocommit.go (about)

     1  // Copyright 2022 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 analyzer
    16  
    17  import (
    18  	"github.com/dolthub/go-mysql-server/sql"
    19  	"github.com/dolthub/go-mysql-server/sql/plan"
    20  	"github.com/dolthub/go-mysql-server/sql/transform"
    21  )
    22  
    23  // addAutocommitNode wraps each query with a TransactionCommittingNode.
    24  func addAutocommitNode(ctx *sql.Context, a *Analyzer, n sql.Node, scope *plan.Scope, sel RuleSelector) (sql.Node, transform.TreeIdentity, error) {
    25  	if !n.Resolved() {
    26  		return n, transform.SameTree, nil
    27  	}
    28  
    29  	// TODO: This is a bit of a hack. Need to figure out better relationship between new transaction node and warnings.
    30  	if hasShowWarningsNode(n) {
    31  		return n, transform.SameTree, nil
    32  	}
    33  
    34  	return plan.NewTransactionCommittingNode(n), transform.NewTree, nil
    35  }
    36  
    37  func hasShowWarningsNode(n sql.Node) bool {
    38  	var ret bool
    39  	transform.Inspect(n, func(n sql.Node) bool {
    40  		if _, ok := n.(plan.ShowWarnings); ok {
    41  			ret = true
    42  			return false
    43  		}
    44  
    45  		return true
    46  	})
    47  
    48  	return ret
    49  }