**Describe the situation**

```
SELECT * FROM test.hits INTO OUTFILE 'dump.csv' FORMAT CSV

8873898 rows in set. Elapsed: 32.487 sec. Processed 8.87 million rows, 8.46 GB (273.15 thousand rows/s., 260.42 MB/s.)
```

is bounded by single CPU core. Too slow :(
{
    QUERIES_END,
    PARSING_EXCEPTION,
    CONTINUE_PARSING,
    EXECUTE_QUERY,
    PARSING_FAILED,
};
void interruptSignalHandler(int signum);
class InternalTextLogs;
class ClientBase : public Poco::Util::Application
{
public:
    using Arguments = std::vector<String>;
    ClientBase();
    ~ClientBase() override;
    void init(int argc, char ** argv);
protected:
    void runInteractive();
    void runNonInteractive();
    virtual bool processWithFuzzing(const String &)