} catch (SqlParseException e) {
throw new RuntimeException(e);
}
final Collection<SqlNode> literalSet = new LinkedHashSet<SqlNode>();
x.accept(
new SqlShuttle() {
private final List<SqlOperator> ops =
ImmutableList.of(
SqlStdOperatorTable.LITERAL_CHAIN,
SqlStdOperatorTable.LOCALTIME,
SqlStdOperatorTable.LOCALTIMESTAMP,