I do not know if it is still the case, but the last time I looked into the source code SQLite did hash all strings to the exact same value. So the bloom filter

I do not know if it is still the case, but the last time I looked into the source code SQLite did hash all strings to the exact same value. So the bloom filter optimization does not work there. It had to do with the different ways strings can be compared with collating functions, as strings may be equal even if they have different bytes: https://sqlite.org/forum/forumpost/0846211821 https://sqlite.org/forum/forumpost/0846211821