Re: [I] PostgreSQL compatibility: `log(0.0::float8)` should error, not return `-inf` [datafusion]

["shinzoxD (via GitHub)" <gi...@apache.org>]

shinzoxD commented on issue #22261:
URL: https://github.com/apache/datafusion/issues/22261#issuecomment-5303925284

   I'm working on this.
   
   Context: I first looked at #22263 (`SIMILAR TO` `%` wildcard), but that already has approved PR #23188, and the preferred fallbacks #22269 / #23258 are assigned. This sibling from the #22247 split is still open with no open PR.
   
   I'll keep the change tightly scoped to the issue: `log(0.0::float8)` (and other zero *values*) become the PostgreSQL domain error `cannot take logarithm of zero`. I will not change `log(1, 64)` / zero-base behavior, or the existing `log` simplifications, so this stays out of the scope-creep that closed #22564.
   
   @xiedeyantu I saw you previously took this and opened #22564. Please let me know if you are still working on a follow-up and I'll step back.


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