Hello Calcite Community, I'm currently completing CALCITE-6224 <https://issues.apache.org/jira/browse/CALCITE-6224>. During the completion process, we found that the return result of log2(0) in calcite is different from that in mysql and spark. The return result of log2(0) in calcite is -Infinity. But mysql and spark return NULL. We are considering whether we need to adapt the return results of log2(0) in mysql and spark. But a new problem comes out, if I adapt log2(0). Then do I also need to consider the negative test of the two functions log10 and log in other databases? I believe this happens to me not only in the log function, I observed the same situation in CALCITE-6241 <https://issues.apache.org/jira/browse/CALCITE-6241>. Now my doubt is whether we need to adapt the negative test of each function in each database (because there are examples of negative test results caused by different databases and different versions) . I think we can add a negative test in calcite to tell users and developers how calcite handles the negatvie test of this kind of function, but I am not sure whether it needs to be adapted.
Best wishes, Cancai Cai
