Allow pickling PyExpr#1517

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ntjohnson1 wants to merge 9 commits intoapache:mainfrom

rerun-io:nick/pickle_expr

Commits on Apr 28, 2026

Commits on May 9, 2026

Add multiprocessing test since that was motivating factor
ntjohnson1
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ci: cap test-matrix at 30 minutes to prevent 6-hour hangs

ntjohnson1
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claude
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test: move pickle/multiprocessing helpers into a non-test module

ntjohnson1
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claude
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Fix multiprocessing table name collision
ntjohnson1
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Diagnosing on CI since I can't repro locally even on my linux box
ntjohnson1
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Local dev adds .pyth file that ci installation from wheel doesn't have. Make sure pytest can see the tests directory as a package to access helpers
ntjohnson1
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Discovery of the tests module is very strange. Proving that is the root cause and we can resolve. Will follow up by reverting this and removing multiprocessing specif test because not worth the com…
ntjohnson1
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