Function duckdb_value_string 

pub unsafe extern "C" fn duckdb_value_string(
    result: *mut duckdb_result,
    col: idx_t,
    row: idx_t,
) -> duckdb_string

DEPRECATION NOTICE**: This method is scheduled for removal in a future release.

@return The string value at the specified location. Attempts to cast the result value to string.