PARQUET-2251 Avoid generating Bloomfilter when all pages of a column are encoded by dictionary in parquet v1 #1033
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…are encoded by dictionary in parquet pageV1
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@wgtmac @gszadovszky Please take a look, thank you~ |
wgtmac
approved these changes
Feb 24, 2023
| @Parameterized.Parameters(name = "Run {index}: parquet {1}") | ||
| public static Collection<Object[]> params() { | ||
| return Arrays.asList( | ||
| new Object[]{FILE_V1, "pageV1"}, |
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nit: the name is a little bit confusing. file format version is not same as data page version.
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thanks, I modified the description
yabola
changed the title
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@wgtmac @gszadovszky Thank you for your review and help |
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In parquet pageV1(Spark use parquet v1 default), even all pages of a column are encoded by dictionary, it will still generate BloomFilter. Actually it is unnecessary and it costs time and occupies storage. Parquet pageV2 doesn't have this problem.