(you don't have to strictly follow this form)

**Describe the bug**
Join fails if table names contain some special symbols (e.g. '/').

**How to reproduce**
* Which ClickHouse server version to use
version 20.11.4
* Which interface to use, if matters
* Non-default settings, if any
* `CREATE TABLE` statements for all tables involved
create table "/t0" (a Int64, b Int64) engine = MergeTree() partition by a order by a;
create table "/t1" (a Int64, b Int64) engine = MergeTree() partition by a order by a;
* Sample data for all these tables
insert into "/t0" values (0, 0);
insert into "/t1" values (0, 1);
* Queries to run that lead to unexpected result
select * from "/t0" join "/t1" using a
**Expected behavior**
A clear and concise description of what you expected to happen.

**Error message and/or stacktrace**

Received exception from server (version 20.11.4):
Code: 62. DB::Exception: Received from localhost:9000. DB::Exception: Syntax error (table or subquery or table function): failed at position 16 ('/'): /t1) as /t1. Expected one of: SELECT subquery, compound identifier, identifier, element of expression with optional alias, list of elements, function, table, table function, subquery or list of joined tables, table or subquery or table function.

**Additional context**

When I rename tables with "t0" and "t1" everything works fine. It looks like ClickHouse rewrites query somehow and uses table names without quotes.

{
    tables_with_columns = getDatabaseAndTablesWithColumns(table_expressions, context);
    if (tables_with_columns.size() != table_expressions.size())
        throw Exception("Unexpected tables count", ErrorCodes::LOGICAL_ERROR);
    const auto & settings = context->getSettingsRef();
    if (settings.joined_subquery_requires_alias && tables_with_columns.size() > 1)
    {
        for (size_t i = 0; i < tables_with_columns.size(); ++i)
        {
            const auto & t = tables_with_columns[i];
            if (t.table.table.empty() && t.table.alias.empty())
            {
                throw Exception("No alias for subquery or table function in JOIN (set joined_subquery_requires_alias=0 to disable restriction). While processing '"
                    + table_expressions[i]->formatForErrorMessage() + "'",
                    ErrorCodes::ALIAS_REQUIRED);
            }
        }
    }
    return !tables_with_columns.empty();
}
void JoinedTables::makeFakeTable(StoragePtr storage, const StorageMetadataPtr & metadata_snapshot, const Block & source_header)