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by zimpenfish
2743 days ago
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> Like you write a simple looking query and it turns out to have O^2 complexity Or you have a simple fast query with a lovely plan until the database engine decides that because you now have 75 records in the middle table instead of 74, the indexes are suddenly made of lava and now you're table-scanning the big tables and your plan looks like an eldritch horror. [Not looking at MySQL in particular, oh no.] |
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