Fix cross shard/keyspace joins with derived tables containing a `UNION`. #19046

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Merged

arthurschreiber merged 4 commits into vitessio:main from arthurschreiber:arthur/fix-join-with-derived-table-from-union

Jan 13, 2026

Merged

Fix cross shard/keyspace joins with derived tables containing a `UNION`. #19046

Mark the `JoinPredicate` as handled.

DCO / DCO succeeded Jan 13, 2026 in 1s

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