Oracle cli client (sqlplus) has a neat feature, if you put `/[enter]` in the prompt, it re-executes the last SQL.

```sql
:) select 1;
┌─1─┐
│ 1 │
└───┘

:) /
┌─1─┐
│ 1 │
└───┘
```

currently `<up><enter>` pollutes the screen by the SQL text and can contain SQL script, not a single query. Probably echo should be disabled in this case as well.
{
    connection->sendCancel();
    if (is_interactive)
    {
        progress_indication.clearProgressOutput();
        std::cout << "Cancelling query." << std::endl;
    }
    cancelled = true;
}
void ClientBase::processParsedSingleQuery(const String & full_query, const String & query_to_execute,