clflushopt opened a new pull request, #14735:
URL: https://github.com/apache/datafusion/pull/14735
## Which issue does this PR close?
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- - Part of #3929 (see the recent followup discussion) and a follow up for
#14688
## Rationale for this change
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The goal of this change is to supplement the example in #14688 with a more
useful example that demonstrates the current state of boundary analysis for
`AND` conjunctions; we also explain and show that `OR` conjunctions are not
currently supported.
## What changes are included in this PR?
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sometimes worth providing a summary of the individual changes in this PR.
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In `datafusion-examples/examples/expr_api.rs` there is now a new function
that explains data flow during boundary analysis and selectivity calculation
for the expression `age > 18 and <= 25` with some comments to explain what
the logic under the hood does.
In a separate commit, we are also adding a brief explainer of the boundary
analysis framework to the Query Optimizer section in the library guide. The
goal is to have some supporting documentation that collects, summaries and
distills
the information currently documented in the different pull requests and the
original design doc (see #3929).
## Are these changes tested?
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The change re-uses parts of the API that are already covered by existing
tests.
## Are there any user-facing changes?
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updated before approving the PR.
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Yes, this introduces a new example.
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