**Use case**

Viewing binary data such as bitmasks, hashes, internal representation of IEEE-754 numbers, etc.
Mostly for debugging.

**Describe the solution you'd like**

Similar to `hex`/`unhex`.

`bin` - returns a string with `0` and `1`. Bits are in "human" order, most significant first. Most significant zero bits are not printed (except the case with single zero).

**Describe alternatives you've considered**

Now I have to run interactive `python` from command line, but I will be more happy using ClickHouse.

**Caveats**

The name `bin` may suggest that the function will "split data into bins" but it is completely unrelated.
return true;
        }
        else
        {
            return false;
        }
    }
    ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t ) const override
    {
        const IColumn * in_column = arguments[0].column.get();
        ColumnPtr out_column;
        if (tryExecute<UInt8>(in_column, out_column) ||
            tryExecute<UInt16>(in_column, out_column) ||
            tryExecute<UInt32>(in_column, out_column) ||
            tryExecute<UInt64>(in_column, out_column) ||
            tryExecute<Int8>(in_column, out_column) ||
            tryExecute<Int16>(in_column, out_column) ||
            tryExecute<Int32>(in_column, out_column) ||
            tryExecute<Int64>(in_column, out_column))
            return out_column;
        throw Exception("Illegal column " + arguments[0].column->getName()
                        + " of first argument of function " + getName(),
                        ErrorCodes::ILLEGAL_COLUMN);
    }
};
class FunctionBitPositionsToArray : public IFunction
{
public:
    static constexpr auto name = "bitPositionsToArray";
    static FunctionPtr create(ContextPtr) { return std::make_shared<FunctionBitPositionsToArray>(); }