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Forward-merge branch-23.08 to branch-23.10 #13730

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Jul 21, 2023
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Forward-merge triggered by push to branch-23.08 that creates a PR to keep branch-23.10 up-to-date. If this PR is unable to be immediately merged due to conflicts, it will remain open for the team to manually merge.

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Closes #13709

ORC reader skips some decode steps in the corner case where a column hierarchy level contains no data (e.g. struct with no validity mask).
However, some of the skipped steps might still be required; for example, null masks need to the propagated to the child columns.

This PR removes the short-circuit in the corner case, allowing correct decode when null masks need to be propagated.
This PR also moves creation of the time zone table out of the level-by-level loop, as it can just be reused at all levels.

Authors:
  - Vukasin Milovanovic (https://github.com/vuule)

Approvers:
  - Bradley Dice (https://github.com/bdice)
  - Divye Gala (https://github.com/divyegala)

URL: #13722
@GPUtester GPUtester requested review from a team as code owners July 21, 2023 20:18
@GPUtester GPUtester requested review from vyasr, galipremsagar and nvdbaranec and removed request for a team July 21, 2023 20:18
@GPUtester GPUtester merged commit 0edea00 into branch-23.10 Jul 21, 2023
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SUCCESS - forward-merge complete.

@github-actions github-actions bot added libcudf Affects libcudf (C++/CUDA) code. Python Affects Python cuDF API. labels Jul 21, 2023
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