HIVE-28408: Support ARRAY field access in CBO - #5577
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zabetak
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It would be also nice to include a qfile with an EXPLAIN CBO statement that shows that we can treat ARRAY field access in CBO. Possibly the book example that I added under HIVE-28408 is a good fit. |
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@zabetak Can you please review the latest patch? I have addressed most of the comments, except the two that have I left a comment above. |
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LGTM, thanks for addressing the comments @ramesh0201 !
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What changes were proposed in this pull request?
We need to support array field access in the CBO. This is currently already supported in the execution side. Only CBO fails with an error. So we will be by passing the CBO by doing no-op in this case to leave it to hive compiler and execution engine to do rest of the work
Why are the changes needed?
In order to enable CBO for all the queries
Does this PR introduce any user-facing change?
No
Is the change a dependency upgrade?
No
How was this patch tested?
mvn test -Dtest=TestMiniLlapLocalCliDriver -Dqfile=nested_column_pruning.q