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PARQUET-1660: align Bloom filter implementation with format #686

Merged
merged 4 commits into from
Jan 7, 2020
Merged

PARQUET-1660: align Bloom filter implementation with format #686

merged 4 commits into from
Jan 7, 2020

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chenjunjiedada
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jbapple
jbapple reviewed Oct 5, 2019
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...column/src/main/java/org/apache/parquet/column/values/bloomfilter/BlockSplitBloomFilter.java Outdated
int bucketIndex = (int)(hash >> 32) & (bitset.length / BYTES_PER_BLOCK - 1);
long numBlocks = bitset.length / BYTES_PER_BLOCK;
long lowHash = hash >>> 32;
int blockIndex = (int)(lowHash * numBlocks >> 32);
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What happens if this product overflows? How does that behavior compare to this line operating on unsigned values in C++, which cannot overflow on multiplication?

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@chenjunjiedada chenjunjiedada Oct 5, 2019 •
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The number of blocks right shift 5 bits at first, so its value should be less than 1<<27 and the overflow should not happen here.

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jbapple commented Dec 16, 2019

LGTM.

Fokko
Fokko approved these changes Dec 21, 2019
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LGTM, do you already use this internally?

parquet-column/src/main/java/org/apache/parquet/column/ParquetProperties.java Outdated
@@ -221,6 +231,12 @@ public boolean getPageWriteChecksumEnabled() {
return bloomFilterExpectedDistinctNumbers;
}

public Set<String> getBloomFilterColumns() {return bloomFilterColumns;}
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Can we put the return on the next line, similar to getMaxBloomFilterBytes

parquet-column/src/main/java/org/apache/parquet/column/ParquetProperties.java Show resolved Hide resolved
...column/src/main/java/org/apache/parquet/column/values/bloomfilter/BlockSplitBloomFilter.java Show resolved Hide resolved
@chenjunjiedada
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@Fokko, @gszadovszky, could you help to have another look? Is it close to merging?

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@Fokko, forgot your last question. Yes, we already use it internally in some cases.

@chenjunjiedada
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@gszadovszky, I updated the code, would you please take another look?

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@gszadovszky , thanks for your review. I'd like to rebase this to master before merging. Maybe it needs your another look again. Thanks in advance!

@chenjunjiedada chenjunjiedada force-pushed the bloom-filter branch 2 times, most recently from 81dd09b to 039ffdc Compare January 7, 2020 09:15
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Looks like I need to merge instead of rebasing. Let me fix this. Sorry for confusing.

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@gszadovszky @Fokko, I just realized that you may need squashing for this PR, so it would be better to submit a separated PR for merging master. So please help to merge this in your convenience.

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Fokko commented Jan 7, 2020

So you'll create a new PR from bloom-filter to master? I'm fine with that. @gszadovszky WDYT?

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@Fokko, I may put in the wrong way, but it is a PR to merge master to bloom-filter branch. I have done that job local machine and can submit that if you prefer to squash one more merging PR.

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Let's squash+merge this PR to the feature branch first. Then, check the merge PR and push it to the feature branch as well.
If everything is ready, create a PR from the feature branch to master. There shall be no conflicts. After the final review/tests succeed squash+merge the whole to master.

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SGTM

@gszadovszky gszadovszky merged commit ba28686 into apache:bloom-filter Jan 7, 2020
gszadovszky pushed a commit that referenced this pull request Feb 26, 2020
@chenjunjiedada
PARQUET-41: Add bloom filter (#757)
806037c 
* PARQUET-1328: Add Bloom filter reader and writer (#587)
* PARQUET-1516: Store Bloom filters near to footer (#608)
* PARQUET-1391: Integrate Bloom filter logic (#619)
* PARQUET-1660: align Bloom filter implementation with format (#686)
shangxinli pushed a commit to shangxinli/parquet-mr that referenced this pull request Mar 1, 2020
@chenjunjiedada @shangxinli
PARQUET-41: Add bloom filter (apache#757)
3c77510 
* PARQUET-1328: Add Bloom filter reader and writer (apache#587)
* PARQUET-1516: Store Bloom filters near to footer (apache#608)
* PARQUET-1391: Integrate Bloom filter logic (apache#619)
* PARQUET-1660: align Bloom filter implementation with format (apache#686)
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@gszadovszky gszadovszky gszadovszky approved these changes

@Fokko Fokko Fokko approved these changes

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@chenjunjiedada @jbapple @Fokko @gszadovszky