voonhous commented on code in PR #19863:
URL: https://github.com/apache/hudi/pull/19863#discussion_r3954794311
##########
hudi-trino/src/main/java/io/trino/plugin/hudi/HudiPredicates.java:
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@@ -29,6 +29,10 @@ public class HudiPredicates
public static HudiPredicates from(TupleDomain<ColumnHandle> predicate)
{
+ if (predicate.isNone()) {
+ return new HudiPredicates(TupleDomain.none(), TupleDomain.none());
Review Comment:
Right on the contract, and it goes one step further: returning `all()` as
the remaining filter would not make the Impact statement true either.
`computeEnforced` reads `predicate.getDomains().get()` immediately after
that `checkArgument`, and `predicate` is `newDomain`, the constraint summary,
which is `none()` in this scenario. `TupleDomain.none()` holds
`Optional.empty()`, so it is a `NoSuchElementException` instead of the
`IllegalArgumentException`. Same death before `getSplits`, different exception.
Iceberg and Delta escape that because their `none()` never comes from the
summary. `IcebergMetadata` says it in the branch itself: "Engine does not pass
none Constraint.summary. It can become none when combined with the expression
and connector's domain knowledge." Their `newDomain` is non-none, so
`computeEnforced` is well formed on both arguments. `HudiPredicates.from` reads
`constraint.getSummary()` directly, so Hudi's only route is a `none()` summary,
which `computeEnforced` is not written to accept from either side.
So there is no connector-side change that makes the guard reachable, and the
honest statement is that it is contract self-consistency rather than a behavior
fix. I have rewritten Impact to say that. The squashed commit message on master
keeps the original wording, so I have noted the edit in the body rather than
quietly swapping it.
Your `DeltaLakeSplitManager` point is right and is in the body now: Hive's
`isNone` check guards the `Constraint` argument in `HivePartitionManager`,
which `HudiSplitManager` never reads, while Delta guards both handle predicates
with `emptySplitSource` exactly as here. Your two comment-accuracy points on
`HudiSplitManager` and `TestHudiSplitSource` both hold; I will fold them into
the next hudi-trino PR rather than open an issue for two comment lines.
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