Mars created PARQUET-2254:
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Summary: Build a BloomFilter with a more precise size
Key: PARQUET-2254
URL: https://issues.apache.org/jira/browse/PARQUET-2254
Project: Parquet
Issue Type: Improvement
Reporter: Mars
Now the usage is to specify the size, and then build BloomFilter. In general
scenarios, it is actually not sure how much the distinct value is.
If BloomFilter can be automatically generated according to the data, the file
size can be reduced and the reading efficiency can also be improved.
I have an idea that the user can specify a maximum BloomFilter filter size,
then we build several BloomFilter at the same time, we can use the largest
BloomFilter as a counting tool( If there is no hit when inserting a value, the
counter will be +1, of course this may be imprecise but enough)
Then at the end of the write, choose a BloomFilter of a more appropriate size
when the file is finally written.
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