chore: Document Comet runtime data debug #4235
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Introduce a small ExecutionPlan wrapper, DbgExec, that applies the existing dbg_batch_stream helper to whatever its inner plan emits. This lets contributors drop a one-line wrap around any native operator to see the RecordBatches it actually produces (values, schema, and per-column null buffers), which is hard to infer from a failing DataFrame assertion alone. Document it in the contributor debugging guide with a worked LEAD IGNORE NULLS example. Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
andygrove
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May 6, 2026
| need whichever one matches the granularity you want to trace — they are | ||
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I think this code should be part of the product so we make sure it always compiiles in CI. Can we put this functionality behind a config somehow?
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Which issue does this PR close?
Closes #.
Rationale for this change
Document one of the ways how to debug a running query data for specific operator
What changes are included in this PR?
How are these changes tested?