Bankim Bhavsar created KUDU-2981:
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Summary: Push predicate evaluation into more CFile decoders
Key: KUDU-2981
URL: https://issues.apache.org/jira/browse/KUDU-2981
Project: Kudu
Issue Type: Improvement
Components: cfile, perf
Reporter: Bankim Bhavsar
Assignee: Bankim Bhavsar
Fix For: 1.12.0
Commit c0f3727 added an optimization to push predicate evaluation into the
CFile decoders without fully materializing the contents of each cblock. It did
this with dictionary-encoded blocks, but the optimization can be applied to any
other encoding types too.
A low hanging fruit is RLE decoders, which should be able to evaluate the
predicate for each run instead of materializing each cell and then applying the
predicate.
KUDU-736 also notes that we may be able to apply some predicates on bitshuffled
data.
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