AnishMahto commented on code in PR #56160:
URL: https://github.com/apache/spark/pull/56160#discussion_r3314990945
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sql/pipelines/src/main/scala/org/apache/spark/sql/pipelines/graph/Flow.scala:
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@@ -271,6 +275,10 @@ class AutoCdcMergeFlow(
selectedSchema
}
+ // If the auxiliary table corresponding to the target already exists, verify
the user is trigging
+ // an AutoCDC transformation to that target using the same keys.
+ validateNoAutoCdcKeyDriftIfAuxTableExists()
Review Comment:
Thats fair. I went back and forth on whether to validate at
analysis/resolution time vs execution time, but I think you're right that we
should prioritize keeping the former side effect free and cheap (no catalog
lookup).
I left a comment in the code about this (and we've discussed in other PRs)
but eventually I'd like to come up with a clean refactor where `DatasetManager`
can actually handle creation/validation of the aux table, which would be before
execution time. Doesn't change functionality, but will improve UX for fast
failing.
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