**Describe the bug**
Under certain conditions the equals comparison between String and Date yields the wrong result. Range Comparisons with greather-than-equals returns the correct result set.

**How to reproduce**
* Which ClickHouse server version to use: 21.2.5.5 (latest at the time of this issue)
* Which interface to use, if matters: HTTP (but should not matter)

```sql
CREATE TABLE default.myTable (
	myDay Date,
	myOrder Int32,
	someData String
) 
ENGINE = ReplacingMergeTree
PARTITION BY floor(toYYYYMMDD(myDay), -1)
ORDER BY (myOrder)
;

INSERT INTO default.myTable (myDay, myOrder) VALUES ('2021-01-01', 1);
INSERT INTO default.myTable (myDay, myOrder) VALUES ('2021-01-02', 2); // This row should be returned
INSERT INTO default.myTable (myDay, myOrder) VALUES ('2021-01-03', 3);

SELECT * FROM default.myTable mt
WHERE myDay = '2021-01-02';
```

**Expected behavior**
The last query in the example should yield the marked row. Instead it returns a empty result set.

There must be a connection to the used `PARTITION KEY`. The issue fails to reproduce as soon as I do any changes to the `PARTITION KEY` setting.

{
        for (size_t i = 0; i != used_key_size; ++i)
            std::cerr << (i != 0 ? ", " : "") << applyVisitor(FieldVisitorToString(), right_key[i]);
        std::cerr << "]\n";
    }
    else
        std::cerr << "+inf)\n";*/
    return forAnyHyperrectangle(used_key_size, left_key, right_key, true, right_bounded, key_ranges, 0, initial_mask,
        [&] (const std::vector<Range> & key_ranges_hyperrectangle)
    {
        auto res = checkInHyperrectangle(key_ranges_hyperrectangle, data_types);
/*      std::cerr << "Hyperrectangle: ";
        for (size_t i = 0, size = key_ranges.size(); i != size; ++i)
            std::cerr << (i != 0 ? " x " : "") << key_ranges[i].toString();
        std::cerr << ": " << res.can_be_true << "\n";*/
        return res;
    });
}
std::optional<Range> KeyCondition::applyMonotonicFunctionsChainToRange(
    Range key_range,
    const MonotonicFunctionsChain & functions,
    DataTypePtr current_type,
    bool single_point)
{
    for (const auto & func : functions)
    {
        
        
        IFunction::Monotonicity monotonicity = single_point
            ? IFunction::Monotonicity{true}