chore: import upstream snapshot with attribution

2026-07-13 12:32:25 +08:00
commit e014feafe1
2285 changed files with 1131979 additions and 0 deletions
@@ -0,0 +1,70 @@
+// Copyright 2024 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/analyzer"
+	"github.com/dolthub/go-mysql-server/sql/plan"
+	"github.com/dolthub/go-mysql-server/sql/transform"
+
+	pgnodes "github.com/dolthub/doltgresql/server/node"
+)
+
+// InsertContextRootFinalizer inserts a ContextRootFinalizer node right before the transaction commits, yet after all
+// other nodes have finished. This ensures that the ContextRootFinalizer does not overwrite any changes from its
+// children.
+func InsertContextRootFinalizer(ctx *sql.Context, a *analyzer.Analyzer, node sql.Node, scope *plan.Scope, selector analyzer.RuleSelector, qFlags *sql.QueryFlags) (sql.Node, transform.TreeIdentity, error) {
+	if _, ok := node.(*pgnodes.ContextRootFinalizer); ok {
+		return node, transform.SameTree, nil
+	}
+	// Analysis may occur separately on child nodes, so we have to ensure that only one finalizer exists in the tree
+	newNode, _, err := transform.NodeWithOpaque(ctx, node, transformRemoveContextRootFinalizer)
+	if err != nil {
+		return nil, transform.NewTree, err
+	}
+	return pgnodes.NewContextRootFinalizer(newNode), transform.NewTree, nil
+}
+
+// transformRemoveContextRootFinalizer is the function used by the transform from within InsertContextRootFinalizer.
+func transformRemoveContextRootFinalizer(ctx *sql.Context, node sql.Node) (sql.Node, transform.TreeIdentity, error) {
+	if finalizer, ok := node.(*pgnodes.ContextRootFinalizer); ok {
+		return finalizer.Child(), transform.NewTree, nil
+	} else if disjointedNode, ok := node.(plan.DisjointedChildrenNode); ok {
+		var err error
+		same := transform.SameTree
+		disjointedChildGroups := disjointedNode.DisjointedChildren()
+		newDisjointedChildGroups := make([][]sql.Node, len(disjointedChildGroups))
+		for groupIdx, disjointedChildGroup := range disjointedChildGroups {
+			newDisjointedChildGroups[groupIdx] = make([]sql.Node, len(disjointedChildGroup))
+			for childIdx, disjointedChild := range disjointedChildGroup {
+				var childIdentity transform.TreeIdentity
+				newDisjointedChildGroups[groupIdx][childIdx], childIdentity, err = transform.NodeWithOpaque(ctx, disjointedChild, transformRemoveContextRootFinalizer)
+				if err != nil {
+					return nil, transform.NewTree, err
+				}
+				same = same && childIdentity
+			}
+		}
+		if same == transform.NewTree {
+			if newChild, err := disjointedNode.WithDisjointedChildren(newDisjointedChildGroups); err != nil {
+				return nil, transform.NewTree, err
+			} else {
+				return newChild, transform.NewTree, nil
+			}
+		}
+	}
+	return node, transform.SameTree, nil
+}