Function libduckdb_sys::duckdb_value_varchar_internal

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

returns: The char* value at the specified location. ONLY works on VARCHAR columns and does not auto-cast. If the column is NOT a VARCHAR column this function will return NULL.

The result must NOT be freed.