jackylee-ch opened a new pull request, #24990:
URL: https://github.com/apache/datafusion/pull/24990

   ## Which issue does this PR close?
   
   - N/A
   
   ## Rationale for this change
   
   The `user_doc` blocks for `covar_pop` and `bool_or` are verbatim copies of 
`covar_samp` and `bool_and`, so the SQL reference documents the wrong function. 
`covar_pop` is described as sample covariance, and `bool_or` as "true if all 
non-null input values are true" — the inverse of what it does.
   
   Existing tests already show the behaviour differs: `aggregate.slt` gives 
`covar_samp = 1` vs `covar_pop = 0.666666666667` on the same data, and 
`bool_and = false` vs `bool_or = true` on the same column.
   
   ## What changes are included in this PR?
   
   Corrects the description, `syntax_example` and `sql_example` of both, and 
regenerates `aggregate_functions.md`.
   
   ## What is the testing strategy for this PR?
   
   Docs only; the behaviour is unchanged and already covered by the 
`aggregate.slt` cases cited above.
   
   ## Are there any user-facing changes?
   
   The SQL reference for `covar_pop` and `bool_or` is now correct. No API 
change.
   


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