chore: import upstream snapshot with attribution

server/ast/unresolved_object_name.go

@@ -0,0 +1,48 @@
+// Copyright 2023 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 ast
+
+import (
+	vitess "github.com/dolthub/vitess/go/vt/sqlparser"
+
+	"github.com/dolthub/doltgresql/postgres/parser/sem/tree"
+)
+
+// nodeUnresolvedObjectName handles *tree.UnresolvedObjectName nodes.
+func nodeUnresolvedObjectName(ctx *Context, node *tree.UnresolvedObjectName) (vitess.TableName, error) {
+	if node == nil {
+		return vitess.TableName{}, nil
+	}
+
+	var tableName vitess.TableIdent
+	var dbQual vitess.TableIdent
+	var schemaQual vitess.TableIdent
+
+	tableName = vitess.NewTableIdent(node.Parts[0])
+
+	if node.NumParts > 1 {
+		schemaQual = vitess.NewTableIdent(node.Parts[1])
+	}
+
+	if node.NumParts > 2 {
+		dbQual = vitess.NewTableIdent(node.Parts[2])
+	}
+
+	return vitess.TableName{
+		Name:            tableName,
+		DbQualifier:     dbQual,
+		SchemaQualifier: schemaQual,
+	}, nil
+}