Don't parse special Bool values

Why it matters

This change prevents unexpected interpretation of Boolean literals within Variant fields in text-based input formats, ensuring more consistent and predictable handling of Variant data. Users gain finer control over parsing behavior, avoiding potential data discrepancies caused by automatic conversion of special Boolean strings.

How to use it

To enable parsing of special Boolean values inside the Variant type in text formats, set the allow_special_bool_values_inside_variant setting to 1 (true). For example, use:

sql<br>SET allow_special_bool_values_inside_variant = 1<br>