chore: import upstream snapshot with attribution

server/ast/alter_function.go

@@ -0,0 +1,36 @@
+// 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 ast
+
+import (
+	vitess "github.com/dolthub/vitess/go/vt/sqlparser"
+
+	"github.com/dolthub/doltgresql/postgres/parser/sem/tree"
+)
+
+// nodeAlterFunction handles *tree.AlterFunction nodes.
+func nodeAlterFunction(ctx *Context, node *tree.AlterFunction) (vitess.Statement, error) {
+	_, err := validateRoutineOptions(ctx, node.Options)
+	if err != nil {
+		return nil, err
+	}
+
+	// We intentionally don't support OWNER TO since we don't support owning objects
+	if node.Owner != "" && len(node.Options) == 0 {
+		return NewNoOp("OWNER TO is unsupported and ignored"), nil
+	}
+
+	return NotYetSupportedError("ALTER FUNCTION statement is not yet supported")
+}