Alias 'at' not allowed

[Bartman0]

Describe the bug
An alias named 'at' is not allowed for a table in a (select-)query.

To Reproduce
@test
public void testAliasAt() throws JSQLParserException {
String sql = "SELECT * FROM table1 at";
Statement stmt = CCJSqlParserUtil.parse(sql);
TablesNamesFinder tablesNamesFinder = new TablesNamesFinder();
List tableList = tablesNamesFinder.getTableList(stmt);
assertEquals(1, tableList.size());
assertTrue(tableList.contains("table1"));
}

Expected behavior
I would expect that 'at' would be allowed as an alias name.
workaround is to put 'at' between quotes, but I do not see why this would be necessary.

System

• Java Version 11
• JSqlParser version 4.2