```
$ ls -lR

.:
total 1645932
-rwxrwxr-x 1 milovidov milovidov 1685419984 июл  4 00:33 clickhouse
drwxrwxr-x 2 milovidov milovidov       4096 июл  4 00:36 lib
drwxrwxr-x 2 milovidov milovidov       4096 июл  4 00:36 lib64

./lib:
total 3536
-rwxr-xr-x 1 milovidov milovidov 2025032 июл  4 00:36 libc.so.6
-rw-r--r-- 1 milovidov milovidov   18816 июл  4 00:36 libdl.so.2
-rw-r--r-- 1 milovidov milovidov 1369352 июл  4 00:36 libm.so.6
-rwxr-xr-x 1 milovidov milovidov  158288 июл  4 00:36 libpthread.so.0
-rw-r--r-- 1 milovidov milovidov   40040 июл  4 00:36 librt.so.1

./lib64:
total 184
-rwxr-xr-x 1 milovidov milovidov 187376 июл  4 00:36 ld-linux-x86-64.so.2


$ sudo chroot . /clickhouse local --query "SELECT 1"
filesystem error: in temp_directory_path: path "/tmp" is not a directory: Not a directory
```
{
    auto it = scalars.find(name);
    if (scalars.end() == it)
    {
        
        
        throw Exception("Scalar " + backQuoteIfNeed(name) + " doesn't exist (internal bug)", ErrorCodes::BAD_ARGUMENTS);
    }
    return it->second;
}
Tables Context::getExternalTables() const
{
    assert(global_context != this || getApplicationType() == ApplicationType::LOCAL);
    auto lock = getLock();
    Tables res;
    for (const auto & table : external_tables_mapping)
        res[table.first] = table.second->getTable();
    if (query_context && query_context != this)
    {
        Tables buf = query_context->getExternalTables();
        res.insert(buf.begin(), buf.end());
    }
    else if (session_context && session_context != this)
    {
        Tables buf = session_context->getExternalTables();
        res.insert(buf.begin(), buf.end());
    }
    return res;
}
void Context::addExternalTable(const String & table_name, TemporaryTableHolder && temporary_table)