GH-49471, GH-49455, GH-49442, GH-49439, GH-49421 Backport several upstream fixes.#136

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lriggs merged 5 commits into

dremio:dremio_27.0_23_19from

lriggs:dmitry_commits

Apr 24, 2026

Commits on Apr 23, 2026

GH-49420: [C++][Gandiva] Fix castVARCHAR memory allocation and len<=0 handling (#49421)

dmitry-chirkov-dremio
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lriggs
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GH-49438: [C++][Gandiva] Optimize LPAD/RPAD functions (#49439)

dmitry-chirkov-dremio
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lriggs
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GH-49441: [C++][Gandiva] Add rand_integer function (#49442)

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lriggs
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GH-49454: [C++][Gandiva] Fix castVARCHAR_timestamp for pre-epoch timestamps (#49455)

dmitry-chirkov-dremio
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GH-49470: [C++][Gandiva] Fix crashes in substring_index and truncate with extreme integer values (#49471)

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