boluor opened a new pull request, #3809:
URL: https://github.com/apache/doris-website/pull/3809
## Summary
Doc page (4.x): \`scalar-functions/numeric-functions/log10.md\` (EN + ZH).
Both pages claimed in their Return Value section, and the EN page
additionally claimed in its example block, that \`log10(NaN)\` returns \`NaN\`.
On Apache Doris 4.1.1 the cluster actually returns \`NULL\`. The same applies
to \`log10(0)\` and \`log10(<negative>)\`.
Update:
- EN: change the example's expected output \`NaN\` → \`NULL\`.
- EN + ZH: rewrite the return-value bullet to cover NaN, zero, and negative
inputs (all return NULL).
## Verification
\`\`\`
mysql> select log10(cast('nan' as double)); -- NULL
mysql> select log10(0.0); -- NULL
mysql> select log10(-1); -- NULL
mysql> select cast('nan' as double); -- NaN (the cast itself
preserves NaN; log10 consumes it and returns NULL)
\`\`\`
## Test plan
- [x] Run each affected SELECT on a 4.1.1 cluster — all return NULL.
- [x] Cast-only check shows NaN is preserved as a double, but log10 returns
NULL.
- [x] No SQL or example removed.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
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