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Add MLWH cache hack#512

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kjsanger wants to merge 7 commits intowtsi-npg:develfrom
kjsanger:feature/mlwh-cache
Open

Add MLWH cache hack#512
kjsanger wants to merge 7 commits intowtsi-npg:develfrom
kjsanger:feature/mlwh-cache

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@kjsanger
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@kjsanger kjsanger commented Feb 9, 2026

Add a local SQLite cache of sample and study data hashes so that we can tell when certain column values have changed in the MLWH. There are columns in these tables in the MLWH that advertise change timestamps, but they often wrongly reflect the last time a row was replaced without changing its data.

This can be removed once the issue is addressed upstream.

@kjsanger kjsanger added the bug Something isn't working label Feb 9, 2026
Add a local SQLite cache of sample and study data hashes so that we
can tell when certain column values have changed in the MLWH. There
are columns in these tables in the MLWH that advertise change
timestamps, but they often wrongly reflect the last time a row was
replaced without changing its data.

This can be removed once thie issue is addressed upstream.
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Looks good Keith!

I've left some minors comments. I appreciate this is a temporary fix for an upstream issue so the feedback might not be relevant

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Maybe deserves a squash to avoid noise from the last few commits

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