SimpleTypeNode.TypeName returns unexpected value

[kitagry]

Hi @goccy. Thank you for the nice plugin!

I want to use TypeName, but it returns unexpected values.

Sample code

func TestSimpleTypeNode_TypeName(t *testing.T) {
	stmt, err := zetasql.ParseScript("DECLARE x STRING(10);", zetasql.NewParserOptions(), zetasql.ErrorMessageOneLine)
	if err != nil {
		t.Fatal(err)
	}

	ast.Walk(stmt, func(n ast.Node) error {
		if n, ok := n.(*ast.SimpleTypeNode); ok {
			if n.TypeName() != "STRING" {
				t.Fatalf(`SimpleTypeNode.TypeName expect "STRING", got "%s"`, n.TypeName())
			}
		}
		return nil
	})
}

Environment

MacOS Ventura 13.6

$ clang++ --version
Apple clang version 14.0.0 (clang-1400.0.29.202)
Target: x86_64-apple-darwin22.6.0
Thread model: posix

$ go version
go version go1.21.4 darwin/amd64

expected

Test should pass.

actual

SimpleTypeNode.TypeName expect "STRING", got "pv�"