What XOR is and why it's useful

1. approxmc

   1 2 76 4.4 C++

   Approximate Model Counter

   

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3. unigen

   2 1 28 7.7 C++

   UniGen approximately uniform sampler (by meelgroup)

   

4. data-diff

   3 21 2,899 9.4 Python

   Discontinued Compare tables within or across databases

   

   As a data engineer, who is regularly fighting

   - "these two databases have different SQL dialects"

   - "did we miss a few rows due to poor transaction-isolation when trying to query recently changed rows on the upstream database"

   - "is there some checksum of a region of cells that accepts any arrangement of rows and columns that doesn't require me to think about ordering?"

   ...I've toying with trying to find a way to serialize everything consistently into something that can be XOR'd, then compare the output of XOR for two tables in two different databases that should be identical, without having to do some giant order-by comparison.

   Basically, Datafold's datadiff, but in a way that could plausibly be home-rolled for on-premise applications, and not be a total maintenance nightmare.

   https://github.com/datafold/data-diff

   Don't have anything working yet, but it just seems like one could at least xor a bunch of integers and get something useful... Somehow.

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