p := participle.MustBuild(
		&Identifier{},
		participle.Lexer(sqlLexer),
		participle.CaseInsensitive("Keyword"),
	)

	id := Identifier{}
	validCases := []string{
		"a",
		"_a",
		"abc_a",
		"a2",
		`"abc"`,
		`"abc\a""ac"`,
	}
	for i, tc := range validCases {
		err := p.ParseString(tc, &id)
		if err != nil {
			t.Fatalf("%d: %v", i, err)
		}

		expectedErr error
	}{
		{".", errFileAccessDenied},
		{"/", errFileAccessDenied},
		{"..", errFileAccessDenied},